Water use efficiency of net primary production in global terrestrial ecosystems
作者： Lei Xia , Fei Wang , Xingmin Mu , Kai Jin , Wenyi Sun
DOI: 10.1007/S12040-015-0587-4
关键词: Water-use efficiency 、 Environmental science 、 Atmospheric sciences 、 Temperate climate 、 Terrestrial ecosystem 、 Water cycle 、 Global warming 、 Climatology 、 Arid 、 Primary production 、 Evapotranspiration
摘要: The carbon and water cycles of terrestrial ecosystems, which are strongly coupled via use efficiency (WUE), influenced by global climate change. To explore the relationship between predict effect change on it is necessary to study WUE in ecosystems. In this study, 13-year (i.e., net primary production (NPP)/evapotranspiration (ET)) ecosystems was calculated based Moderate Resolution Imaging Spectro-radiometer (MODIS) NPP (MOD17A3) ET (MOD16A3) products from 2000 2012. results indicate that annual average decreased but not significantly, mean value 868.88 mg C m −2 mm −1. variation trend for each pixel differed greatly across A significant (P Oceania (1084.46 −1)> Africa (893.51 South America (893.07 North (870.79 Asia (738.98 −1) warm temperate climates (1094 snowy (862 arid (785 equatorial (732 polar (435 −1). Based present or future rainfall, maximum fixed one region may be theoretically calculated. Also, under background climatic change, regarded as an important reference allotting CO 2 emissions offsets transactions.
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