气候变化领域集成服务门户(CCPortal): An increasing trend in the ratio of transpiration to total terrestrial evapotranspiration in China from 1982 to 2015 caused by greening and warming

CCPortal

DOI	10.1016/j.agrformet.2019.107701
	An increasing trend in the ratio of transpiration to total terrestrial evapotranspiration in China from 1982 to 2015 caused by greening and warming
	Niu, Zhongen; He, Honglin; Zhu, Gaofeng; Ren, Xiaoli; Zhang, Li; Zhang, Kun; Yu, Guirui; Ge, Rong; Li, Pan; Zeng, Na; Zhu, Xiaobo
通讯作者	He, HL ; Ren, XL (通讯作者)
发表日期	2019
ISSN	0168-1923
EISSN	1873-2240
卷号	279
英文摘要	The ratio of transpiration to total terrestrial evapotranspiration (T/ET) plays an important role in the hydrological cycle and in the energy budgets between the land and the atmosphere. Although China has experienced substantial climate warming and vegetation restoration (i.e., greening) over the past decades, the response of T/ET to the changing climate and environmental factors is poorly understood. Here, we apply a model-data fusion method that integrates the Priestly-Taylor Jet Propulsion Laboratory (PT-JPL) model with multivariate observational datasets (transpiration and evapotranspiration) to quantify the relative contributions of multiple factors to the T/ET trend for the terrestrial ecosystem of China from 1982 to 2015. Validation against the observational data indicates that the PT-JPL model performed well. The multi-year average T/ET was estimated to be 0.56 +/- 0.05 in China. The T/ET of the forest ecosystems (0.65-0.72) was generally higher than that of the non-forest ecosystems (0.41-0.60). T/ET increased remarkably at a rate of 0.0019 yr(-1) (P < 0.01) during the study period. Leaf area index increased significantly over the period, by 0.0031 m(2)m(-2) yr(-1). It appears that greening and climate change were the most likely causes of the increasing T/ET in China, directly explaining 57.89% and 36.84% of the T/ET trend, respectively. Particularly, in the subtropical-tropical monsoonal region, greening directly contributed 24.43% to the T/ET trend whereas climate change contributed 60.95%. The influences of greening and climate change on T/ET trends are mutually reinforcing. Additionally, partial correlation analyses between the climate-driven T/ET and the climate variables indicate that warming (0.04 degrees C yr(-1), P < 0.01) was the major driving force of the climate-induced interannual variability of T/ET across the whole study area (R = 0.84), especially in the subtropical-tropical monsoonal region (R = 0.89). Our results may help elucidate the interactions between terrestrial ecosystems and the atmosphere within the context of long-term global climate changes.
关键词	PHOTOSYNTHETICALLY ACTIVE RADIATION NET PRIMARY PRODUCTIVITY WATER-USE EFFICIENCY WACMOS-ET PROJECT HEIHE RIVER-BASIN PARTITIONING EVAPOTRANSPIRATION EDDY-COVARIANCE CARBON-DIOXIDE TEMPERATE FOREST BAYESIAN CALIBRATION
英文关键词	Transpiration to total terrestrial evapotranspiration ratio (T/ET); Greening; Climate warming; Model-data fusion; PT-JPL model; Terrestrial ecosystem of China
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000500197400011
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/259608
推荐引用方式 GB/T 7714	Niu, Zhongen,He, Honglin,Zhu, Gaofeng,et al. An increasing trend in the ratio of transpiration to total terrestrial evapotranspiration in China from 1982 to 2015 caused by greening and warming[J]. 中国科学院青藏高原研究所,2019,279.
APA	Niu, Zhongen.,He, Honglin.,Zhu, Gaofeng.,Ren, Xiaoli.,Zhang, Li.,...&Zhu, Xiaobo.(2019).An increasing trend in the ratio of transpiration to total terrestrial evapotranspiration in China from 1982 to 2015 caused by greening and warming.AGRICULTURAL AND FOREST METEOROLOGY,279.
MLA	Niu, Zhongen,et al."An increasing trend in the ratio of transpiration to total terrestrial evapotranspiration in China from 1982 to 2015 caused by greening and warming".AGRICULTURAL AND FOREST METEOROLOGY 279(2019).