中国东部南北样带森林生态系统蒸腾与蒸散比值估算（英文）

编号 zgly0001683637

文献类型 期刊论文

文献题名 中国东部南北样带森林生态系统蒸腾与蒸散比值估算（英文）

作者 任小丽  路倩倩  何洪林  张黎  牛忠恩 

作者单位 KeyLaboratoryofEcosystemNetworkObservationandModeling  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  ZhongkeTongde(Beijing)EcologyTechnologyCo.  CollegeofResourcesandEnvironment  UniversityofChineseAcademyofScience 

母体文献 Journal of Geographical Sciences 

年卷期 2019年11期

年份 2019 

分类号 S718.5 

关键词 TheNorth-SouthTransectofEastChina(NSTEC)  forestecosystems  ratiooftranspirationtoevapotranspiration(T/ET)  wateruseefficiency(WUE) 

文摘内容 The ratio of transpiration to evapotranspiration(T/ET) is a key parameter for quantifying water use efficiency of ecosystems and understanding the interaction between ecosystem carbon uptake and water cycling in the context of global change. The estimation of T/ET has been paid increasing attention from the scientific community in recent years globally. In this paper, we used the Priestly-Taylor Jet Propulsion Laboratory Model(PT-JPL) driven by regional remote sensing data and gridded meteorological data, to simulate the T/ET in forest ecosystems along the North-South Transect of East China(NSTEC) during 2001–2010, and to analyze the spatial distribution and temporal variation of T/ET, as well as the factors influencing the variation in T/ET. The results showed that:(1) The PT-JPL model is suitable for the simulation of evapotranspiration and its components of forest ecosystems in Eastern China, and has relatively good stability and reliability.(2) Spatial distribution of T/ET in forest ecosystems along NSTEC was heterogeneous, i.e., T/ET was higher in the north and lower in the south, with an averaged value of 0.69; and the inter-annual variation of T/ET showed a significantly increasing trend, with an increment of 0.007/yr(p<0.01).(3) Seasonal and inter-annual variations of T/ET had different dominant factors. Temperature and EVI can explain around 90%(p<0.01) of the seasonal variation in T/ET, while the inter-annual variation in T/ET was mainly controlled by EVI(53%, p<0.05).