DOI: 10.1016/j.atmosenv.2019.117176
论文题名: Temporal variation of dust emissions in dust sources over Central Asia in recent decades and the climate linkages
作者: Shi L. ; Zhang J. ; Yao F. ; Zhang D. ; Guo H.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 222 语种: 英语
英文关键词: Atmospheric pressure
; Climatology
; CasHKI
; Climate prediction centers
; Dust emission
; Multivariate enso indices
; North Atlantic oscillations
; Research and application
; Retrospective analysis
; Southern oscillation index
; Dust
; cold air
; desert
; dust
; emission
; index method
; NOAA satellite
; North Atlantic Oscillation
; pollutant source
; precipitation (climatology)
; pressure gradient
; seasonal variation
; temporal variation
; wind field
; article
; autumn
; Caspian Sea
; cold air
; desert
; drought
; El Nino
; environmental protection
; evaporation
; Hindu
; human
; Kazakhstan
; meteorology
; North Atlantic oscillation
; precipitation
; prediction
; pressure gradient
; retrospective study
; spring
; summer
; vegetation
; wind speed
; Aralkum
; Arctic
; Asia
; Caspian Sea
; Central Asia
; Hindu Kush
; Karakum
; Kazakhstan
; Turkmenistan
; Ustyurt
学科: CasHKI
; Dust emission source
; Multivariate ENSO index
; North Atlantic oscillation
; Winds fields
中文摘要: The temporal variation of dust emissions over Central Asia in recent decades and the linkages with atmospheric factors have not been well documented. This study investigated the annual and interannual variations of dust emissions in the six main dust emission regions (i.e., Sor Mertvyy Kultuk (SMK), Ustyurt Plateau (UP), Southeast of Aralkum (SA), Eastern shore of the southern Caspian (ESC), Central Karakum desert (CK), and Trans-Unguz Karakum desert (TK)), using the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2) data from 1980 to 2018. The climate linkages with the variation trend were explored using reanalysis data and the climate indices from NOAA Climate Prediction Center (CPC). The results indicated that, in early spring, dust emissions are distinct in all these sources (except for ESC) due to the cold air intrusions from north, northwest, and northeast directions, and the effect of precipitation was limited by the high evaporation. Whereas in summer and/or early autumn, dust emissions were primarily in SA, ESC, CK, and TK because of the strong northeasterly winds, low vegetation, and dry soils. The overall interannual change of dust emissions in Central Asia showed that relatively larger emissions occurred during 1980–1986 and 1993–2003, especially in April. The dust emissions in SA, ESC, and TK in summer were positively correlated with the pressure gradient between northwestern Kazakhstan and Hindu Kush (NWKHKI), while those in SMK were negatively correlated with Caspian Sea High. The dust emissions in the six dust sources were highly correlated with the maximum wind speeds but showed different sensitivities to drought. The Multivariate El Niño-Southern Oscillation Index (MEI) was related to dust emissions in April over coastal Caspian-Sea areas (SMK and ESC), while those in February over the southern parts (ESC, CK, and TK) were significantly correlated with North Atlantic Oscillation/Arctic Oscillation (NAO/AO). These conclusions could contribute to the meteorology research related to dust emissions and also to the decisions made for environmental protection. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/161074
Appears in Collections: 气候变化与战略
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作者单位: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100094, China; Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China; University of Chinese Academy of Sciences, Beijing, 101407, China
Recommended Citation:
Shi L.,Zhang J.,Yao F.,et al. Temporal variation of dust emissions in dust sources over Central Asia in recent decades and the climate linkages[J]. Atmospheric Environment,2020-01-01,222