气候变化领域集成服务门户(CCPortal): Responses of vegetation greenness and carbon cycle to extreme droughts in China

CCPortal

DOI	10.1016/j.agrformet.2020.108307
	Responses of vegetation greenness and carbon cycle to extreme droughts in China
	Deng, Ying; Wang, Xuhui; Wang, Kai; Ciais, Philippe; Tang, Shuchang; Jin, Lei; Li, Lili; Piao, Shilong
通讯作者	Wang, XH (通讯作者)
发表日期	2021
ISSN	0168-1923
EISSN	1873-2240
卷号	298
英文摘要	Increasing drought stress under climate change exerting large impacts on vegetation has aroused growing concern, yet how vegetation greenness and carbon cycle respond to extreme drought is not well understood. In this paper, we studied this issue with various data sources including satellite observation, flux sites upscaling estimation, atmospheric inversion, and Dynamic Global Vegetation Model (DGVM) simulations over China during the period 2000-2015. We found a highly consistent negative response of greenness and carbon fluxes to extreme droughts, with the largest reduction in Gross Primary Productivity (GPP, a standardized anomaly of -1.26 similar to -0.33), a slightly smaller extent decrease of Net Ecosystem Productivity (NEP, -0.74 similar to -0.14) due to concurrent decrease of respiration, and reduced Leaf Area Index (LAI, -0.39 similar to -0.20). Besides, there was a large spatial heterogeneity across different regions and biomes, where Loess Plateau was one of the most vulnerable regions. The ambient climate conditions were found to modulate the drought response. Drought sensitivity of greenness and GPP peaked where mean annual temperature is around 25 degrees C, while that of NEP decreased along increasing precipitation gradients.
关键词	GROSS PRIMARY PRODUCTIVITY NET PRIMARY PRODUCTION CLIMATE EXTREMES TERRESTRIAL GROSS IMPACTS FLUXES GROWTH HEAT ECOSYSTEMS BALANCE
英文关键词	Drought; Extreme climate; Vegetation greenness; Carbon cycle
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:000610797100022
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/260459
推荐引用方式 GB/T 7714	Deng, Ying,Wang, Xuhui,Wang, Kai,et al. Responses of vegetation greenness and carbon cycle to extreme droughts in China[J]. 中国科学院青藏高原研究所,2021,298.
APA	Deng, Ying.,Wang, Xuhui.,Wang, Kai.,Ciais, Philippe.,Tang, Shuchang.,...&Piao, Shilong.(2021).Responses of vegetation greenness and carbon cycle to extreme droughts in China.AGRICULTURAL AND FOREST METEOROLOGY,298.
MLA	Deng, Ying,et al."Responses of vegetation greenness and carbon cycle to extreme droughts in China".AGRICULTURAL AND FOREST METEOROLOGY 298(2021).