globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12724
论文题名:
Seasonally different response of photosynthetic activity to daytime and night-time warming in the Northern Hemisphere
作者: Tan J.; Piao S.; Chen A.; Zeng Z.; Ciais P.; Janssens I.A.; Mao J.; Myneni R.B.; Peng S.; Peñuelas J.; Shi X.; Vicca S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期:1
起始页码: 377
结束页码: 387
语种: 英语
英文关键词: Daytime warming ; Night-time warming ; Photosynthesis ; Seasonal change ; Vegetation activity
Scopus关键词: biological model ; carbon cycle ; ecosystem ; photosynthesis ; physiology ; plant physiology ; radiometry ; season ; telemetry ; temperature ; time ; Carbon Cycle ; Ecosystem ; Models, Biological ; Photosynthesis ; Plant Physiological Phenomena ; Radiometry ; Seasons ; Telemetry ; Temperature ; Time Factors
英文摘要: Over the last century the Northern Hemisphere has experienced rapid climate warming, but this warming has not been evenly distributed seasonally, as well as diurnally. The implications of such seasonal and diurnal heterogeneous warming on regional and global vegetation photosynthetic activity, however, are still poorly understood. Here, we investigated for different seasons how photosynthetic activity of vegetation correlates with changes in seasonal daytime and night-time temperature across the Northern Hemisphere (>30°N), using Normalized Difference Vegetation Index (NDVI) data from 1982 to 2011 obtained from the Advanced Very High Resolution Radiometer (AVHRR). Our analysis revealed some striking seasonal differences in the response of NDVI to changes in day- vs. night-time temperatures. For instance, while higher daytime temperature (Tmax) is generally associated with higher NDVI values across the boreal zone, the area exhibiting a statistically significant positive correlation between Tmax and NDVI is much larger in spring (41% of area in boreal zone - total area 12.6 × 106 km2) than in summer and autumn (14% and 9%, respectively). In contrast to the predominantly positive response of boreal ecosystems to changes in Tmax, increases in Tmax tended to negatively influence vegetation growth in temperate dry regions, particularly during summer. Changes in night-time temperature (Tmin) correlated negatively with autumnal NDVI in most of the Northern Hemisphere, but had a positive effect on spring and summer NDVI in most temperate regions (e.g., Central North America and Central Asia). Such divergent covariance between the photosynthetic activity of Northern Hemispheric vegetation and day- and night-time temperature changes among different seasons and climate zones suggests a changing dominance of ecophysiological processes across time and space. Understanding the seasonally different responses of vegetation photosynthetic activity to diurnal temperature changes, which have not been captured by current land surface models, is important for improving the performance of next generation regional and global coupled vegetation-climate models. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61905
Appears in Collections:影响、适应和脆弱性

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作者单位: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China; Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States; UMR CEA-CNRS, LSCE, Bat. 709 CE L'Orme des Merisiers, Gif-sur-Yvette, France; Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, Belgium; Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Department of Earth and Environment, Boston University, 675 Commonwealth Avenue, Boston, MA, United States; CREAF, Cerdanyola del Valles, Barcelona, Catalonia, Spain; CSIC, Global Ecology Unit CREAF-CEAB-CSIC-UAB, Cerdanyola del Valles, Barcelona, Catalonia, Spain

Recommended Citation:
Tan J.,Piao S.,Chen A.,et al. Seasonally different response of photosynthetic activity to daytime and night-time warming in the Northern Hemisphere[J]. Global Change Biology,2015-01-01,21(1)
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