干旱区生态环境知识资源中心(Arid): Dust Climatology of the NASA Dryden Flight Research Center (DFRC) in Lancaster, California, USA

Arid

DOI	10.3390/cli5010015
	Dust Climatology of the NASA Dryden Flight Research Center (DFRC) in Lancaster, California, USA
	Pokharel, Ashok K.; Kaplan, Michael L.
通讯作者	Pokharel, AK
来源期刊	CLIMATE
ISSN	2225-1154
出版年	2017
卷号	5 期号:1
英文摘要	A 15-year (1997-2011) climatology of dust events at the NASA DFRC in Lancaster, California, USA, was performed to evaluate how the extratropical systems were associated with dust storms over this region. For this study, we collected meteorological data for Edwards Air Force Base (EAFB) in Lancaster, California, which is very close to NASA DFRC, from wunderground.com, National Centers for Environmental Prediction (NCEP)/North American Regional Reanalysis (NARR), NCEP/Hydro-meteorological Prediction Center/National Weather Service (NWS), and Unisys analyses. We find that the dust events were associated with the development of a deep convective boundary layer, turbulence kinetic energy (TKE) 3 J/kg, a deep unstable lapse rate layer, a wind speed above the frictional threshold wind speed necessary to ablate dust from the surface (7.3 m/s), a presence of a cold trough above the deep planetary boundary layer (PBL), a strong cyclonic jet, an influx of vertical sensible heat from the surrounding area, and a low volumetric soil moisture fraction <0.3. The annual mean number of dust events, their mean duration, and the unit duration per number of event for each visibility range, when binned as <11.2 km, <8 km, <4.8 km, <1.6 km, and <1 km were calculated. The visibility range values were positively correlated with the annual mean number of dust events, duration of dust events, and the ratio of duration of dust events. The percentage of the dust events by season shows that most of the dust events occurred in autumn (44.7%), followed by spring (38.3%), and equally in summer and winter with these seasons each accounting for 8.5% of events. This study also shows that the summer had the highest percentage (10%) of the lowest visibility condition (<1 km) followed by autumn (2%). Neither of the other two seasonswinter and springexperienced such a low visibility condition during the entire dust events over 15 years. Winter had the highest visibility (<11.2 km) percentage, which was 67% followed by spring (55%). Wind speed increasing to a value within the range of 3.6-11 m/s was typically associated with the dust events.
英文关键词	climatology dust events frequency visibility wind rose TKE cyclonic jet
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000398698500014
WOS关键词	WESTERN UNITED-STATES ; ASIAN DUST ; SOUTHERN NEVADA ; MINERAL DUST ; STORM EVENTS ; EOLIAN DUST ; AEROSOL ; DESERT ; VISIBILITY ; DEPOSITION
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
Scopus学科分类	Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA.
来源机构	Desert Research Institute
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332105
作者单位	[Pokharel, Ashok K.] Univ Nevada, Grad Program Atmospher Sci, Reno, NV 89557 USA; [Pokharel, Ashok K.; Kaplan, Michael L.] Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
推荐引用方式 GB/T 7714	Pokharel, Ashok K.,Kaplan, Michael L.. Dust Climatology of the NASA Dryden Flight Research Center (DFRC) in Lancaster, California, USA[J]. Desert Research Institute,2017,5(1).
APA	Pokharel, Ashok K.,&Kaplan, Michael L..(2017).Dust Climatology of the NASA Dryden Flight Research Center (DFRC) in Lancaster, California, USA.CLIMATE,5(1).
MLA	Pokharel, Ashok K.,et al."Dust Climatology of the NASA Dryden Flight Research Center (DFRC) in Lancaster, California, USA".CLIMATE 5.1(2017).