Univ. Doz. Dr. Georg Wohlfahrt

 

Georg Wohlfahrt

 

 

 

 

 

 

Biosphere-Atmosphere exchange, SVAT modelling

 

 

 

 

Papers (peer reviewed) back to top

 

For legal reasons the biomet papers are password protected.

 

2012

NEW! Niu S., Luo Y, Fei S., Yuan W., Schimel D., Ammann C., Arain A., Arneth A., Aubinet M., Barr A., Beringer J., Bernhofer C., Black A.T., Buchmann N., Cescatti A., Chen J., Davis K.J., Dellwik E., Desai A.R., Dolman H., Etzold S., Francois L., Gianelle D., Gielen B., Goldstein A., Groenendijk M., Gu L., Hanan N., Helfter C., Hirano T., Hollinger D.Y., Jones M., Kiely G., Kolb T.E., Kutsch W.L., Lafleur P., Law B.E., Lawrence D., Li. L., Lindroth A., Litvak M., Loustau D., Lund M., Ma S., Marek M., Martin T., Matteucci G., Migliavacca M., Montagnani L., Moors E., Munger J.W., Noormets A., Oechel W., Olejnik J., Kyaw Tha Paw U, Pilegaard K., Rambal S., Raschi A., Saleska S., Scott R.S., Seufert G., Spano D., Stoy P., Sutton M.A., Varlagin A., Vesala T., Weng E., Wohlfahrt G., Yang B., Zhang Z., Zhou X. (2012) Thermal Optimality of Net Ecosystem Exchange of Carbon Dioxide. New Phytologist, in press.

 

2011

Wohlfahrt G., Brilli F., Hörtnagl L., Xu X., Bingemer H., Hansel A., Loreto F. (2011) Carbonyl sulfide (COS) as a tracer for canopy photosynthesis, transpiration and stomatal conductance: potential and limitations. Plant, Cell and Environment, doi: 10.1111/j.1365-3040.2011.02451.x.

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Groenendijk M., Dolman H., Ammann C., Arneth A., Cescatti A., Dragoni D., Gash J., Gianelle D., Gioli B., Kiely G., Knohl A., Law B., Lund M., Marcolla B., van der Molen M., Montagnani L., Moors E., Richardson A., Roupsard O., Verbeeck H., Wohlfahrt G. (2011) Seasonal variation of photosynthetic model parameters and leaf area index from global Fluxnet eddy covariance data. Journal of Geophysical Research - Biogeosciences, in press.

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Hörtnagl, L., Bamberger I., Graus M., Ruuskanen T. M., Schnitzhofer R., Müller M., Hansel A., and Wohlfahrt G. (2011), Biotic, abiotic, and management controls on methanol exchange above a temperate mountain grassland, J. Geophys. Res., 116, G03021, doi:10.1029/2011JG001641.

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Bamberger I., Hörtnagl L., Ruuskanen T.M., Schnitzhofer R., Müller M., Graus M., Karl T., Wohlfahrt G., Hansel A. (2011) Deposition fluxes of terpenes over grassland, J. Geophys. Res., 116, D14305, doi:10.1029/2010JD015457.

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Balzarolo M., Anderson K., Nichol C., Rossini M., Vescovo L., Arriga N., Calvet J.-C., Carrara A., Cerasoli Salvatori S., Cogliati S., Eklundh L., Elbers J.A., Evrendilek F., Handcock R., Klumpp K., Longdoz B., Matteucci G., Meroni M., Moya I., Montagnani L., Ourcival J.-M., Pontailler J.-Y., Juszczak R., Scholes R.J., Wohlfahrt G., Martín M.P. (2011) Ground-based optical measurements at European flux sites: a review of methods, instruments and current controversies. Sensors 11, 7954 7981.

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Wang T., Ciais P., Piao S., Ottle C., Brender P., Maignan F., Arain A., Cescatti A., Gianelle D., Gough C., Gu L., Lafleur P., Laurila T., Marcolla B., Margolis H., Montagnani L., Moors E., Saigusa N., Vesala T., Wohlfahrt G., Koven C., Black A., Dellwik E., Don A., Hollinger D., Knohl A., Monson R., Munger J., Suyker A. Varlagin A., Verma S. (2011) Controls on winter ecosystem respiration in temperate and boreal ecosystems. Biogeosciences 8, 2009-2025.

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Brilli F., Hörtnagl L., Hammerle A., Haslwanter A., Hansel A., Loreto F., Wohlfahrt G. (2011) Leaf and ecosystem response to soil water availability in mountain grasslands. Agricultural and Forest Meteorology 151, 1731-1740.

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Vescovo L., Wohlfahrt G., Balzarolo M., Pilloni S., Rodeghiero M., Sottocornola M., Gianelle D. (2011) The use of new spectral vegetation indices based on the near infrared shoulder wavelengths for remote detection of grassland structural variables. International Journal of Remote Sensing, DOI:10.1080/01431161.2011.607195.

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Brilli F., Ruuskanen T.M., Schnitzhofer R., Müller M., Breitenlechner M., Bittner V., Wohlfahrt G., Loreto F., Hansel A. (2011) Detection of Plant Volatiles after Leaf Wounding and Darkening by Proton Transfer Reaction “Time-of-Flight” Mass Spectrometry (PTR-TOF). PLoS ONE 6(5): e20419. doi:10.1371/journal.pone.0020419.

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Ruuskanen T.M., Müller M., Schnitzhofer R., Karl T., Graus M., Bamberger I., Hörtnagl L., Brilli F., Wohlfahrt G., Hansel A. (2011) Eddy covariance VOC emission and deposition fluxes above grassland using PTR-TOF. Atmospheric Chemistry and Physics 11, 611-625.

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Migliavacca M., Reichstein M., Richardson A.D., Colombo R., Sutton M., Lasslop G., Wohlfahrt G., Tomelleri E., Carvalhais N., Cescatti A., Mahecha M., Montagnani L., Papale D., Zaehle S., Arain A., Arneth A., Black A.T., Dore S., Gianelle D., Helfter C., Hollinger D., Kutsch W., Law B.E., Lafleur P.M., Nouvellon Y., Rebmann C., da Rocha H., Rodeghiero M., Roupsard O., Sebastia M.-T., Seufert G., Soussana J.-F., van der Molen M.K. (2011) Semi-empirical modeling of abiotic and biotic factors controlling ecosystem respiration across eddy covariance sites. Global Change Biology 17, 390-409.

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Groenendijk M., Dolman A.J., van der Molen M.K., Arneth A., Delpierre N., Gash J.H.C., Leuning R., Lindroth A., Richardson A.D., Verbeek H., Wohlfahrt G. (2011) Assessing parameter variability in a photosynthesis model within and between plant functional types using global Fluxnet eddy covariance data. Agricultural and Forest Meteorology 151, 22-38.

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Noe S.M., Kimmel V. , Hüve K., Copolovici L.O., Portillo-Estrada M., Püttsepp Ü., Jõgiste K., Niinemets Ü., Hörtnagl L., Wohlfahrt G. (2011) Ecosystem-scale biosphere-atmosphere interactions of a hemiboreal mixed forest stand at Järvselja, Estonia. Forest Ecology and Management 262, 71-81.

 

2010

Wohlfahrt G., Irschick C., Thalinger B., Hörtnagl L., Obojes N., Hammerle A. (2010) Insights from independent evapotranspiration estimates for closing the energy balance: a grassland case study. Vadose Zone Journal 9, 1025-1033.

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Teuling A.J., Seneviratne S.I., Stöckli R., Reichstein M., Moors E., Ciais P., Luyssaert S., van den Hurk B., Ammann C., Bernhofer C., Dellwik E., Gianelle D., Gielen B., Grünwald T., Klumpp K., Montagnani L., Moureaux C., Sottocornola M., Wohlfahrt G. (2010) Contrasting response of European forest and grassland energy exchange to heat waves. Nature Geoscience, doi:10.1038/ngeo950.

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Yi C., Ricciuto D., Li R., Wolbeck J., Xu X., Aires L., Albertson J.D., Amiro B., Ammann C., Arain M.A., de Araujo A.C., Aubinet M., Aurela M., Baldocchi D.D., Barcza Z., Barr A., Berbigier P., Beringer J., Bernhofer C., Black A.T., Bolstad P.V., Bosveld F., Broadmeadow M.S.J., Buchmann N., Burns S.P., Cellier P., Chen J., Chen J., Ciais P., Clement R., Cook B. D., Curtis P.S., Dail B., Davis K.J., Dellwik E., Delpierre N., Desai A.R., Dolman H., Dore S., Dragoni D., Drake B.G., Dufrene E., Dunn A., Elbers J., Eugster W., Falk M., Feigenwinter C., Flanagan L.B., Foken T., Frank J., Fuhrer J., Gianelle D., Goldstein A., Goulden M., Granier A., Grünwald T., Gu L., Hammerle A., Han S., Hanan N.P., Haszpra L., Heinesch B., Helfter C., Hendriks D., Hollinger D.Y., Hutley L.B., Ibrom A., Jacobs C., Johansson T., Jongen M., Katul G., Kiely G., Klumpp K., Knohl A., Kolb T., Kutsch W.L., Lafleur P., Laurila T., Law B.E., Leuning R., Lindroth A., Liu H., Loubet B., Manca G., Marek M., Margolis H., Martin T.A., Massman W.J., Matamala R., Matteucci G., McCaughey H., Merbold L., Meyers T., Migliavacca M., Miglietta F., Misson L., Mölder M., Moncrieff J., Monson R.K., Montagnani L, Montes-Helu M., Moors E., Moureaux C., Mukelabai M.M., Munger J.W., Myklebust M., Nagy Z., Nilsson M., Noormets A., Oechel W., Oren R., Pallardy S.G., Papale D., Paw U K.T., Pereira J.S., Pilegaard K., Pinter K., Pio C., Pita G., Powell T. L., Rambal S., Randerson J.T., von Randow C., Rebmann C., Reichstein M., Richardson A.D., Rinne J., Rossi F., Roulet N., Ryel R.J., Sagerfors J., Saigusa N. , Sanz M.J., Mugnozza G.-S., Schmid H.P., Seufert G., Siqueria M., Soussana J.-F., Starr G., Stoy P., Sutton M., Tenhunen J., Tuba Z., Tuovinen J.-P., Valentini R., Vesala T., Vogel C.S., Wang S., Wang W., Welp L.R., Wen X., Wharton S., Wilkinson M., Williams C.A., Wofsy S.C., Wohlfahrt G., Yamamoto S., Yu G., Zampedri R., Zhang X., Zhao B., Zhao X. (2010) Climate control of terrestrial carbon exchange across biomes and continents. Environmental Research Letters 5, 034007.

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Schmitt M., Bahn M., Wohlfahrt G., Tappeiner U., Cernusca A. (2009) Land use affects the net ecosystem CO2 exchange and its components in mountain grasslands. Biogeosciences 7, 2297 2309.

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Bamberger I., Hörtnagl L., Schnitzhofer R., Graus M., Ruuskanen T., Müller M., Dunkel J., Wohlfahrt G., Hansel A. (2010) BVOC fluxes above mountain grassland. Biogeosciences 7, 1413 1424.

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Hörtnagl L., Clement R., Graus M., Hammerle A., Hansel A., Wohlfahrt G. (2010) Dealing with disjunct concentration measurements in eddy covariance applications: a comparison of available approaches. Atmospheric Environment 44, 2024-2032.

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Müller M., Graus M., Ruuskanen T.M., Schnitzhofer R., Bamberger I., Kaser L., Titzmann T., Hörtnagl L., Wohlfahrt G., Karl T., Hansel A. (2010) First eddy covariance measurements by PTR TOF. Atmospheric Measurement Techniques 3, 387 395.

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Wohlfahrt G., Pilloni S., Hörtnagl L., Hammerle A. (2010) Estimating carbon dioxide fluxes from temperate mountain grasslands using broad-band vegetation indices. Biogeosciences 7, 683-694.

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Lasslop G., Reichstein M., Papale D., Richardson A., Arneth A., Barr A., Stoy P., Wohlfahrt G. (2010) Separation of net ecosystem CO2 exchange into assimilation and respiration using a light response curve approach: critical issues and global evaluation. Global Change Biology 16, 187-208.

 

2009

Stoy P.C., Richardson A.D., Baldocchi D.D., Katul G.G., Stanovick J., Mahecha M.D., Reichstein M., Detto M., Law B.E., Wohlfahrt G., Arriga N., Campos J., McCaughey J.H., Montagnani L., Paw U K.T., Sevanto S., Williams M. (2009) Biosphere-atmosphere exchange of CO2 in relation to climate: a cross-biome analysis across multiple time-scales. Biogeosciences 6, 2297-2312.

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Wohlfahrt G., Hörtnagl L., Hammerle A., Graus M., Hansel A. (2009) Measuring eddy covariance fluxes of ozone with a slow-response analyser. Atmospheric Environment, 43, 4570 - 4576

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Wohlfahrt G., Haslwanter A., Hörtnagl L., Jasoni R L., Fenstermaker L. F., Arnone J. A. III, Hammerle A. (2009) On the consequences of the energy imbalance for calculating surface conductance to water vapour. Agricultural and Forest Meteorology, 149, 1556 - 1559.

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Beer C., Ciais P., Reichstein M., Baldocchi D., Law B., Papale D., Soussana J.-F., Ammann C., Buchmann N., Frank D., Gianelle D., Janssens I.A., Knohl A., Köstner B., Moors E., Roupsard O., Verbeeck H., Vesala T., Williams C., Wohlfahrt G. (2009) Temporal and among-site variability of inherent water-use efficiency at the ecosystem scale. Global Biogeochemical Cycles, 23, GB2018, doi:10.1029/2008GB003233.

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Tenhunen J., Geyer R., Adiku S., Reichstein M., Tappeiner U., Bahn M., Cernusca A. Dinh N.Q., Kolcun O., Lohila A., Otieno D., Schmidt M., Schmitt M., Wang Q., Wartinger M., Wohlfahrt G. (2009) Influences of changing land use and CO2 concentration on ecosystem and landscape level carbon and water balances in mountainous terrain of the Stubai Valley, Austria. Global and Planetary Change 67, 29‑43.

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Teuling A.J., Hirschi M., Ohmura A., Wild M., Reichstein M., Ciais P., Buchmann N., Ammann C., Montagnani L., Richardson A.D., Wohlfahrt G., Seneviratne S. (2009) A regional perspective on trends in continental evaporation. Geophys. Res. Lett., 36, L02404, doi:10.1029/2008GL036584

Haslwanter A., Hammerle A., Wohlfahrt G. (2009) Open- vs. closed-path eddy covariance measurements of the net ecosystem carbon dioxide and water vapour exchange: a long-term perspective. Agricultural and Forest Meteorology, 149, 291 – 302.

 

2008

Fritsche J., Wohlfahrt G., Ammann Ch., Zeeman M.J., Hammerle A., Obrist D., Alewell Ch. (2008) Summertime elemental mercury exchange of temperate grasslands on an ecosystem‑scale. Atmospheric Chemistry and Physics, 8, 7709–7722.

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Cernusca A., Bahn M., Berninger F., Tappeiner U., Wohlfahrt G. (2008) Preface to CarboMont special issue: Effects of land-use changes on sources, sinks and fluxes of carbon in European mountain grasslands. Ecosystems 11, 1335‑1337

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Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Tappeiner U., Cernusca A. (2008) Disentangling leaf area and environmental effects on the response of the net ecosystem CO2 exchange to diffuse radiation. Geophysical Research Letters 35, L16805, doi:10.1029/2008GL035090.

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Hammerle A., Haslwanter A., Tappeiner U., Cernusca A. and Wohlfahrt G. (2008) Leaf area controls on energy partitioning of a temperate mountain grassland. Biogeosciences, 5, 421-431, 2008.

Wohlfahrt G., Anderson-Dunn M., Bahn M., Balzarolo M., Berninger F., Campbell C., Carrara A., Cescatti A., Christensen T., Dore S., Eugster W., Friborg T., Furger M., Gianelle D., Gimeno C., Hargreaves K., Hari P., Haslwanter A., Johansson T., Marcolla B., Milford C., Nagy Z., Nemitz E., Rogiers N., Sanz M.J., Siegwolf R.T.W., Susiluoto S., Sutton M., Tuba Z., Ugolini F., Valentini R., Zorer R., Cernusca A. (2008) Biotic, abiotic and management controls on the net ecosystem CO2 exchange of European mountain grasslands. Ecosystems 11, 1338‑1351.

Wohlfahrt G., Fenstermaker L.F., Arnone J.A. III (2008) Large annual net ecosystem CO2 uptake of a Mojave Desert ecosystem. Global Change Biology, 14, 1475–1487, doi: 10.1111/j.1365-2486.2008.01593.x

Wieser G., Hammerle A., Wohlfahrt G. (2008) The water balance of grassland ecosystems in the Austrian Alps. Arctic, Antarctic and Alpine Research, 40, No. 2, 439–445, 2008.

trennlinie

Wohlfahrt, G., A. Hammerle, A. Haslwanter, M. Bahn, U. Tappeiner, and A. Cernusca (2008), Seasonal and inter-annual variability of the net ecosystem CO2 exchange of a temperate mountain grassland: Effects of weather and management, J. Geophys. Res., 113, D08110, doi:10.1029/2007JD009286.

 

2007

Bahn M., Rodeghiero M., Anderson M., Dore S., Gimeno S., Drösler M., Williams M., Ammann C., Berninger F., Flechard C., Jones S., Balzarolo M., Kumar S., Newesely C., Priwitzer T., Raschi A., Siegwolf R., Susiluoto S., Tenhunen J., Wohlfahrt G., Cernusca A. (2007) Soil respiration in European grasslands in relation to climate and assimilate supply. Ecosystems 11, 1352‑1367.

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Gilmanov et al. (2007): Partitioning European grassland net ecosystem CO2 exchange into gross primary productivity and ecosystem respiration using light response function analysis. Agriculture, Ecosystems and Environment.

Hammerle A., Haslwanter A., Schmitt M., Bahn M., Tappeiner U., Cernusca A., Wohlfahrt G. (2007) Eddy covariance measurements of carbon dioxide, latent and sensible energy fluxes above a meadow on a mountain slope. Boundary-Layer Meteorology, 122, 397–416 (DOI 10.1007/s10546-006-9109-x)

 

before 2007

Wohlfahrt G., Bianchi K., Cernusca A. (2006) Leaf and stem maximum water storage capacity of herbaceous plants in a mountain meadow. Journal of Hydrology 319, 383-390.

Wohlfahrt G., Bahn M., Haslwanter A., Newesely Ch., Cernusca A. (2005) Estimation of daytime ecosystem respiration to determine gross primary production of a mountain meadow. Agricultural and Forest Meteorology 130, 13‑25.

Wohlfahrt G., Anfang Ch., Bahn M., Haslwanter A., Newesely Ch., Schmitt M., Drösler M., Pfadenhauer J., Cernusca A. (2005) Quantifying nighttime ecosystem respiration of a meadow using eddy covariance, chambers and modelling. Agricultural and Forest Meteorology 128, 141‑162.

Wohlfahrt G. (2004) Modelling fluxes and scalar concentrations of CO2, H2O and sensible heat within and above a mountain meadow canopy: a comparison of three Lagrangian models and three parameterisation options for the Lagrangian time scale. Boundary-Layer Meteorology 113, 43‑80.

Wohlfahrt G., Bahn M., Newesely Ch., Sapinsky S., Tappeiner U., Cernusca A. (2003) Canopy structure versus physiology effects on net photosynthesis of mountain grasslands differing in land use. Ecological Modelling 170, 407‑426.

Wohlfahrt G., Cernusca A. (2002) Momentum transfer by a mountain meadow canopy: a simulation analysis based on Massman’s (1997) model. Boundary-Layer Meteorology 103, 391-407.

Wohlfahrt G., Sapinsky S., Tappeiner U., Cernusca A. (2001) Estimation of plant area index of grasslands from measurements of canopy radiation profiles. Agricultural and Forest Meteorology 109, 1-12.

Wohlfahrt G., Bahn M., Tappeiner U., Cernusca A. (2001) A multi-component, multi-species model of vegetation-atmosphere CO2 and energy exchange for mountain grasslands. Agricultural and Forest Meteorology 106, 261‑287.

Wohlfahrt G., Bahn M., Tappeiner U., Cernusca A. (2000) A model of whole plant gas exchange: model algorithms, parameterisation and validation for five herbaceous species from three mountain grassland sites differing in land use. Ecological Modelling 125, 173‑201.

Wohlfahrt G., Bahn M., Haubner E., Horak I., Michaeler W., Rottmar K., Tappeiner U., Cernusca A. (1999) Inter-specific variation of the biochemical limitation to photosynthesis and related leaf traits of 30 species from mountain grassland differing in land use. Plant, Cell and Environment 22, 1281‑1296.

Wohlfahrt G., Bahn M., Cernusca A. (1999) The use of the ratio between the photosynthesis parameters Pml and VCmax for scaling up photosynthesis of C3 plants from leaves to canopies. A critical examination of different modelling approaches. Journal of Theoretical Biology 200, 163‑181.

Wohlfahrt G., Bahn M., Horak I., Tappeiner U., Cernusca A. (1998) A nitrogen sensitive model of leaf carbon dioxide and water vapour gas exchange: application to 13 key species from differently managed mountain grassland ecosystems. Ecological Modelling 113, 179‑199.

 

 

Papers submitted back to top

 

 

 

Posters back to top

 

Irschick C., Carli E., Eliskases C., Frischmann S., Fritsch U., Gobiet A., Haas H., Kapelari S., Norz J., Themeßl M., Zebisch M., Wohlfahrt G. (2011) GrassClim - Interaktive Effekte von Klimawandel und Bewirtschaftung auf den Ertrag und die Kohlendioxidsenken/quellenstärke von Grünland. 12. Österreichi-scher Klimatag, 21-22 September 2011, Vienna, Austria.

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Wohlfahrt G., Brilli F., Hörtnagl L., Xu X., Bingemer H., Hansel A., Loreto F. (2011) Carbonyl sulfide (COS) as a tracer for canopy photosynthesis, transpiration and stomatal conductance: potential and limitations. 3rd iLEAPS Science Conference, 18-23 September 2011, Garmisch-Partenkirchen, Germany.

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Bamberger I., Hörtnagl L., Ruuskanen T., Schnitzhofer R., Müller M., Graus M., Karl T., Hansel A., Wohlfahrt G. (2011) Grassland: Not only a source for VOCs. 3rd iLEAPS Science Conference, 18-23 September 2011, Garmisch-Partenkirchen, Germany.

 

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Hörtnagl L., Bamberger I., Graus M., Ruuskanen T., Schnitzhofer R., Hansel A. and Wohlfahrt G. (2011) Acetone and acetaldehyde exchage above a managed temperate mountain grassland. EGU2011-2244, European Geophysical Union 2011 General Assembly, 04-08 May 2011, Vienna, Austria.

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Irschick C., Liener T., Hammerle A., Wohlfahrt G. (2011) Inverse Estimation of the Parameters of a Canopy Gross Photosynthesis Model. EGU2011-2244, European Geophysical Union 2011 General Assembly, 04-08 May 2011, Vienna, Austria.

 

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Dobesberger Dobesberger P., Zeidler A., Wohlfahrt G. (2011) Calibration and Comparison of three SVAT (Surface-Vegetation-Atmosphere Transfer) models. EGU2011-10117, European Geophysical Union 2011 General Assembly, 03 - 08 April 2011, Vienna, Austria.

 

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Hörtnagl L., Bamberger I., Graus M., Ruuskanen T., Schnitzhofer R., Müller M., Hansel A. and Wohlfahrt G. (2011) Biotic, abiotic and management controls on methanol exchange above a temperate mountain grassland. 5th International PTR-MS conference, 26 January - 02 February 2011, Obergurgl, Austria.

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Bamberger I., Hörtnagl L., Ruuskanen T., Schnitzhofer R., Müller M., Graus M., Karl T., Hansel A. and Wohlfahrt G. (2011) Grassland: a source and sink of VOCs. 5th International PTR-MS conference, 26 January - 02 February 2011, Obergurgl, Austria.

 

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Ruuskanen T., Müller M., Schnitzhofer R., Karl T., Graus M., Bamberger I., Hörtnagl L., Brilli F., Wohlfahrt G. and Hansel A. (2011) Emission and deposition of VOC from/to a mountain grassland: an eddy covariance case study using a PTR-TOF. 5th International PTR-MS conference, 26 January - 02 February 2011, Obergurgl, Austria.

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Wohlfahrt G., Hammerle A., Haslwanter A., Hörtnagl L., Irschick C. (2010) Breathing of the Biosphere: A Decade of Ecosystem-Atmosphere Trace Gas Exchange Measurements at the LTER Austria Site Neustift

 

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Bamberger I., Hörtnagl L., Schnitzhofer R., Graus M., Ruuskanen T., Müller M., Dunkl J., Hansel A., Wohlfahrt G. (2010) BVOC fluxes from growing and cut grass above a mountain meadow. EGU2010-4532, European Geophysical Union 2010 General Assembly, 02–07 May 2010, Vienna, Austria.

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Müller M., Graus M., Ruuskanen T.,Schnitzhofer R., Bamberger I., Kaser L., Hörtnagl L., Wohlfahrt G., Karl T., Hansel A. (2010) First eddy covariance flux measurements of methanol by PTR-TOF. EGU2010-3606, European Geophysical Union 2010 General Assembly, 02–07 May 2010, Vienna, Austria.

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Hörtnagl, L.; Bamberger, I.; Graus, M.; Ruuskanen, T.; Schnitzhofer, R.; Müller, M.; Hansel, A.; Wohlfahrt, G. (2010) Biotic, abiotic and management controls on methanol fluxes above a temperate mountain grassland. EGU2010-4462, European Geophysical Union 2010 General Assembly, 02–07 May 2010, Vienna, Austria.

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Irschick, C.; Haslwanter, A.; Hammerle, A.; Wohlfahrt, G.; (2010) Regional variability of grassland CO2 fluxes in Tyrol/Austria. EGU2010-3916, European Geophysical Union 2010 General Assembly, 02–07 May 2010, Vienna, Austria.

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Haslwanter, A.; Hammerle, A.; Wohlfahrt, G.; (2010) Scale effects on the controls on mountain grassland leaf stomatal and ecosystem surface conductance to water vapour. EGU2010-3924, European Geophysical Union 2010 General Assembly, 02–07 May 2010, Vienna, Austria.

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Hammerle A., Wohlfahrt G., Williams M. (2010) Modelling Carbon Storage of a Temperate Mountain Grassland as Affected by Management. Swiss Global Change Day 2010, 20 April 2010, Bern, Switzerland.

 

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Hörtnagl L., Clement R., Graus M., Hammerle A., Hansel A., Wohlfahrt G. (2009) Dealing with disjunct concentration measurements in eddy covariance applications: a comparison of available approaches with particular reference to VOC fluxes measured with a PTR-MS. EGU2009-4023, European Geophysical Union 2009 General Assembly, 19–24 April 2009, Vienna, Austria.

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Hammerle A., Hörtnagl L., Wohlfahrt G. (2009) Using broad-band reflectance indices to estimate carbon dioxide fluxes of a temperate mountain grassland. EGU2009-4876, European Geophysical Union 2009 General Assembly, 19–24 April 2009, Vienna, Austria.

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Wohlfahrt G., Hörtnagl L., Bamberger I., Schnitzhofer R., Dunkl J., Hammerle A., Graus M., Hansel A. (2009) Methanol emissions from a grassland: a role of ozone stress? EGU2009-4195, European Geophysical Union 2009 General Assembly, 19–24 April 2009, Vienna, Austria.

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Arnone J.A. III, Jasoni R.J., Larsen J.D., Fenstermaker L.F., Wohlfahrt G. (2008) Atmospheric-ecosystem CO2 exchange in sparse arid shrublands across the Great Basin USA over multiple years: identifying patterns and mechanisms. AGU fall meeting, 15‑19 December 2008, San Francisco, CA/USA.

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Wohlfahrt G., Hoertnagl L., Bamberger I., Schnitzhofer R., Dunkel J., Hammerle A., Graus M., Hansel A. (2008) The VOC-Ozone connection: a grassland case study. AGU fall meeting, 15‑19 December 2008, San Francisco, CA/USA.

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Hammerle A., Hörtnagl L., Wohlfahrt G. (2008) Using broad‑band reflectance indices to estimate carbon dioxide fluxes from a temperate mountain grassland. AGU fall meeting, 15‑19 December 2008, San Francisco, CA/USA.

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Hörtnagl L., Bamberger I., Schnitzhofer R., Dunkel J., Hammerle A., Graus M., Hansel A., Wohlfahrt G. (2008) The VOC-Ozone connection: a grassland case study. Marie Curie iLeaps Conference 16-20 November 2008, Hyeres, France.

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Lasslop G., Reichstein M., Papale D., Richardson A., Wohlfahrt G. (2008) Comparison of daytime and nighttime data based estimates of GPP and Reco. 6th CarboEurope IP meeting, 29 September – 2 October 2008, Jena, Germany.

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Myklebust M., Hipps L., Huc R., Misson L., Ryel R., Wohlfahrt G., Chojnicki B., Curtis P., Delpierre N., Frokling S., Granier A., Lafleur P., Aurela M., Bolstad P., Cavaleri M., Chambers J., Desai A., Van Gorsel E., Ito A., Loescher H., Oberbauer S., Pumpanen J., Ryan M., Saigusa N., Vesala T. (2008) Is the underestimate of ecosystem respiration measured by eddy covariance related to LAI ? ADVEX final workshop, 30 June‑1 July 2008, Gembloux, Belgium.

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Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Tappeiner U., Cernusca A. (2008) The sensitivity of the net ecosystem CO2 exchange of a temperate mountain grassland to weather. COST Strategic Workshop 'Global Change & Sustainable Development', 7–9 April 2008, Innsbruck, Austria.

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Pilloni, S.; Heinl, M.; Hammerle, A.; Gianelle, D.; Vescovo, L.; Tappeiner, U.; Wohlfahrt, G. (2008) Estimating the Plant Area Index and Phytomass of Mountain Grasslands from Multi spectral Reflectance. EGU2008-A-01413, European Geophysical Union 2008 General Assembly, 13–18 April 2008, Vienna, Austria.

Hörtnagl, L.; Hammerle, A.; Wohlfahrt, G. (2008) Dealing with disjunct concentration measurements in eddy covariance applications: a comparison of available approaches. EGU2008-A-01152, European Geophysical Union 2008 General Assembly, 13–18 April 2008, Vienna, Austria.

Wohlfahrt, G.; Hammerle, A.; Haslwanter, A.; Bahn, M.; Tappeiner, U.; Cernusca, A. (2008) Diffuse vs. direct radiation effects on the ecosystem CO2 exchange of a mountain grassland: a combined theoretical and experimental study. EGU2008-A-01150, European Geophysical Union 2008 General Assembly, 13–18 April 2008, Vienna, Austria.

Hammerle A., Bahn M., Tappeiner U., Cernusca A., Wohlfahrt G. (2008) Die Auswirkungen der Bewirtschaftung auf das Kohlenstoff-speicherpotential einer Mähwiese: Messungen und Modelsimulationen. 10.Österreichischer Klimatag, 13-14 March 2008, Vienna, Austria.

Kapelari S., Santeler E., Neuner K., Hammerle A., Wohlfahrt G. (2008) Klimawandel: Wie sag' ich es meinen ... SchülerInnen?. 10.Österreichischer Klimatag, 13-14 March 2008, Vienna, Austria.

Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Tappeiner U., Cernusca A. (2007) Eddy Covariance Measurements of CO2 and Energy Fluxes above Mountain Grasslands in the Austrian Alps: Challenges and Results. AGU fall meeting 2007, 10‑14 December 2007, San Francisco, USA.

Wohlfahrt G., Hansel A., Niinemets Ü. (2007) Measuring and modelling fluxes of volatile organic compounds (VOC) between mountain grassland ecosystems and the atmosphere. Marie Curie-iLEAPS workshop “Towards a process‑based description of trace gas emissions in land surface models”, 16-19 October 2007, Helsingborg, Sweden.

Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Tappeiner U., Cernusca A. (2007) Interannual variability of the net ecosystem CO2 exchange of a temperate mountain grassland. Conference “Managing Alpine Future, 15-17 October 2007, Innsbruck, Austria.

Pilloni, S.; Heinl, M.; Hammerle, A.; Gianelle, D.; Vescovo, L.; Tappeiner, U.; Wohlfahrt, G. (2007) Estimating the Plant Area Index of Mountain Grasslands from Multi spectral Reflectance. EGU2007-A-01271, European Geophysical Union 2007 General Assembly, 15–20 April 2007, Vienna, Austria.

Leitinger, G.; Wohlfahrt, G.; Tappeiner, U. (2007) Simulating the Effects of Land-Use Changes on Landscape-Scale Water Cycles in Alpine Landscapes. EGU2007-A-03875, European Geophysical Union 2007 General Assembly, 15–20 April 2007, Vienna, Austria.

Kapelari, S.; Santeler, E.; Neuner, K.; Hammerle, A. ; Wohlfahrt, G. (2007) Making it obvious – How an entire School was introduced to Climate Change Research. EGU2007-A-08571, European Geophysical Union 2007 General Assembly, 15–20 April 2007, Vienna, Austria.

Wohlfahrt G., Hammerle A., Haslwanter A., Munk K. (2006) Comparative analysis of the net ecosystem CO2, H2O and energy exchange of mountain meadows. NitroEurope kick-off meeting, 13-17 March 2006, Garmisch-Partenkirchen, Germany.

Schmitt M., Bahn M., Wohlfahrt G., Cernusca A. (2006) Land use and phenology affect the net ecosystem exchange of CO2 in temperate mountain grasslands. EGU06-A-00780, European Geophysical Union 2006 General Assembly, 02–07 April 2006, Vienna, Austria.

Hammerle A., Haslwanter A., Schmitt M., Bahn M., Cernusca A., Wohlfahrt G. (2006) Eddy covariance measurements of carbon dioxide, latent and sensible energy fluxes above a meadow on a mountain slope. EGU06-A-00324, European Geophysical Union 2006 General Assembly, 02–07 April 2006, Vienna, Austria.

 

 

Presentations back to top

 

Hörtnagl L., Bamberger I., Graus M., Ruuskanen T.M., Schnitzhofer R., Hansel A., Wohlfahrt G. (2011) BVOC fluxes over a temperate mountain grassland. MUSCATEN - Abba workshop: Biogenic VOC: emissions, aerosol formation, modelling. 19-21 October 2011, near Tartu, Estonia.

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Wohlfahrt G., Hammerle A., Hörtnagl L., Bamberger I., Hansel A., Brilli F., Bahn M., Schmitt M., Tasser E., Wieser G., Tenhnen J., Tappeiner U., Cernusca A., Themeßl M., Peichl M. et al. (2011) Carbon, water and energy exchange in Alpine ecosystems. PhenoALP meeting, 12-14 October 2011, Aosta Valley, Italy.

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Irschick C., Carli E., Eliskases C., Frischmann S., Fritsch U., Gobiet A., Haas H., Kapelari S., Norz J., Themeßl M., Zebisch M., Wohlfahrt G. (2011) GrassClim - Interaktive Effekte von Klimawandel und Bewirtschaftung auf den Ertrag und die Kohlendioxidsenken/quellenstärke von Grünland. SparklingScience Tagung 2011.

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EGU 2011 Wohlfahrt G., Hammerle A., Bamberger I., Hansel A., Haslwanter A., Hörtnagl L. (2011) Breathing of the Biosphere: A decade of biosphere-atmosphere trace gas exchange research at the LTSER study site Meadow Neustift. 12.Österreichischer Klimatag, 21-22 September 2011, Vienna, Austria.

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EGU 2011 Wohlfahrt G., Hörtnagl L., Hammerle A., Haslwanter A., Hansel A., Loreto F., Brilli Federico (2011) Leaf and ecosystem response of mountain grassland gas exchange to drought. EGU2011-1317, European Geophysical Union 2011 General Assembly, 4-8 May 2011, Vienna, Austria.

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Wohlfahrt G., Hammerle A., Hörtnagl L., Irschick I., Haslwanter A. (2010) Trace gas fluxes from/to grassland: A decade of micrometeorological research at a hay meadow in the Stubai Valley/Austria. Invited oral presentation, 11 October 2010, ETH Zürich, Switzerland.

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Wohlfahrt G., Irschick C., Thalinger B., Hörtnagl L., Obojes N., Hammerle A. (2010) Multiple constraints on grassland evapotranspiration: implications for closing the energy balance. EGU2010-4210, European Geophysical Union 2010 General Assembly, 2–7 May 2010, Vienna, Austria.

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Wohlfahrt G., Pilloni S., Hörtnagl L., Hammerle A. (2010) Estimating carbon dioxide fluxes from temperate mountain grasslands using broad-band vegetation indices. COST action ES0903, 28-30 April 2010, Viote del Monte Bondone, Italy.

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Wohlfahrt G., Hörtnagl L., Haslwanter A., Hammerle A. (2010) Effects of management on the net ecosystem CO2 exchange of grasslands. SINKS project 7, Expert workshop, 4-5 March 2010, Kolding, Denmark.

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Hammerle A., Haslwanter A., Hörtnagl L., Wohlfahrt G. (2009) The net ecosystem CO2, H2O and energy exchange of mountain grasslands: methodology, controls and modelling. Invited oral presentation, 07 December 2009, ETH Zürich, Switzerland

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Wohlfahrt G., Hörtnagl L., Hammerle A. (2009) Grünland – Senke oder Quelle für Kohlendioxid: empirische Befunde und Modellanalysen. 4. Klimaseminar, LFZ Raumberg-Gumpenstein. 10 September 2009, Raumberg-Gumpenstein, Austria.

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Wohlfahrt G., Irschick C., Haslwanter A., Hammerle A. (2009) Regional variability of CO2, H2O and energy fluxes: a grassland case study in Tyrol/Austria. Transregional Collaborative Research Centre 32 International workshop, 8-10 June 2009, Aachen, Germany.

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Arnone J.A., Jasoni R.L., Larsen J.D., Fenstermaker L.F., Wohlfahrt G. and the DRI ET Team. Evapotranspiration from lowland native shrubland ecosystems in Nevada’s (USA) eastern Great Basin and its relationship to remotely sensed measures of vegetation. EGU2009-10643, European Geophysical Union 2009 General Assembly, 19–24 April 2009, Vienna, Austria.

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Wohlfahrt G., Hoertnagl L., Bamberger I., Schnitzhofer R., Dunkel J., Hammerle A., Graus M., Hansel A. (2009) Stress induced BVOC exchange from grassland. VOCBAS science meeting, 14-17 January 2009, Taagepera, Estonia.

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Hammerle A., Williams M., Wohlfahrt G. (2008) Carbon storage potential of a temperate mountain grassland as affected by management: a combined experimental and modelling analysis. Invited oral presentation, 26 September, Edinburgh, UK.

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Hammerle A., Wohlfahrt G. (2008) On using broad‑band vegetation indices to infer the net ecosystem CO2 exchange or Is the saturation problem a problem for CO2 fluxes ? SpecNet Europe Meeting, 30 June‑2 July 2008, Trento, Italy.

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Hammerle, A., Bahn, M., Tappeiner, U., Cernusca, A. Wohlfahrt, G. (2008) Carbon storage potential of a temperate mountain grassland as affected by management: a combined experimental and modeling analysis. EGU2008-A-01149, European Geophysical Union 2008 General Assembly, 13–18 April 2008, Vienna, Austria.

Wohlfahrt, G.; Fenstermaker, L.; Arnone, J. (2008) Large Annual Net Ecosystem CO2 Uptake of a Mojave Desert Ecosystem. EGU2008-A-01414, European Geophysical Union 2008 General Assembly, 13–18 April 2008, Vienna, Austria.

Haslwanter, A.; Hammerle, A.; Wohlfahrt, G. (2008) Open- vs. closed-path eddy covariance measurements of the net ecosystem carbon dioxide and water vapour exchange: a long-term perspective. EGU2008-A-01151, European Geophysical Union 2008 General Assembly, 13–18 April 2008, Vienna, Austria.

Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Tappeiner U., Cernusca A. (2008) Die Auswirkungen von Wetter und Bewirtschaftung auf die saisonale und inter-anuelle Variabilität des Nettoökosystemkohlendioxidaustschs einer Mähwiese. 10.Österreichischer Klimatag, 13-14 March 2008, Vienna, Austria.

Hammerle, A.; Haslwanter, A.; Tappeiner, U.; Cernusca, A.; Wohlfahrt, G. (2007) Energy Partitioning of a Mountain Meadow: Controls, seasonal and inter-annual Variability. EGU2007-A-01942, European Geophysical Union 2007 General Assembly, 15–20 April 2007, Vienna, Austria.

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Wohlfahrt, G.; Hammerle, A.; Haslwanter, A.; Bahn, M.; Tappeiner, U.; Cernusca, A. (2007) Carbon Balance Tradeoffs for Mountain Grasslands: Influence of Cutting Frequency and Growing Season Length on the Net Ecosystem CO2 Exchange. EGU2007-A-01268, European Geophysical Union 2007 General Assembly, 15–20 April 2007, Vienna, Austria.

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Wohlfahrt, G.; Arnone, J. (2007) Large Annual Net Ecosystem CO2 Uptake of a Mojave Desert Ecosystem. EGU2007-A-01266, European Geophysical Union 2007 General Assembly, 15–20 April 2007, Vienna, Austria

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Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Tappeiner U., Cernusca A. (2006) Opposing influence of land use and altitude on the net ecosystem CO2 exchange of two mountain grasslands. 91st Ecological Society of America Annual Meeting, 6-11 August 2006, Memphis, USA.

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Wohlfahrt G., Hammerle A., Haslwanter A., Bahn M., Cernusca A., Tappeiner U. (2006) Die Kohlendioxid-Senken/Quellenstärke Alpiner Graslandökosysteme und deren Beeinflussung durch Bewirtschaftungsmaßnahmen. 9.Österreichischer Klimatag, 16-17 March 2006, Vienna, Austria.

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Wohlfahrt G. and other CARBOMONT participants (2006) Biotic, abiotic and anthropogenic controls on the net ecosystem CO2 exchange of European mountain grasslands. EGU06-A-03025, European Geophysical Union 2006 General Assembly, 02–07 April 2006, Vienna, Austria.

Wohlfahrt G., Bahn M., Haslwanter A., Drösler M., Cernusca A. (2005) Challenges to estimating nocturnal CO2 fluxes in terrestrial ecosystems using micrometeorological, ecophysiological and modelling techniques. 90th ESA Annual Meeting, Montreal, Canada, 6-12 August 2005

 

Book chapters back to top

 

Wohlfahrt G., Cernusca A. (1999) Scaling up gas exchange from leaves to single plants. In Land-use changes in European Mountain ecosystems. ECOMONT – concepts and results (eds. A. Cernusca, U. Tappeiner & N. Bayfield). Blackwell, p. 191-194.

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Wohlfahrt G., Cernusca A. (1999) Modelling leaf gas exchange. In Land-use changes in European Mountain ecosystems. ECOMONT – concepts and results (eds. A. Cernusca, U. Tappeiner, N. Bayfield). Blackwell, p. 188-191.

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Cescatti A., Chemini C., De Siena C., Gianelle D., Nicolini G., Wohlfahrt G. (1999) Monte Bondone composite landscape, Italy. In Land-use changes in European Mountain ecosystems. ECOMONT – concepts and results (eds. A. Cernusca, U. Tappeiner, N. Bayfield). Blackwell, p. 60-73.

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Bahn M., Wohlfahrt G., Haubner E., Horak I., Michaeler W., Rottmar K., Tappeiner U., Cernusca A. (1999) Leaf gas exchange characteristics, nitrogen contents and specific leaf area of 30 grassland species in differently managed mountain ecosystems in the Eastern Alps. In Land-use changes in European Mountain ecosystems. ECOMONT – concepts and results (eds. A. Cernusca, U. Tappeiner, N. Bayfield). Blackwell, p. 247-255.

 

Abstracts back to top

 

Wohlfahrt G., Bahn M., Haslwanter A., Drösler M., Cernusca A. (2005) Challenges to estimating nocturnal CO2 fluxes in terrestrial ecosystems using micrometeorological, ecophysiological and modelling techniques. 90th Ecological Socienty of America Annual Meeting, 6-12 August 2004, Montreal, Canada.

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Wohlfahrt G., Bahn M., Haslwanter A., Newesely Ch., Cernusca A. (2005) Estimation of Daytime Ecosystem Respiration to determine Gross Primary Production of a Mountain Meadow. European Geophysical Union 2005 General Assembly, 24–29 April 2005, Vienna, Austria.

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Hammerle A., Wohlfahrt G., Schmitt M., Haslwanter A., Bahn M., Cernusca A. (2005) Eddy covariance measurements on a steep mountain slope. European Geophysical Union 2005 General Assembly, 24–29 April 2005, Vienna, Austria.

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Wohlfahrt G., Anfang Ch., Bahn M., Haslwanter A., Schmitt M., Drösler M., Pfadenhauer J., Cernusca A. (2004) Quantifying nighttime ecosystem respiration of a meadow using eddy covariance, chambers and modelling. Fluxnet 2004 Open workshop, 13-15 December 2004, Firenze, Italy.

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Wohlfahrt G., Anfang Ch., Bahn M., Cernusca A., Haslwanter A., Schmitt M. (2004) Quantifying ecosystem respiration of a mountain meadow: a multiple constraints approach using eddy covariance, chambers and modelling. European Geophysical Union 1st general assembly, 25–30 April 2004, Nice, France.

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Wohlfahrt G., Anfang Ch., Bahn M., Bianchi K., Haslwanter A., Newesely Ch., Rubatscher D., Wurm E., Cernusca A. (2003) How complex do canopy microclimate models need to be? A comparison of three Lagrangian dispersion models of differing complexity. ILEAPS: International Open Science Conference, 29 September – 3 October 2003, Helsinki, Finnland.

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Wohlfahrt G., Bahn M., Haslwanter A., Newesely Ch., Cernusca A. (2003) Net ecosystem CO2 exchange of mountain grasslands differing in land use. AGU Chapman conference on Ecosystem Interactions with Land Use Change, 14-18 June 2003, Santa Fe, USA.

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Wohlfahrt G., Anfang Ch., Haslwanter A., Cernusca A. (2002) Effects of mowing on the CO2, H2O and energy exchange of a mountain meadow. FLUXNET synthesis meeting, 20-22 June 2002, Orvieto, Italy.

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Wohlfahrt G., Cernusca A. (2001) Momentum transfer by a mountain meadow canopy: a simulation analysis based on Massman’s (1997) model. AGU fall meeting 2001, 10-14 December 2001, San Francisco, USA.

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Wohlfahrt G., Bahn M., Newesely Ch., Sapinsky S., Tappeiner U., Cernusca A. (2001) Canopy structure versus physiology effects on net photosynthesis of mountain grasslands differing in land use. 3rd European Ecological Modelling Conference, 10-15 September 2001, Dubrovnik, Croatia.

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Wohlfahrt G., Bahn M., Newesely Ch., Sapinsky S., Tappeiner U., Cernusca A. (2001) Canopy structure versus physiology effects on net photosynthesis of mountain grasslands differing in land use. 86th Annual meeting of the Ecological Society of America, 5‑10 August 2001, Madison, USA.

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Wohlfahrt G., Bahn M., Newesely Ch., Sapinsky S., Tappeiner U., Cernusca A. (2001) Canopy structure versus physiology effects on net photosynthesis of mountain grasslands differing in land use. 44th IAVS Symposium, 29 July-4 August 2001, Freising-Weinstepan, Germany.

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Wohlfahrt G., Bahn M., Tappeiner U., Cernusca A. (1999) A model of whole plant gas exchange and its application to herbaceous plant species from differently managed mountain grassland ecosystems. Annual meeting of the North American Chapter of the ISEM, 7-12 August 1999, Spokane, USA.

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Wohlfahrt G., Bahn M., Haubner E., Horak I., Köck M., Michaeler W., Rottmar K., Tappeiner U., Cernusca A. (1998) The gas exchange of plants as affected by land use: a simulation study. 7th International Congress of Ecology (INTECOL), 19-25 July 1998, Florence, Italy.

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Wohlfahrt G., Horak I., Bahn M., Tappeiner U., Cernusca A. (1997) Modelling carbon dioxide and water vapour gas exchange in context with land-use changes. Leaf model parameterisation. 1st European Ecological Modelling Conference, 16-19 September 1997, Pula, Croatia.