Trends toward an earlier peak of the growing season in Northern   Hemisphere mid-latitudes

doi:10.1111/gcb.13224

CORC > 北京大学 > 城市与环境学院

	Trends toward an earlier peak of the growing season in Northern Hemisphere mid-latitudes
	Xu, Chongyang ; Liu, Hongyan ; Williams, A. Park ; Yin, Yi ; Wu, Xiuchen
刊名	GLOBAL CHANGE BIOLOGY
	2016
关键词	climatic warming dryland mid-latitudinal biomes peak photosynthesis timing phenological shifting seasonality NDVI TIME-SERIES CLIMATE-CHANGE SPRING PHENOLOGY SEMIARID FORESTS TIBETAN PLATEAU CO2 UPTAKE VEGETATION DROUGHT MODEL PATTERNS
DOI	10.1111/gcb.13224
英文摘要	Changes in peak photosynthesis timing (PPT) could substantially change the seasonality of the terrestrial carbon cycle. Spring PPT in dry regions has been documented for some individual plant species on a stand scale, but both the spatio-temporal pattern of shifting PPT on a continental scale and its determinants remain unclear. Here, we use satellite measurements of vegetation greenness to find that the majority of Northern Hemisphere, mid-latitude vegetated area experienced a trend toward earlier PPT during 1982-2012, with significant trends of an average of 0.61dayyr(-1) across 19.4% of areas. These shifts correspond to increased annual accumulation of growing degree days (GDD) due to warming and are most highly concentrated in the eastern United States and Europe. Earlier mean PPT is generally a trait common among areas with summer temperatures higher than 27.6 +/- 2.9 degrees C, summer precipitation lower than 84.2 +/- 41.5mm, and fraction of cold season precipitation greater than 89.2 +/- 1.5%. The trends toward earlier PPT discovered here have co-occurred with overall increases in vegetation greenness throughout the growing season, suggesting that summer drought is not a dominant driver of these trends. These results imply that continued warming may facilitate continued shifts toward earlier PPT and cause these trends to become more pervasive, with important implications for terrestrial carbon, water, nutrient, and energy budgets.; Natural Science Foundation of China [NSFC 41325002, 41530747, 31321061]; SCI(E); PubMed; ARTICLE; lhy@urban.pku.edu.cn; 8; 2852-2860; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435435]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Xu, Chongyang,Liu, Hongyan,Williams, A. Park,et al. Trends toward an earlier peak of the growing season in Northern Hemisphere mid-latitudes[J]. GLOBAL CHANGE BIOLOGY,2016.
APA	Xu, Chongyang,Liu, Hongyan,Williams, A. Park,Yin, Yi,&Wu, Xiuchen.(2016).Trends toward an earlier peak of the growing season in Northern Hemisphere mid-latitudes.GLOBAL CHANGE BIOLOGY.
MLA	Xu, Chongyang,et al."Trends toward an earlier peak of the growing season in Northern Hemisphere mid-latitudes".GLOBAL CHANGE BIOLOGY (2016).