气候变化领域集成服务门户(CCPortal): Temperature and vegetation seasonality diminishment over northern lands

CCPortal

DOI	10.1038/NCLIMATE1836
	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.
通讯作者	Xu, L (通讯作者)
发表日期	2013
ISSN	1758-678X
EISSN	1758-6798
起始页码	581
结束页码	586
卷号	3 期号:6
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.
关键词	ARCTIC VEGETATION TUNDRA PLANT ECOSYSTEMS DYNAMICS
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000321166400019
来源期刊	NATURE CLIMATE CHANGE
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/258246
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]. 中国科学院青藏高原研究所,2013,3(6).
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,3(6).
MLA	Xu, L.,et al."Temperature and vegetation seasonality diminishment over northern lands".NATURE CLIMATE CHANGE 3.6(2013).