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  Recent decline in the global land evapotranspiration trend due to limited moisture supply

Jung, M., Reichstein, M., Ciais, P., Seneviratne, S. I., Sheffield, J., Goulden, M. L., et al. (2010). Recent decline in the global land evapotranspiration trend due to limited moisture supply. Nature, 467(7318), 951-954. doi:10.1038/nature09396.

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Jung, M.1, Autor           
Reichstein, M.1, Autor           
Ciais, P., Autor
Seneviratne, S. I., Autor
Sheffield, J., Autor
Goulden, M. L., Autor
Bonan, G., Autor
Cescatti, A., Autor
Chen, J. Q., Autor
De Jeu, R., Autor
Dolman, A. J., Autor
Eugster, W., Autor
Gerten, D., Autor
Gianelle, D., Autor
Gobron, N., Autor
Heinke, J., Autor
Kimball, J., Autor
Law, B. E., Autor
Montagnani, L., Autor
Mu, Q. Z., Autor
Mueller, B., AutorOleson, K., AutorPapale, D., AutorRichardson, A. D., AutorRoupsard, O., AutorRunning, S., AutorTomelleri, E.1, Autor           Viovy, N., AutorWeber, U.1, Autor           Williams, C., AutorWood, E., AutorZaehle, Sönke2, Autor           Zhang, K., Autor mehr..
Affiliations:
1Research Group Biogeochemical Model-data Integration, Dr. M. Reichstein, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497760              
2Terrestrial Biosphere Modelling , Dr. Sönke Zähle, Department Biogeochemical Integration, Prof. Dr. Martin Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497787              

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Schlagwörter: validation biosphere products climate impact cycle
 Zusammenfassung: More than half of the solar energy absorbed by land surfaces is currently used to evaporate water(1). Climate change is expected to intensify the hydrological cycle(2) and to alter evapotranspiration, with implications for ecosystem services and feedback to regional and global climate. Evapotranspiration changes may already be under way, but direct observational constraints are lacking at the global scale. Until such evidence is available, changes in the water cycle on land-a key diagnostic criterion of the effects of climate change and variability-remain uncertain. Here we provide a data-driven estimate of global land evapotranspiration from 1982 to 2008, compiled using a global monitoring network(3), meteorological and remote-sensing observations, and a machine-learning algorithm(4). In addition, we have assessed evapotranspiration variations over the same time period using an ensemble of process-based land-surface-models. Our results suggest that global annual evapotranspiration increased on average by 7.1 +/- 1.0 millimetres per year per decade from 1982 to 1997. After that, coincident with the last major El Nino event in 1998, the global evapotranspiration increase seems to have ceased until 2008. This change was driven primarily by moisture limitation in the Southern Hemisphere, particularly Africa and Australia. In these regions, microwave satellite observations indicate that soil moisture decreased from 1998 to 2008. Hence, increasing soil-moisture limitations on evapotranspiration largely explain the recent decline of the global land-evapotranspiration trend. Whether the changing behaviour of evapotranspiration is representative of natural climate variability or reflects a more permanent reorganization of the land water cycle is a key question for earth system science.

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Sprache(n): eng - English
 Datum: 2010
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
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 Identifikatoren: DOI: 10.1038/nature09396
Anderer: BGC1407
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Titel: Nature
  Kurztitel : Nature
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 467 (7318) Artikelnummer: - Start- / Endseite: 951 - 954 Identifikator: ISSN: 0028-0836
CoNE: https://pure.mpg.de/cone/journals/resource/954925427238