气候变化领域集成服务门户(CCPortal): Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models

CCPortal

DOI	10.1088/1748-9326/11/10/104006
	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
通讯作者	Piao, SL (通讯作者)
发表日期	2016
ISSN	1748-9326
卷号	11 期号:10
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.
关键词	LEAF-AREA INDEX CLIMATE CARBON WATER VARIABILITY SENSITIVITY EXCHANGE TRENDS ENERGY SAHEL
英文关键词	evapotranspiration sensitivity to greening; Earth greening; leaf area index; land-climate interaction; Earth System Modelling
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000388472700002
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258854
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]. 中国科学院青藏高原研究所,2016,11(10).
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,11(10).
MLA	Zeng, Zhenzhong,et al."Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models".ENVIRONMENTAL RESEARCH LETTERS 11.10(2016).