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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
2015-07-01
Source PublicationJOURNAL OF EARTH SYSTEM SCIENCE
Volume124Issue:5Pages:921-931
AbstractThe 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.
SubtypeArticle
KeywordWater Use Efficiency Global Terrestrial Ecosystems Modis Net Primary Production Evapotranspiration Koppen-geiger Climate Classification
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedGeology ; Science & Technology - Other Topics
WOS KeywordDROUGHT-INDUCED REDUCTION ; CLIMATE-CHANGE ; CARBON-DIOXIDE ; MODIS DATA ; LAND-USE ; EVAPOTRANSPIRATION ; CLASSIFICATION ; NPP ; IMPROVEMENTS ; VEGETATION
Indexed BySCI
Language英语
WOS SubjectGeosciences, Multidisciplinary ; Multidisciplinary Sciences
WOS IDWOS:000358329700002
PublisherINDIAN ACAD SCIENCES
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/67882
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Fei
Affiliation1.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
Recommended Citation
GB/T 7714
Xia, Lei,Wang, Fei,Mu, Xingmin,et al. Water use efficiency of net primary production in global terrestrial ecosystems[J]. JOURNAL OF EARTH SYSTEM SCIENCE,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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