气候变化领域集成服务门户(CCPortal): Declining diurnal temperature range in the North China Plain related to environmental changes

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DOI	10.1007/s00382-018-4505-8
	Declining diurnal temperature range in the North China Plain related to environmental changes
	Xue W.; Guo J.; Zhang Y.; Zhou S.; Wang Y.; Miao Y.; Liu L.; Xu H.; Li J.; Chen D.; Liu H.
发表日期	2019
ISSN	0930-7575
起始页码	6109
结束页码	6119
卷号	52 期号:2020-09-10
英文摘要	The decreases in diurnal temperature range (DTR) observed in most regions are generally linked to the increase in cloud cover. However, declining clouds and rising aerosols observed over the North China Plain (NCP) of China make it elusive to elucidate the underlying mechanisms behind the declining DTR observed in this region. Here, we analyze the changes in DTR characteristics in the NCP based on 54-year surface temperature observations, in combination with collocated environmental variable measurements. Overall, there is a significant declining trend of DTR from 1960 to 2014 at a rate of − 0.12 °C/decade, largely due to a larger increase in minimum temperature during the night. The cloud effect on DTR is further explored by comparing DTR under clear-sky and overcast conditions, which exhibits a distinct annual cycle with a minimum in summer and a maximum in winter. The decreasing rate of DTR under overcast condition is − 0.30 °C/decade, much faster than the rate of − 0.17 °C/decade under clear-sky condition, indicating steady increases in the nighttime warming effect of middle- or high-clouds. Also, the elevated aerosol concentration could contribute to the declining DTR, due to the cooling effect of aerosols. Moreover, the effect induced by sunshine duration and water vapor on DTR cannot be ignored either. All of the aforementioned environmental variables combine to affect the long-term trend of DTR, despite their different roles in modulating DTR. Our findings call for better understanding of the influence of environmental factors on regional climate system at the diurnal timescale. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	aerosol composition; air temperature; diurnal variation; environmental change; environmental factor; regional climate; surface temperature; water vapor; China; North China Plain
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/146316
作者单位	School of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Meteorological Observation Center, China Meteorological Administration, Beijing, 100081, China; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States
推荐引用方式 GB/T 7714	Xue W.,Guo J.,Zhang Y.,et al. Declining diurnal temperature range in the North China Plain related to environmental changes[J],2019,52(2020-09-10).
APA	Xue W..,Guo J..,Zhang Y..,Zhou S..,Wang Y..,...&Liu H..(2019).Declining diurnal temperature range in the North China Plain related to environmental changes.Climate Dynamics,52(2020-09-10).
MLA	Xue W.,et al."Declining diurnal temperature range in the North China Plain related to environmental changes".Climate Dynamics 52.2020-09-10(2019).