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Ecosystem water‐use efficiency (EWUE) is an indicator of carbon–water interactions and is defined as the ratio of carbon assimilation (GPP) to evapotranspiration (ET). Previous research suggests an increasing long‐term trend in annual EWUE over many regions and is largely attributed to the physiological effects of rising CO2. The seasonal trends in EWUE, however, have not yet been analyzed. In this...
Aim
To investigate how ecosystem water‐use efficiency (WUE) varies spatially under different climate conditions, and how spatial variations in WUE differ from those of transpiration‐based water‐use efficiency (WUEt) and transpiration‐based inherent water‐use efficiency (IWUEt).
Location
Global terrestrial ecosystems.
Methods
We investigated spatial patterns of WUE using two datasets of gross...
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