气候变化领域集成服务门户(CCPortal): Asymmetric effects of daytime and night-time warming on Northern Hemisphere vegetation

CCPortal

DOI	10.1038/nature12434
	Asymmetric effects of daytime and night-time warming on Northern Hemisphere vegetation
	Peng, Shushi; Piao, Shilong; Ciais, Philippe; Myneni, Ranga B.; Chen, Anping; Chevallier, Frederic; Dolman, Albertus J.; Janssens, Ivan A.; Penuelas, Josep; Zhang, Gengxin; Vicca, Sara; Wan, Shiqiang; Wang, Shiping; Zeng, Hui
通讯作者	Piao, S (通讯作者)
发表日期	2013
ISSN	0028-0836
EISSN	1476-4687
起始页码	88
结束页码	+
卷号	501 期号:7465
英文摘要	Temperature data over the past five decades show faster warming of the global land surface during the night than during the day(1). This asymmetric warming is expected to affect carbon assimilation and consumption in plants, because photosynthesis in most plants occurs during daytime and is more sensitive to the maximum daily temperature, T-max, whereas plant respiration occurs throughout the day(2) and is therefore influenced by both T-max and the minimum daily temperature, T-min. Most studies of the response of terrestrial ecosystems to climate warming, however, ignore this asymmetric forcing effect on vegetation growth and carbon dioxide (CO2) fluxes(3-6). Here we analyse the interannual covariations of the satellite-derived normalized difference vegetation index (NDVI, an indicator of vegetation greenness) with Tmax and Tmin over the Northern Hemisphere. After removing the correlation between Tmax and Tmin, we find that the partial correlation between Tmax and NDVI is positive in most wet and cool ecosystems over boreal regions, but negative in dry temperate regions. In contrast, the partial correlation between Tmin and NDVI is negative in boreal regions, and exhibits a more complex behaviour in dry temperate regions. We detect similar patterns in terrestrial net CO2 exchange maps obtained from a global atmospheric inversion model. Additional analysis of the long-term atmospheric CO2 concentration record of the station Point Barrow in Alaska suggests that the peak-to-peak amplitude of CO2 increased by 23 +/- 11% for a +1 degrees C anomaly in T-max from May to September over lands north of 51 degrees N, but decreased by 28 +/- 14% for a +1 degrees C anomaly in T-min. These lines of evidence suggest that asymmetric diurnal warming, a process that is currently not taken into account in many global carbon cycle models, leads to a divergent response of Northern Hemisphere vegetation growth and carbon sequestration to rising temperatures.
关键词	NET PRIMARY PRODUCTION CARBON-DIOXIDE RIDGE REGRESSION LEAF RESPIRATION CLIMATE-CHANGE SATELLITE TEMPERATURE IMPACT GROWTH
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000323888300037
来源期刊	NATURE
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/258245
推荐引用方式 GB/T 7714	Peng, Shushi,Piao, Shilong,Ciais, Philippe,et al. Asymmetric effects of daytime and night-time warming on Northern Hemisphere vegetation[J]. 中国科学院青藏高原研究所,2013,501(7465).
APA	Peng, Shushi.,Piao, Shilong.,Ciais, Philippe.,Myneni, Ranga B..,Chen, Anping.,...&Zeng, Hui.(2013).Asymmetric effects of daytime and night-time warming on Northern Hemisphere vegetation.NATURE,501(7465).
MLA	Peng, Shushi,et al."Asymmetric effects of daytime and night-time warming on Northern Hemisphere vegetation".NATURE 501.7465(2013).