Temperature and vegetation seasonality diminishment over northern lands

doi:10.1038/NCLIMATE1836

CORC > 北京大学 > 城市与环境学院

	Temperature and vegetation seasonality diminishment over northern lands
	Xu, L. ; Myneni, R. B. ; Chapin, F. S., III ; Callaghan, T. V. ; Pinzon, J. E. ; Tucker, C. J. ; Zhu, Z. ; Bi, J. ; Ciais, P. ; Tommervik, H. ; Euskirchen, E. S. ; Forbes, B. C. ; Piao, S. L. ; Anderson, B. T. ; Ganguly, S. ; Nemani, R. R. ; Goetz, S. J. ; Beck, P. S. A. ; Bunn, A. G. ; Cao, C. ; Stroeve, J. C.
刊名	nature climate change
	2013
关键词	ARCTIC VEGETATION TUNDRA ECOSYSTEMS PLANT DYNAMICS
DOI	10.1038/NCLIMATE1836
英文摘要	Global temperature is increasing, especially over northern lands (>50 degrees N), owing to positive feedbacks(1). As this increase is most pronounced in winter, temperature seasonality (S-T)-conventionally defined as the difference between summer and winter temperatures-is diminishing over time(2), a phenomenon that is analogous to its equatorward decline at an annual scale. The initiation, termination and performance of vegetation photosynthetic activity are tied to threshold temperatures(3). Trends in the timing of these thresholds and cumulative temperatures above them may alter vegetation productivity, or modify vegetation seasonality (S-V), over time. The relationship between S-T and S-V is critically examined here with newly improved ground and satellite data sets. The observed diminishment of S-T and S-V, is equivalent to 4 degrees and 7 degrees (5 degrees and 6 degrees) latitudinal shift equatorward during the past 30 years in the Arctic. (boreal) region. Analysis of simulations from 17 state-of-the-art climate models(4) indicates an additional S-T diminishment equivalent to a 20 equatorward shift could occur this century. How S-V will change in response to such large projected S-T declines and the impact this will have on ecosystem services(5) are not well understood. Hence the need for continued monitoring(6) of northern lands as their seasonal temperature profiles evolve to resemble those further south.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000321166400019&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; Environmental Studies; Meteorology & Atmospheric Sciences; SCI(E); SSCI; 120; ARTICLE; 6; 581-586; 3
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/391476]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Xu, L.,Myneni, R. B.,Chapin, F. S., III,et al. Temperature and vegetation seasonality diminishment over northern lands[J]. nature climate change,2013.
APA	Xu, L..,Myneni, R. B..,Chapin, F. S., III.,Callaghan, T. V..,Pinzon, J. E..,...&Stroeve, J. C..(2013).Temperature and vegetation seasonality diminishment over northern lands.nature climate change.
MLA	Xu, L.,et al."Temperature and vegetation seasonality diminishment over northern lands".nature climate change (2013).