气候变化领域集成服务门户(CCPortal): New Inventory of Dust Emission Sources in Central Asia and Northwestern China Derived From MODIS Imagery Using Dust Enhancement Technique

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DOI	10.1029/2020JD033382
	New Inventory of Dust Emission Sources in Central Asia and Northwestern China Derived From MODIS Imagery Using Dust Enhancement Technique
	Nobakht M.; Shahgedanova M.; White K.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	The first inventory of dust emission sources in Central Asia and northwestern China (35–50°N, 50–100°E) derived from the twice daily MODIS imagery from 2003 to 2012 is presented. A high-resolution (1 km) dust enhancement product was generated to produce maps of dust point sources (DPS), indicating geographical locations of the observed dust emissions, and gridded data sets of dust emission frequencies. About 13,500 DPS were detected over an area of ∼5 × 106 km2, however, their distribution was uneven. The highest frequency of DPS occurred in the northern and eastern Taklimakan, in the Aralkum, and in the regions, which were not widely reported in literature before, the Balkh delta in northern Afghanistan and the pre-Aral, from the northern Caspian coast to the Betpak-Dala desert in Kazakhstan. South of the Aral, DPS were mainly associated with fluvial features: drying lakes, dry river beds, alluvial deposits and agricultural activity which is closely linked to water availability in this arid region. In the pre-Aral and Balkhash-Junggar regions, land damaged by wildfire was the main source of dust. In China and eastern Kazakhstan dust emissions peaked in spring; in Central Asia and western Kazakhstan—in summer. The Aralkum was active throughout the year with a positive trend in emission frequency over the study period. Locations of DPS did not always correlate with high atmospheric optical depth (AOD) particularly west of the Aral and in the southern Taklimakan where few DPS were detected despite the high AOD values. This was attributed to dust transport from the upwind sources. © 2021. The Authors.
英文关键词	aerosol; Central Asia; deserts; dust enhancement; mineral dust; MODIS
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185478
作者单位	Department of Geography and Environmental Science, University of ReadingReading, United Kingdom; Telespasio VEGA UK Ltd., Luton, United Kingdom
推荐引用方式 GB/T 7714	Nobakht M.,Shahgedanova M.,White K.. New Inventory of Dust Emission Sources in Central Asia and Northwestern China Derived From MODIS Imagery Using Dust Enhancement Technique[J],2021,126(4).
APA	Nobakht M.,Shahgedanova M.,&White K..(2021).New Inventory of Dust Emission Sources in Central Asia and Northwestern China Derived From MODIS Imagery Using Dust Enhancement Technique.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Nobakht M.,et al."New Inventory of Dust Emission Sources in Central Asia and Northwestern China Derived From MODIS Imagery Using Dust Enhancement Technique".Journal of Geophysical Research: Atmospheres 126.4(2021).