气候变化领域集成服务门户(CCPortal): Large-scale pattern of the wintertime diurnal temperature range variations over North America during 1979

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DOI	10.1016/j.atmosres.2021.105614
	Large-scale pattern of the wintertime diurnal temperature range variations over North America during 1979–2018
	Liu L.; Chen W.; Guo J.; Wu R.; Wang L.; Wang S.; Huo Y.; Tao W.
发表日期	2021
ISSN	0169-8095
卷号	257
英文摘要	The atmospheric circulation and remote forcing of SST anomalies play an imporant role in the formation of large-scale cloud cover and precipitation anomalies as well as the patterns of diurnal temperature range (DTR) variability. In this study, the dominant patterns of the wintertime DTR variations over North America (NA) and the underlying mechnisms are investigated based on observational and reanalysis datasets during 1979–2018. The first leading mode is characterized by a widespread same-sign loading in the majority of NA. The corresponding principal component (PC) shows an obvious interannual time-scale variations. The second mode displays a north-south dipole-like pattern in the NA and the corresponding PC exhibits a decline trend during 1979–2018. Both patterns of DTR variations are closely associated with the changes in local cloud cover and precipitation. Furthermore, clear effects are identified of El Niño-Southern Oscillation (ENSO) and Tropical/Northern Hemisphere (TNH) teleconnection on the formation of the two dominant patterns of wintertime DTR variabilty over NA through changing the atmospheric circulation and associated transportation of temperature and moisture. Our findings provide a new insight into understanding the DTR changes during recent decades. © 2021
英文关键词	Atmospheric circulation; Climate change; Climate dynamics; Cloud cover; Diurnal temperature range; ENSO
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236751
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100190, China; School of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang, China; Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, China; Anhui Institute of Meteorological Sciences, Hefei, Anhui, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Liu L.,Chen W.,Guo J.,等. Large-scale pattern of the wintertime diurnal temperature range variations over North America during 1979–2018[J],2021,257.
APA	Liu L..,Chen W..,Guo J..,Wu R..,Wang L..,...&Tao W..(2021).Large-scale pattern of the wintertime diurnal temperature range variations over North America during 1979–2018.Atmospheric Research,257.
MLA	Liu L.,et al."Large-scale pattern of the wintertime diurnal temperature range variations over North America during 1979–2018".Atmospheric Research 257(2021).