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  • 1
    Publication Date: 2010-10-12
    Description: More than half of the solar energy absorbed by land surfaces is currently used to evaporate water. Climate change is expected to intensify the hydrological cycle 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, meteorological and remote-sensing observations, and a machine-learning algorithm. 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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jung, Martin -- Reichstein, Markus -- Ciais, Philippe -- Seneviratne, Sonia I -- Sheffield, Justin -- Goulden, Michael L -- Bonan, Gordon -- Cescatti, Alessandro -- Chen, Jiquan -- de Jeu, Richard -- Dolman, A Johannes -- Eugster, Werner -- Gerten, Dieter -- Gianelle, Damiano -- Gobron, Nadine -- Heinke, Jens -- Kimball, John -- Law, Beverly E -- Montagnani, Leonardo -- Mu, Qiaozhen -- Mueller, Brigitte -- Oleson, Keith -- Papale, Dario -- Richardson, Andrew D -- Roupsard, Olivier -- Running, Steve -- Tomelleri, Enrico -- Viovy, Nicolas -- Weber, Ulrich -- Williams, Christopher -- Wood, Eric -- Zaehle, Sonke -- Zhang, Ke -- England -- Nature. 2010 Oct 21;467(7318):951-4. doi: 10.1038/nature09396.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute for Biogeochemistry, 07745 Jena, Germany. mjung@bgc-jena.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20935626" target="_blank"〉PubMed〈/a〉
    Keywords: Artificial Intelligence ; Atmosphere/*chemistry ; Fresh Water/*analysis ; *Global Warming/statistics & numerical data ; History, 20th Century ; History, 21st Century ; Humidity ; Plant Transpiration/*physiology ; Reproducibility of Results ; Seasons ; Soil/analysis ; Uncertainty ; Volatilization ; *Water Cycle
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2015-06-13
    Description: Jaramillo and Destouni claim that freshwater consumption is beyond the planetary boundary, based on high estimates of water cycle components, different definitions of water consumption, and extrapolation from a single case study. The difference from our analysis, based on mainstream assessments of global water consumption, highlights the need for clearer definitions of water cycle components and improved models and databases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gerten, Dieter -- Rockstrom, Johan -- Heinke, Jens -- Steffen, Will -- Richardson, Katherine -- Cornell, Sarah -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):1217. doi: 10.1126/science.aab0031. Epub 2015 Jun 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Domain of Earth System Analysis, Potsdam Institute for Climate Impact Research, 14473 Potsdam, Germany. gerten@pik-potsdam.de. ; Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. ; Research Domain of Earth System Analysis, Potsdam Institute for Climate Impact Research, 14473 Potsdam, Germany. International Livestock Research Institute, Nairobi, 00100 Kenya. Commonwealth Scientific and Industrial Research Organization, St. Lucia, QLD 4067, Australia. ; Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. Fenner School of Environment and Society, The Australian National University, Canberra, ACT 2601, Australia. ; Center for Macroecology, Evolution, and Climate, University of Copenhagen, Natural History Museum of Denmark, 2100 Copenhagen, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26068844" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; *Climate Change ; *Earth (Planet) ; Humans ; *Ozone Depletion
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2015-01-17
    Description: The planetary boundaries framework defines a safe operating space for humanity based on the intrinsic biophysical processes that regulate the stability of the Earth system. Here, we revise and update the planetary boundary framework, with a focus on the underpinning biophysical science, based on targeted input from expert research communities and on more general scientific advances over the past 5 years. Several of the boundaries now have a two-tier approach, reflecting the importance of cross-scale interactions and the regional-level heterogeneity of the processes that underpin the boundaries. Two core boundaries-climate change and biosphere integrity-have been identified, each of which has the potential on its own to drive the Earth system into a new state should they be substantially and persistently transgressed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steffen, Will -- Richardson, Katherine -- Rockstrom, Johan -- Cornell, Sarah E -- Fetzer, Ingo -- Bennett, Elena M -- Biggs, Reinette -- Carpenter, Stephen R -- de Vries, Wim -- de Wit, Cynthia A -- Folke, Carl -- Gerten, Dieter -- Heinke, Jens -- Mace, Georgina M -- Persson, Linn M -- Ramanathan, Veerabhadran -- Reyers, Belinda -- Sorlin, Sverker -- New York, N.Y. -- Science. 2015 Feb 13;347(6223):1259855. doi: 10.1126/science.1259855. Epub 2015 Jan 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. Fenner School of Environment and Society, The Australian National University, Canberra, ACT 2601, Australia. will.steffen@anu.edu.au. ; Center for Macroecology, Evolution, and Climate, University of Copenhagen, Natural History Museum of Denmark, Universitetsparken 15, Building 3, 2100 Copenhagen, Denmark. ; Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. ; Department of Natural Resource Sciences and McGill School of Environment, McGill University, 21, 111 Lakeshore Road, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada. ; Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. Centre for Studies in Complexity, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa. ; Center for Limnology, University of Wisconsin, 680 North Park Street, Madison WI 53706 USA. ; Alterra Wageningen University and Research Centre, P.O. Box 47, 6700AA Wageningen, Netherlands. Environmental Systems Analysis Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, Netherlands. ; Department of Environmental Science and Analytical Chemistry, Stockholm University, 10691 Stockholm, Sweden. ; Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. Beijer Institute of Ecological Economics, Royal Swedish Academy of Sciences, SE-10405 Stockholm, Sweden. ; Research Domain Earth System Analysis, Potsdam Institute for Climate Impact Research (PIK), Telegraphenberg A62, 14473 Potsdam, Germany. ; Research Domain Earth System Analysis, Potsdam Institute for Climate Impact Research (PIK), Telegraphenberg A62, 14473 Potsdam, Germany. International Livestock Research Institute, P.O. Box 30709, Nairobi, 00100 Kenya. CSIRO (Commonwealth Scientific and Industrial Research Organization), St. Lucia, QLD 4067, Australia. ; Centre for Biodiversity and Environment Research (CBER), Department of Genetics, Evolution and Environment, University College London, Gower Street, London WC1E 6BT, UK. ; Stockholm Environment Institute, Linnegatan 87D, SE-10451 Stockholm, Sweden. ; Scripps Institution of Oceanography, University of California at San Diego, 8622 Kennel Way, La Jolla, CA 92037 USA. TERI (The Energy and Resources Institute) University, 10 Institutional Area, Vasant Kunj, New Delhi, Delhi 110070, India. ; Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden. Natural Resources and the Environment, CSIR, P.O. Box 320, Stellenbosch 7599, South Africa. ; Division of History of Science, Technology and Environment, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25592418" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Biological Evolution ; *Climate Change ; *Earth (Planet) ; Fresh Water ; Humans ; *Ozone Depletion
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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