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DOI10.1029/2018JD028631
Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska
Qiu, Shaoyue; Xi, Baike; Dong, Xiquan
2018-09-16
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2018
卷号123期号:17页码:9589-9603
文章类型Article
语种英语
国家USA
英文摘要

Seven years of autumnal ground-based observations (September-November 2002-2008) at the U.S. Department of Energy Atmospheric Radiation Measurement North Slope of Alaska site have been analyzed for addressing the occurrence frequency and macrophysical and microphysical properties of Arctic mixed-phase clouds (AMC), as well as the relationship between environmental parameters and AMC properties. In September and October, AMC occurrence frequency is 20-30% lower during a southerly wind when compared to the other wind directions; in November, the variation of AMC occurrence frequency with wind direction is small. The mean liquid water path in November is about half of that in October and September. When the surface is snow free, temperature (T) and specific humidity (q) profiles during a northerly wind are warmer and moister than those for the southerly wind. Northerly wind profiles have a higher relative humidity to ice (RHi) and lower atmosphere stability. Furthermore, the AMC occurrence frequency has a positive relationship with RHi and a negative relationship with stability. These two points may explain the lower AMC occurrence frequency during a southerly wind. During a northerly wind, AMCs have larger radar reflectivity, wider spectrum width, and larger Doppler velocity signatures. The stronger precipitation for AMC during a northerly wind is possibly due to the cleaner air masses from the ocean (north). With the same amount of q, the radar spectrum width has a higher frequency in the larger bins during a northerly wind. Both T, q, and radar reflectivity, radar spectrum width profiles show evidence of deposition in the sub-cloud layer in September and October.


英文关键词Arctic mixed-phase cloud thermodynamic profile wind direction cloud occurrence frequency cloud microphysical processes cloud vertical structure
领域气候变化
收录类别SCI-E
WOS记录号WOS:000445617500038
WOS关键词BOUNDARY-LAYER ; CLIMATE-CHANGE ; ATMOSPHERIC RADIATION ; CONDENSATION NUCLEI ; MODEL SIMULATIONS ; REMOTE SENSORS ; TEMPERATURE ; SURFACE ; AMPLIFICATION ; OCEAN
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/32437
专题气候变化
作者单位Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ 85721 USA
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GB/T 7714
Qiu, Shaoyue,Xi, Baike,Dong, Xiquan. Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(17):9589-9603.
APA Qiu, Shaoyue,Xi, Baike,&Dong, Xiquan.(2018).Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(17),9589-9603.
MLA Qiu, Shaoyue,et al."Influence of Wind Direction on Thermodynamic Properties and Arctic Mixed-Phase Clouds in Autumn at Utqiagvik, Alaska".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.17(2018):9589-9603.
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