Journal article
How is water-use efficiency of terrestrial ecosystems distributed and changing on Earth?
Chinese Academy of Sciences1
Dresden University of Technology2
Agroscope3
University of Wisconsin-Madison4
Hungarian University of Agriculture and Life Sciences5
Northern Arizona University6
Environnement Méditerranéen et Modélisation des AgroHydrosystème7
Northeast Normal University8
University of Helsinki9
Department of Chemical and Biochemical Engineering, Technical University of Denmark10
Ecosystems Programme, Department of Chemical and Biochemical Engineering, Technical University of Denmark11
...and 1 moreA 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 degrees 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 degrees similar to 30 degrees N and the other extends a little farther north than 51 degrees 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.
Language: | English |
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Publisher: | Nature Publishing Group |
Year: | 2015 |
Pages: | 7483 |
ISSN: | 20452322 |
Types: | Journal article |
DOI: | 10.1038/srep07483 |
ORCIDs: | Pilegaard, Kim |
07502, Ecology: environmental biology - General and methods AMERIFLUX DATA CARBON-DIOXIDE CO2 EVAPOTRANSPIRATION EXCHANGE Ecology, Environmental Sciences FLUXES FORESTS GLOBAL-SCALE MODIS MULTIDISCIPLINARY Primates Mammalia Vertebrata Chordata Animalia (Animals, Chordates, Humans, Mammals, Primates, Vertebrates) - Hominidae [86215] human common SDG 13 - Climate Action SDG 15 - Life on Land Terrestrial Ecology UNITED-STATES carbon 7440-44-0 carbon-water interaction ecosystem evapotranspiration ecosystem productivity global climate pattern latitude effect long-term flux tower observation applied and field techniques satellite-based remote sensing data terrestrial ecosystem water-use efficiency
Carbon Climate Earth, Planet Ecosystem Humans Water Water Supply