气候变化领域集成服务门户(CCPortal): Higher temperature variability reduces temperature sensitivity of vegetation growth in Northern Hemisphere

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DOI	10.1002/2017GL073285
	Higher temperature variability reduces temperature sensitivity of vegetation growth in Northern Hemisphere
	Wu, Xiuchen; Liu, Hongyan; Li, Xiaoyan; Piao, Shilong; Ciais, Philippe; Guo, Weichao; Yin, Yi; Poulter, Ben; Peng, Changhui; Viovy, Nicolas; Vuichard, Nicolas; Wang, Pei; Huang, Yongmei
通讯作者	Wu, XC ; Li, XY (通讯作者)
发表日期	2017
ISSN	0094-8276
EISSN	1944-8007
起始页码	6173
结束页码	6181
卷号	44 期号:12
英文摘要	Interannual air temperature variability has changed over some regions in Northern Hemisphere (NH), accompanying with climate warming. However, whether and to what extent it regulates the interannual sensitivity of vegetation growth to temperature variability (i.e., interannual temperature sensitivity)-one central issue in understanding and predicting the responses of vegetation growth to changing climate-still remains poorly quantified and understood. Here we quantify the relationships between the interannual temperature sensitivity of mean growing-season (April-October) normalized difference vegetation index (NDVI) and ecosystem model simulations of gross primary productivity (GPP), and variability in mean growing-season temperature for forest, shrub, and grass over NH. We find that higher interannual variability in mean growing-season temperature leads to consistent decrease in interannual temperature sensitivity of mean growing-season NDVI among all vegetation types but not in model simulations of GPP. Drier condition associates with similar to 130 +/- 150% further decrease in interannual temperature sensitivity of mean growing-season NDVI by temperature variability in forest and shrub. These results illustrate that varying temperature variability can significantly regulate the interannual temperature sensitivity of vegetation growth over NH, interacted with drought variability and nonlinear responses of photosynthesis to temperature. Our findings call for an improved characterization of the nonlinear effects of temperature variability on vegetation growth within global ecosystem models.
关键词	CARBON SINK CLIMATE SUMMER DROUGHT PRODUCTIVITY REDUCTION ADAPTATION ECOSYSTEMS LATITUDES MORTALITY
英文关键词	temperature variability; interannual sensitivity; vegetation growth; drought; Northern Hemisphere
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000405854200035
来源期刊	GEOPHYSICAL 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/259100
推荐引用方式 GB/T 7714	Wu, Xiuchen,Liu, Hongyan,Li, Xiaoyan,et al. Higher temperature variability reduces temperature sensitivity of vegetation growth in Northern Hemisphere[J]. 中国科学院青藏高原研究所,2017,44(12).
APA	Wu, Xiuchen.,Liu, Hongyan.,Li, Xiaoyan.,Piao, Shilong.,Ciais, Philippe.,...&Huang, Yongmei.(2017).Higher temperature variability reduces temperature sensitivity of vegetation growth in Northern Hemisphere.GEOPHYSICAL RESEARCH LETTERS,44(12).
MLA	Wu, Xiuchen,et al."Higher temperature variability reduces temperature sensitivity of vegetation growth in Northern Hemisphere".GEOPHYSICAL RESEARCH LETTERS 44.12(2017).