气候变化领域集成服务门户(CCPortal): Large-scale variations in the vegetation growing season and annual cycle of atmospheric CO2 at high northern latitudes from 1950 to 2011

CCPortal

DOI	10.1111/gcb.12283
	Large-scale variations in the vegetation growing season and annual cycle of atmospheric CO2 at high northern latitudes from 1950 to 2011
	Barichivich, Jonathan; Briffa, Keith R.; Myneni, Ranga B.; Osborn, Timothy J.; Melvin, Thomas M.; Ciais, Philippe; Piao, Shilong; Tucker, Compton
通讯作者	Barichivich, J (通讯作者)
发表日期	2013
ISSN	1354-1013
EISSN	1365-2486
起始页码	3167
结束页码	3183
卷号	19 期号:10
英文摘要	We combine satellite and ground observations during 1950-2011 to study the long-term links between multiple climate (air temperature and cryospheric dynamics) and vegetation (greenness and atmospheric CO2 concentrations) indicators of the growing season of northern ecosystems (>45 degrees N) and their connection with the carbon cycle. During the last three decades, the thermal potential growing season has lengthened by about 10.5days (P<0.01, 1982-2011), which is unprecedented in the context of the past 60years. The overall lengthening has been stronger and more significant in Eurasia (12.6days, P<0.01) than North America (6.2days, P>0.05). The photosynthetic growing season has closely tracked the pace of warming and extension of the potential growing season in spring, but not in autumn when factors such as light and moisture limitation may constrain photosynthesis. The autumnal extension of the photosynthetic growing season since 1982 appears to be about half that of the thermal potential growing season, yielding a smaller lengthening of the photosynthetic growing season (6.7days at the circumpolar scale, P<0.01). Nevertheless, when integrated over the growing season, photosynthetic activity has closely followed the interannual variations and warming trend in cumulative growing season temperatures. This lengthening and intensification of the photosynthetic growing season, manifested principally over Eurasia rather than North America, is associated with a long-term increase (22.2% since 1972, P<0.01) in the amplitude of the CO2 annual cycle at northern latitudes. The springtime extension of the photosynthetic and potential growing seasons has apparently stimulated earlier and stronger net CO2 uptake by northern ecosystems, while the autumnal extension is associated with an earlier net release of CO2 to the atmosphere. These contrasting responses may be critical in determining the impact of continued warming on northern terrestrial ecosystems and the carbon cycle.
关键词	CLIMATE-CHANGE SNOW-COVER PHENOLOGICAL TRANSITIONS CARBON SEQUESTRATION SPRING PHENOLOGY PLANT PHENOLOGY BOREAL FOREST DATA SET TRENDS MODIS
英文关键词	carbon cycle; climate change; NDVI; phenology; vegetation greening
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000323844200023
来源期刊	GLOBAL CHANGE BIOLOGY
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/258239
推荐引用方式 GB/T 7714	Barichivich, Jonathan,Briffa, Keith R.,Myneni, Ranga B.,et al. Large-scale variations in the vegetation growing season and annual cycle of atmospheric CO2 at high northern latitudes from 1950 to 2011[J]. 中国科学院青藏高原研究所,2013,19(10).
APA	Barichivich, Jonathan.,Briffa, Keith R..,Myneni, Ranga B..,Osborn, Timothy J..,Melvin, Thomas M..,...&Tucker, Compton.(2013).Large-scale variations in the vegetation growing season and annual cycle of atmospheric CO2 at high northern latitudes from 1950 to 2011.GLOBAL CHANGE BIOLOGY,19(10).
MLA	Barichivich, Jonathan,et al."Large-scale variations in the vegetation growing season and annual cycle of atmospheric CO2 at high northern latitudes from 1950 to 2011".GLOBAL CHANGE BIOLOGY 19.10(2013).