Global patterns, trends, and drivers of water use efficiency from 2000 to 2013
文献类型：期刊论文
| 作者 | Xue, Bao-Lin; Guo, Qinghua2 ; Otto, Alvarez2; Xiao, Jingfeng1; Tao, Shengli; Li, Le
|
| 刊名 | ECOSPHERE
 |
| 出版日期 | 2015 |
| 卷号 | 6期号:10 |
| 关键词 | leaf area index precipitation solar radiation specific humidity temperature water use efficiency |
| ISSN号 | 2150-8925 |
| DOI | 10.1890/ES14-00416.1 |
| 文献子类 | Article |
| 英文摘要 | Water use efficiency (WUE; gross primary production [GPP]/evapotranspiration [ET]) estimates the tradeoff between carbon gain and water loss during photosynthesis and is an important link of the carbon and water cycles. Understanding the spatiotemporal patterns and drivers of WUE is helpful for projecting the responses of ecosystems to climate change. Here we examine the spatiotemporal patterns, trends, and drivers of WUE at the global scale from 2000 to 2013 using the gridded GPP and ET data derived from the Moderate Resolution Imaging Spectroradiometer (MODIS). Our results show that the global WUE has an average value of 1.70 g C/kg H2O with large spatial variability during the 14-year period. WUE exhibits large variability with latitude. WUE also varies much with elevation: it first remains relatively constant as the elevation varies from 0 to 1000 m and then decreases dramatically. WUE generally increases as precipitation and specific humidity increase; whereas it decreases after reaching maxima as temperature and solar radiation increases. In most land areas, the temporal trend of WUE is positively correlated with precipitation and specific humidity over the 14-year period; while it has a negative relationship with temperature and solar radiation related to global warming and dimming. On average, WUE shows an increasing trend of 0.0025 g C.kg(-1) H2O.yr(-1) globally. Our global-scale assessment of WUE has implications for improving our understanding of the linkages between the water and carbon cycles and for better projecting the responses of ecosystems to climate change. |
| 学科主题 | Ecology |
| 出版地 | HOBOKEN |
| WOS关键词 | REFLECTANCE DISTRIBUTION FUNCTION ; CONTERMINOUS UNITED-STATES ; NET PRIMARY PRODUCTION ; CARBON-DIOXIDE ; VAPOR EXCHANGE ; ECOSYSTEM PRODUCTIVITY ; TERRESTRIAL ECOSYSTEMS ; ENVIRONMENTAL CONTROLS ; ALBEDO RETRIEVALS ; MODIS |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000364024300003 |
| 出版者 | WILEY |
| 资助机构 | National Key Basic Research Program of China [2013CB956604] ; National Science Foundation of China [41301020, 31270563] ; National Aeronautics and Space Administration through the Carbon Cycle Science Program [NNX14AJ18G] ; National Aeronautics and Space Administration through the Terrestrial Ecology Program [NNX12AK56G] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/25968]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Univ Calif Merced, Sch Engn, Sierra Nevada Res Inst, Merced, CA 95343 USA 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 3.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA |
| 推荐引用方式 GB/T 7714 | Xue, Bao-Lin,Guo, Qinghua,Otto, Alvarez,et al. Global patterns, trends, and drivers of water use efficiency from 2000 to 2013[J]. ECOSPHERE,2015,6(10). |
| APA | Xue, Bao-Lin,Guo, Qinghua,Otto, Alvarez,Xiao, Jingfeng,Tao, Shengli,&Li, Le.(2015).Global patterns, trends, and drivers of water use efficiency from 2000 to 2013.ECOSPHERE,6(10). |
| MLA | Xue, Bao-Lin,et al."Global patterns, trends, and drivers of water use efficiency from 2000 to 2013".ECOSPHERE 6.10(2015). |
入库方式： OAI收割
来源：植物研究所
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