Responses of land evapotranspiration to Earth&apos;s greening in CMIP5 Earth   System Models

doi:10.1088/1748-9326/11/10/104006

CORC > 北京大学 > 城市与环境学院

	Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models
	Zeng, Zhenzhong ; Zhu, Zaichun ; Lian, Xu ; Li, Laurent Z. X. ; Chen, Anping ; He, Xiaogang ; Piao, Shilong
刊名	ENVIRONMENTAL RESEARCH LETTERS
	2016
关键词	evapotranspiration sensitivity to greening Earth greening leaf area index land-climate interaction Earth System Modelling LEAF-AREA INDEX NORTHERN ECOSYSTEMS FOREST GROWTH CLIMATE CARBON WATER TRANSPIRATION VARIABILITY SENSITIVITY EXCHANGE
DOI	10.1088/1748-9326/11/10/104006
英文摘要	Satellite-observed Earth's greening has been reproduced by the latest generation of Earth System Models (ESMs) participating in the Coupled Model Intercomparison Project Phase 5 (CMIP5). Land evapotranspiration (ET) is expected to rise with increasing leaf area index (LAI, Earth's greening). The responses of ET play a key role in the land-climate interaction, but they have not been evaluated previously. Here, we assessed the responses of ET to Earth's greening in these CMIP5 ESMs. We verified a significant and positive response of ET to the modeled greening in each model. However, the responses were not comparable across the ESMs because of an inherent bias in the sensitivity of ET to LAI(partial derivative ET/partial derivative LAI) in the models: partial derivative ET/partial derivative LAI is precisely and inversely proportional to the trend of LAI (partial derivative LAI/partial derivative t) across the ESMs. Constrained by this inversely proportional relationship with the satellite-observed partial derivative LAI/partial derivative t, the Earth's partial derivative ET/partial derivative LAI is 0.26 (0.21-0.34) mm d(-1) per m(2) m(-2), equaling the independent estimates from satellite-derived reconstructions of ET and LAI. Thus, the Earth's greening-induced acceleration of ET is about 11.4 mm yr(-1), accounting for more than 50% of the observed increase in land ET over the last 30 years. To better model the land-climate interaction, partial derivative ET/partial derivative LAI in these ESMs should be calibrated. A feasible means is to improve the representation of the magnitude of LAI in these CMIP5 ESMs.; National Natural Science Foundation of China [41530528]; 111 Project [B14001]; SCI(E); ARTICLE; slpiao@pku.edu.cn; 10; 11
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458797]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zeng, Zhenzhong,Zhu, Zaichun,Lian, Xu,et al. Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models[J]. ENVIRONMENTAL RESEARCH LETTERS,2016.
APA	Zeng, Zhenzhong.,Zhu, Zaichun.,Lian, Xu.,Li, Laurent Z. X..,Chen, Anping.,...&Piao, Shilong.(2016).Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models.ENVIRONMENTAL RESEARCH LETTERS.
MLA	Zeng, Zhenzhong,et al."Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models".ENVIRONMENTAL RESEARCH LETTERS (2016).