Assessing spatio-temporal variations of precipitation-use efficiency over Tibetan grasslands using MODIS and in-situ observations
文献类型：期刊论文
| 作者 | Liu, Zhengjia1; Huang, Mei1 |
| 刊名 | FRONTIERS OF EARTH SCIENCE
 |
| 出版日期 | 2016 |
| 卷号 | 10期号:4页码:784-793 |
| 关键词 | PEARL RIVER DELTA PARTICULATE MATTER AIR-POLLUTION AEROSOL CHINA PM2.5 TRENDS FUTURE WINTER MODIS |
| 通讯作者 | Huang, M (reprint author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China. |
| 英文摘要 | Clarifying the spatial and temporal variations in precipitation-use efficiency (PUE) is helpful for advancing our knowledge of carbon and water cycles in Tibetan grassland ecosystems. Here we use an integrated remote sensing normalized difference vegetation index (NDVI) and in-situ above-ground net primary production (ANPP) measurements to establish an empirical exponential model to estimate spatial ANPP across the entire Tibetan Plateau. The spatial and temporal variations in PUE (the ratio of ANPP to mean annual precipitation (MAP)), as well as the relationships between PUE and other controls, were then investigated during the 2001-2012 study period. At a regional scale, PUE increased from west to east. PUE anomalies increased significantly (> 0.1 g center dot m(-2)center dot mm(-1)/10 yr) in the southern areas of the Tibetan Plateau yet decreased (> 0.02 g center dot m(-2)center dot mm(-1)/10 yr) in the northeastern areas. For alpine meadow, we obtained an obvious breaking point in trend of PUE against elevation gradients at 3600 m above the sea level, which showed a contrasting relationship. At the inter-annual scale, PUE anomalies were smaller in alpine steppe than in alpine meadow. The results show that PUE of Tibetan grasslands is generally high in dry years and low in wet years. |
| 学科主题 | Geology |
| 类目[WOS] | Geosciences, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000387866300016 |
| 源URL | [http://ir.radi.ac.cn/handle/183411/39471]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zhengjia,Huang, Mei. Assessing spatio-temporal variations of precipitation-use efficiency over Tibetan grasslands using MODIS and in-situ observations[J]. FRONTIERS OF EARTH SCIENCE,2016,10(4):784-793. |
| APA | Liu, Zhengjia,&Huang, Mei.(2016).Assessing spatio-temporal variations of precipitation-use efficiency over Tibetan grasslands using MODIS and in-situ observations.FRONTIERS OF EARTH SCIENCE,10(4),784-793. |
| MLA | Liu, Zhengjia,et al."Assessing spatio-temporal variations of precipitation-use efficiency over Tibetan grasslands using MODIS and in-situ observations".FRONTIERS OF EARTH SCIENCE 10.4(2016):784-793. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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