气候变化领域集成服务门户(CCPortal): Changes of the relationship between spring sand dust frequency and large-scale atmospheric circulation

CCPortal

DOI	10.1016/j.atmosres.2019.04.004
	Changes of the relationship between spring sand dust frequency and large-scale atmospheric circulation
	Yang M.; Zhu X.; Pan H.; Ai W.; Song W.; Pan Y.
发表日期	2019
ISSN	0169-8095
起始页码	102
结束页码	109
卷号	226
英文摘要	Sand/dust occurrences are one of major disasters in arid and semi-arid areas. Understanding its time evolution as well as the impact factors is crucial for policy makers to protect human from health and economic losses. In this paper, we investigate the features of spring sand/dust frequency during 1961–2016 based on 201 surface meteorological stations in northern China, which are divided into four regions as Xinjiang, Northwest China, North China, and Northeast China according to the spatial distribution of sand/dust frequency. Although the regional mean sand/dust frequency exhibits a general declining trend in the last 56 years, it shows fluctuations with the maximum occurrence in the 1970s and the minimum in the 2010s, and abrupt changes can be found in the late 1980s by the Lepage test. We choose 1961–1988 as the active sand/dust period and 1989–2016 as the inactive sand/dust period. Apparent differences are found between these two epochs in the large-scale atmospheric circulations. The geopotential height over Mongolia and Inner Mongolia of China at mid-and lower troposphere became much higher, and the Asian polar vortex weakened and shrank noticeably in the inactive sand/dust period. For 1961–1988, a meridional dipole pattern of significant correlation in heights at mid-and lower levels was dominant over the northeastern Eurasian continent, while for 1989–2016, sand/dust frequency seems to have much closer relationship with local circulation and a zonal dipole structure at lower troposphere dominated over China. The relationship between the 850 hPa vorticity over Mongolia and sand/dust frequency was strengthened after the late 1980s for the western areas, but that was weakened for the eastern areas of northern China. Besides, the intensity of Asian polar vortex at 500 hPa had higher correlation with sand/dust frequency during 1989–2016 particularly for Northwest China. All these findings are important to refine reliable models for short-term climate prediction of sand/dust occurrence in East Asia. © 2019 Elsevier B.V.
英文关键词	Abrupt change; Atmospheric circulation; Inter-decadal variation; Sand/dust frequency
语种	英语
scopus关键词	Climate models; Climatology; Losses; Troposphere; Vortex flow; Abrupt change; Arid and semi-arid areas; Atmospheric circulation; Geo-potential heights; Inter-decadal variations; Lower troposphere; Meteorological station; Short-term climate prediction; Sand; atmospheric circulation; decadal variation; dust; frequency analysis; sand; seasonal variation; trend analysis; China; Xinjiang Uygur
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/162307
作者单位	National Climate Center, Beijing, 100081, China; National Forestry and Grassland Administration, Beijing, 100714, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Yang M.,Zhu X.,Pan H.,et al. Changes of the relationship between spring sand dust frequency and large-scale atmospheric circulation[J],2019,226.
APA	Yang M.,Zhu X.,Pan H.,Ai W.,Song W.,&Pan Y..(2019).Changes of the relationship between spring sand dust frequency and large-scale atmospheric circulation.Atmospheric Research,226.
MLA	Yang M.,et al."Changes of the relationship between spring sand dust frequency and large-scale atmospheric circulation".Atmospheric Research 226(2019).