globalchange  > 影响、适应和脆弱性
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
Author: Barichivich J.; Briffa K.R.; Myneni R.B.; Osborn T.J.; Melvin T.M.; Ciais P.; Piao S.; Tucker C.
Source Publication: Global Change Biology
ISSN: 13541013
Publishing Year: 2013
Volume: 19, Issue:10
pages begin: 3167
pages end: 3183
Language: 英语
Keyword: Carbon cycle ; Climate change ; NDVI ; Phenology ; Vegetation greening
Scopus Keyword: annual variation ; atmospheric chemistry ; carbon cycle ; carbon dioxide ; climate change ; growth rate ; NDVI ; photosynthesis ; vegetation dynamics ; carbon dioxide ; article ; Asia ; carbon cycle ; climate change ; Europe ; history ; NDVI ; North America ; phenology ; photosynthesis ; plant physiology ; season ; telecommunication ; temperature ; vegetation greening ; carbon cycle ; climate change ; NDVI ; phenology ; vegetation greening ; Asia ; Carbon Cycle ; Carbon Dioxide ; Climate Change ; Europe ; History, 20th Century ; History, 21st Century ; North America ; Photosynthesis ; Plant Physiological Phenomena ; Satellite Communications ; Seasons ; Temperature
English Abstract: 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°N) and their connection with the carbon cycle. During the last three decades, the thermal potential growing season has lengthened by about 10.5 days (P < 0.01, 1982-2011), which is unprecedented in the context of the past 60 years. The overall lengthening has been stronger and more significant in Eurasia (12.6 days, P < 0.01) than North America (6.2 days, 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 (6.7 days 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. © 2013 John Wiley & Sons Ltd.
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Document Type: 期刊论文
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Affiliation: Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Department of Earth and Environment, Boston University, Boston, MA, United States; Laboratory for Climate Sciences and the Environment (LSCE), Joint Unit of CEA-CNRS, Gif-sur-Yvette, France; College of Urban and Environmental Sciences, Peking University, Beijing, China; Key Laboratory of Alpine and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100085, China; Biospheric Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, United States

Recommended Citation:
Barichivich J.,Briffa K.R.,Myneni R.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]. Global Change Biology,2013-01-01,19(10)
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