气候变化领域集成服务门户(CCPortal): Processes shaping the spatial pattern and seasonality of the surface air temperature response to anthropogenic forcing

CCPortal

DOI	10.1007/s00382-020-05211-8
	Processes shaping the spatial pattern and seasonality of the surface air temperature response to anthropogenic forcing
	Tian F.; Dong B.; Robson J.; Sutton R.; Wilcox L.
发表日期	2020
ISSN	0930-7575
起始页码	3959
结束页码	3975
卷号	54
英文摘要	In the period 1960–2010, the land surface air temperature (SAT) warmed more rapidly over some regions relative to the global mean. Using a set of time-slice experiments, we highlight how different physical processes shape the regional pattern of SAT warming. The results indicate an essential role of anthropogenic forcing in regional SAT changes from the 1970s to 2000s, and show that both surface–atmosphere interactions and large-scale atmospheric circulation changes can shape regional responses to forcing. Single forcing experiments show that an increase in greenhouse gases can lead to regional changes in land surface warming in winter (DJF) due to snow-albedo feedbacks, and in summer (JJA) due to soil-moisture and cloud feedbacks. Changes in anthropogenic aerosol and precursor (AA) emissions induce large spatial variations in SAT, characterized by warming over western Europe, Eurasia, and Alaska. In western Europe, SAT warming is stronger in JJA than in DJF due to substantial increases in clear sky shortwave radiation over Europe, associated with decreases in local AA emissions since the 1980s. In Alaska, the amplified SAT warming in DJF is due to increased downward longwave radiation, which is related to increased water vapor and cloud cover. In this case, although the model was able to capture the regional pattern of SAT change, and the associated local processes, it did not simulate all processes and anomalies correctly. For the Alaskan warming, the model is seen to achieve the correct regional response in the context of a wider North Pacific anomaly that is not consistent with observations. This demonstrates the importance of model evaluation that goes beyond the target variable in detection and attribution studies. © 2020, The Author(s).
语种	英语
scopus关键词	air temperature; atmospheric circulation; human activity; land surface; seasonal variation; seasonality; spatial variation; warming; Alaska; Europe; Pacific Ocean; Pacific Ocean (North); United States
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145488
作者单位	National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom
推荐引用方式 GB/T 7714	Tian F.,Dong B.,Robson J.,et al. Processes shaping the spatial pattern and seasonality of the surface air temperature response to anthropogenic forcing[J],2020,54.
APA	Tian F.,Dong B.,Robson J.,Sutton R.,&Wilcox L..(2020).Processes shaping the spatial pattern and seasonality of the surface air temperature response to anthropogenic forcing.Climate Dynamics,54.
MLA	Tian F.,et al."Processes shaping the spatial pattern and seasonality of the surface air temperature response to anthropogenic forcing".Climate Dynamics 54(2020).