DOI: 10.1002/2016GL071801
论文题名: Dust-infused baroclinic cyclone storm clouds: The evidence, meteorology, and some implications
作者: Fromm M. ; Kablick G. ; III ; Caffrey P.
刊名: Geophysical Research Letters
ISSN: 0094-8278
EISSN: 1944-8009
出版年: 2016
卷: 43, 期: 24 起始页码: 12643
结束页码: 12650
语种: 英语
英文关键词: aerosol
; cirrus
; dust
Scopus关键词: Aerosols
; Atmospheric composition
; Clouds
; Dust
; Landforms
; Optical radar
; Troposphere
; Aerosol indirect effect
; Baroclinic cyclone
; Brightness temperature difference
; Cirrus
; Free troposphere
; Long range transport
; Natural experiment
; UV absorbing aerosol
; Storms
英文摘要: Desert mineral dust is a critical yet still poorly understood component of atmospheric composition, weather, and climate. Long-range transport of dust is well known, yet uncertainty persists regarding the pathway from the desert floor to the free troposphere. Here we will show that a recurrent pathway for dust into the uppermost troposphere involves passage through an extratropical baroclinic cyclonic storm. The evidence derives from a synergistic use of satellite-based, multispectral nadir-image data and lidar. The dust-infused baroclinic storm (DIBS) exhibits peculiar cirrus cloud top reflected and emitted radiance from the UV through thermal IR, involving positive UV absorbing aerosol index, muted visible reflectivity, visible cumuliform texture, and systematically intense visible lidar backscatter on a synoptic scale. Proof that the DIBS is microphysically impacted by storm-scale dust infusion is the occurrence of anomalously large daytime 3.9–11μm brightness temperature difference indicative of small ice crystals. We present multispectral snapshots of two DIBS, over two desert source regions, in comparison with a pristine baroclinic storm cloud. Each storm snapshot is presented in the context of the baroclinic cyclone's lifetime and dust source region (the Gobi desert and the Sahara). These and other cases discussed show that the DIBS is a recurring conduit for long-range transport and a natural experiment in dust-related aerosol indirect effects. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007439480&doi=10.1002%2f2016GL071801&partnerID=40&md5=daf503c306529e7b1b127354e92a8fd0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9241
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Remote Sensing Division, U.S. Naval Research Laboratory, Washington, DC, United States
Recommended Citation:
Fromm M.,Kablick G.,III,et al. Dust-infused baroclinic cyclone storm clouds: The evidence, meteorology, and some implications[J]. Geophysical Research Letters,2016-01-01,43(24).