How is water-use efficiency of terrestrial ecosystems distributed and changing on Earth?
A better understanding of ecosystem water-use efficiency (WUE) will help us improve ecosystem management for mitigation as well as adaption to global hydrological change. Here, long-term flux tower observations of productivity and evapotranspiration allow us to detect a consistent latitudinal trend...
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creator | Tang, Xuguang Li, Hengpeng Desai, Ankur R. Nagy, Zoltan Luo, Juhua Kolb, Thomas E. Olioso, Albert Xu, Xibao Yao, Li Kutsch, Werner Pilegaard, Kim Köstner, Barbara Ammann, Christof |
description | A better understanding of ecosystem water-use efficiency (WUE) will help us improve ecosystem management for mitigation as well as adaption to global hydrological change. Here, long-term flux tower observations of productivity and evapotranspiration allow us to detect a consistent latitudinal trend in WUE, rising from the subtropics to the northern high-latitudes. The trend peaks at approximately 51°N and then declines toward higher latitudes. These ground-based observations are consistent with global-scale estimates of WUE. Global analysis of WUE reveals existence of strong regional variations that correspond to global climate patterns. The latitudinal trends of global WUE for Earth's major plant functional types reveal two peaks in the Northern Hemisphere not detected by ground-based measurements. One peak is located at 20° ~ 30°N and the other extends a little farther north than 51°N. Finally, long-term spatiotemporal trend analysis using satellite-based remote sensing data reveals that land-cover and land-use change in recent years has led to a decline in global WUE. Our study provides a new framework for global research on the interactions between carbon and water cycles as well as responses to natural and human impacts. |
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Here, long-term flux tower observations of productivity and evapotranspiration allow us to detect a consistent latitudinal trend in WUE, rising from the subtropics to the northern high-latitudes. The trend peaks at approximately 51°N and then declines toward higher latitudes. These ground-based observations are consistent with global-scale estimates of WUE. Global analysis of WUE reveals existence of strong regional variations that correspond to global climate patterns. The latitudinal trends of global WUE for Earth's major plant functional types reveal two peaks in the Northern Hemisphere not detected by ground-based measurements. One peak is located at 20° ~ 30°N and the other extends a little farther north than 51°N. Finally, long-term spatiotemporal trend analysis using satellite-based remote sensing data reveals that land-cover and land-use change in recent years has led to a decline in global WUE. Our study provides a new framework for global research on the interactions between carbon and water cycles as well as responses to natural and human impacts.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/srep07483</identifier><identifier>PMID: 25500908</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>631/449/2668 ; 704/158/2445 ; 704/445/242 ; Carbon - metabolism ; Carbon cycle ; Climate ; Earth (Planet) ; Ecosystem ; Ecosystem management ; Environmental Sciences ; Evapotranspiration ; Global Changes ; Global climate ; Humanities and Social Sciences ; Humans ; Hydrologic cycle ; Land use ; Latitude ; multidisciplinary ; Remote sensing ; Science ; Terrestrial ecosystems ; Trends ; Water - metabolism ; Water Supply ; Water use</subject><ispartof>Scientific reports, 2014-12, Vol.4 (1), p.7483-7483, Article 7483</ispartof><rights>The Author(s) 2014</rights><rights>Copyright Nature Publishing Group Dec 2014</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><rights>Copyright © 2014, Macmillan Publishers Limited. 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subjects | 631/449/2668 704/158/2445 704/445/242 Carbon - metabolism Carbon cycle Climate Earth (Planet) Ecosystem Ecosystem management Environmental Sciences Evapotranspiration Global Changes Global climate Humanities and Social Sciences Humans Hydrologic cycle Land use Latitude multidisciplinary Remote sensing Science Terrestrial ecosystems Trends Water - metabolism Water Supply Water use |
title | How is water-use efficiency of terrestrial ecosystems distributed and changing on Earth? |
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