Satellite detection of cumulative and lagged effects of drought on autumn leaf senescence over the Northern Hemisphere

doi:10.1111/gcb.14627

	Satellite detection of cumulative and lagged effects of drought on autumn leaf senescence over the Northern Hemisphere
	Peng, Jie 1,2; Wu, Chaoyang 1,2; Zhang, Xiaoyang 3; Wang, Xiaoyue 1; Gonsamo, Alemu 4
刊名	GLOBAL CHANGE BIOLOGY
	2019-06-01
卷号	25 期号:6 页码:2174-2188
关键词	autumn phenology cumulative effect drought lagged effect
ISSN号	1354-1013
DOI	10.1111/gcb.14627
通讯作者	Wu, Chaoyang(wucy@igsnrr.ac.cn)
英文摘要	Climate change has substantial influences on autumn leaf senescence, that is, the end of the growing season (EOS). Relative to the impacts of temperature and precipitation on EOS, the influence of drought is not well understood, especially considering that there are apparent cumulative and lagged effects of drought on plant growth. Here, we investigated the cumulative and lagged effects of drought (in terms of the Standardized Precipitation-Evapotranspiration Index, SPEI) on EOS derived from the normalized difference vegetation index (NDVI3g) data over the Northern Hemisphere extra-tropical ecosystems (>30 degrees N) during 1982-2015. The cumulative effect was determined by the number of antecedent months at which SPEI showed the maximum correlation with EOS (i.e., Rmax-cml) while the lag effect was determined by a month during which the maximum correlation between 1-month SPEI and EOS occurred (i.e., Rmax-lag). We found cumulative effect of drought on EOS for 27.2% and lagged effect for 46.2% of the vegetated land area. For the dominant time scales where the Rmax-cml and Rmax-lag occurred, we observed 1-4 accumulated months for the cumulative effect and 2-6 lagged months for the lagged effect. At the biome level, drought had stronger impacts on EOS in grasslands, savannas, and shrubs than in forests, which may be related to the different root functional traits among vegetation types. Considering hydrological conditions, the mean values of both Rmax-cml and Rmax-lag decreased along the gradients of annual SPEI and its slope, suggesting stronger cumulative and lagged effects in drier regions as well as in areas with decreasing water availability. Furthermore, the average accumulated and lagged months tended to decline along the annual SPEI gradient but increase with increasing annual SPEI. Our results revealed that drought has strong cumulative and lagged effects on autumn phenology, and considering these effects could provide valuable information on the vegetation response to a changing climate.
资助项目	Chinese Academy of Sciences[XDA19040103] ; National Natural Science Foundation of China[41871225] ; Key Research Program of Frontier Sciences[QYZDB-SSW-DQC011]
WOS关键词	LAND-SURFACE PHENOLOGY ; NET ECOSYSTEM PRODUCTIVITY ; WATER-USE EFFICIENCY ; CLIMATE-CHANGE ; VEGETATION PHENOLOGY ; TEMPORAL DYNAMICS ; 3 DECADES ; RESPONSES ; CHINA ; VARIABILITY
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000467441900024
资助机构	Chinese Academy of Sciences ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/59823]
专题	中国科学院地理科学与资源研究所
通讯作者	Wu, Chaoyang
作者单位	1.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.South Dakota State Univ, Dept Geog, GSCE, Brookings, SD 57007 USA 4.Univ Toronto, Dept Geog & Planning, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Peng, Jie,Wu, Chaoyang,Zhang, Xiaoyang,et al. Satellite detection of cumulative and lagged effects of drought on autumn leaf senescence over the Northern Hemisphere[J]. GLOBAL CHANGE BIOLOGY,2019,25(6):2174-2188.
APA	Peng, Jie,Wu, Chaoyang,Zhang, Xiaoyang,Wang, Xiaoyue,&Gonsamo, Alemu.(2019).Satellite detection of cumulative and lagged effects of drought on autumn leaf senescence over the Northern Hemisphere.GLOBAL CHANGE BIOLOGY,25(6),2174-2188.
MLA	Peng, Jie,et al."Satellite detection of cumulative and lagged effects of drought on autumn leaf senescence over the Northern Hemisphere".GLOBAL CHANGE BIOLOGY 25.6(2019):2174-2188.