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学科主题: 生物科学::普通生物学
题名: Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models
作者: Zeng, ZZ (Zeng, Zhenzhong)1; Zhu, ZC (Zhu, Zaichun)1; Lian, X (Lian, Xu)1; Li, LZX (Li, Laurent Z. X.)2; Chen, AP (Chen, Anping)3; He, XG (He, Xiaogang)4; Piao, SL (Piao, Shilong)1, 5
通讯作者: Piao, SL
关键词: LEAF-AREA INDEX ; NORTHERN ECOSYSTEMS ; FOREST GROWTH ; CLIMATE ; CARBON ; WATER ; TRANSPIRATION ; VARIABILITY ; SENSITIVITY ; EXCHANGE
刊名: ENVIRONMENTAL RESEARCH LETTERS
发表日期: 2016
DOI: 10.1088/1748-9326/11/10/104006
卷: 11, 期:10, 页:104006
收录类别: SCI
合作性质: 国际
文章类型: Article
部门归属: 生态
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.
语种: 英语
WOS记录号: WOS:000388472700002
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7540
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Peking Univ, Sinofrench Inst Earth Syst Sci, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
2.Univ Pierre & Marie Curie Paris 6, CNRS, Lab Meteorol Dynam, F-75252 Paris, France
3.Woods Hole Res Ctr, Falmouth, MA 02540 USA
4.Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA
5.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China

Recommended Citation:
Zeng, ZZ ,Zhu, ZC ,Lian, X ,et al. Responses of land evapotranspiration to Earth's greening in CMIP5 Earth System Models[J]. ENVIRONMENTAL RESEARCH LETTERS,2016,11(10):104006.
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