Arid
DOI10.1007/s12040-015-0587-4
Water use efficiency of net primary production in global terrestrial ecosystems
Xia, Lei1,2; Wang, Fei1,2,3; Mu, Xingmin1,2,3; Jin, Kai3; Sun, Wenyi1,3; Gao, Peng1,2,3; Zhao, Guangju1,2,3
通讯作者Wang, Fei
来源期刊JOURNAL OF EARTH SYSTEM SCIENCE
ISSN0253-4126
EISSN0973-774X
出版年2015
卷号124期号:5页码:921-931
英文摘要

The carbon and water cycles of terrestrial ecosystems, which are strongly coupled via water use efficiency (WUE), are influenced by global climate change. To explore the relationship between the carbon and water cycles and predict the effect of climate change on terrestrial ecosystems, it is necessary to study the WUE in global terrestrial ecosystems. In this study, the 13-year WUE (i.e., net primary production (NPP)/evapotranspiration (ET)) of global terrestrial ecosystems was calculated based on the Moderate Resolution Imaging Spectro-radiometer (MODIS) NPP (MOD17A3) and ET (MOD16A3) products from 2000 to 2012. The results indicate that the annual average WUE decreased but not significantly, and the 13-year mean value was 868.88 mg C m (-2) mm (-1). The variation trend of WUE value for each pixel differed greatly across the terrestrial ecosystems. A significant variation (P < 0.05) occurred in about 18.50% of the land surface. WUE was spatially distributed from 0 to 2541 mg C m (-2) mm (-1), and 58.78% of the WUE values were concentrated in the interval of 600-1200 mg C m (-2) mm (-1). The WUE increased from north to south in Africa and Oceania and from east to west in Europe and South America. Both latitudinal and longitudinal gradients existed in Asia and North America. The following trends in the WUE of different continents and Koppen-Geiger climates were observed: Europe (1129.71 mg C m (-2) mm (-1))> Oceania (1084.46 mg C m (-2) mm (-1))> Africa (893.51 mg C m (-2) mm (-1))> South America (893.07 mg C m (-2) mm (-1))> North America (870.79 mg C m (-2) mm (-1))> Asia (738.98 mg C m (-2) mm (-1)) and warm temperate climates (1094 mg C m (-2) mm (-1))> snowy climates (862 mg C m (-2) mm (-1))> arid climates (785 mg C m (-2) mm (-1))> equatorial climates (732 mg C m (-2) mm (-1))> polar climates (435 mg C m (-2) mm (-1)). Based on the WUE value and the present or future rainfall, the maximum carbon that fixed in one region may be theoretically calculated. Also, under the background of global climatic change, WUE may be regarded as an important reference for allotting CO (2) emissions offsets and carbon transactions.


英文关键词Water use efficiency global terrestrial ecosystems MODIS net primary production evapotranspiration Koppen-Geiger climate classification
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000358329700002
WOS关键词DROUGHT-INDUCED REDUCTION ; CLIMATE-CHANGE ; CARBON-DIOXIDE ; MODIS DATA ; LAND-USE ; EVAPOTRANSPIRATION ; CLASSIFICATION ; NPP ; IMPROVEMENTS ; RESOURCES
WOS类目Geosciences, Multidisciplinary ; Multidisciplinary Sciences
WOS研究方向Geology ; Science & Technology - Other Topics
来源机构西北农林科技大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188526
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China;
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
3.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714
Xia, Lei,Wang, Fei,Mu, Xingmin,et al. Water use efficiency of net primary production in global terrestrial ecosystems[J]. 西北农林科技大学,2015,124(5):921-931.
APA Xia, Lei.,Wang, Fei.,Mu, Xingmin.,Jin, Kai.,Sun, Wenyi.,...&Zhao, Guangju.(2015).Water use efficiency of net primary production in global terrestrial ecosystems.JOURNAL OF EARTH SYSTEM SCIENCE,124(5),921-931.
MLA Xia, Lei,et al."Water use efficiency of net primary production in global terrestrial ecosystems".JOURNAL OF EARTH SYSTEM SCIENCE 124.5(2015):921-931.
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