气候变化领域集成服务门户(CCPortal): Blowing Snow at McMurdo Station, Antarctica During the AWARE Field Campaign: Surface and Ceilometer Observations

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DOI	10.1029/2020JD033935
	Blowing Snow at McMurdo Station, Antarctica During the AWARE Field Campaign: Surface and Ceilometer Observations
	Loeb N.A.; Kennedy A.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Blowing snow (BLSN) is an impactful process in cold climates, affecting regional thermodynamics, radiation properties, and the surface mass balance of snow. Though it has significant climatic impacts, the process is still poorly understood and not widely included in weather and climate models. In 2016, the AWARE Field Campaign saw the deployment of a large suite of in situ and remote sensing instruments to McMurdo Station, Antarctica allowing for investigation of BLSN. A ceilometer-based BLSN detection algorithm used elsewhere in Antarctica is applied to data from AWARE, yielding a BLSN frequency of 14.1% compared to 8.2% as detected by human observers. To increase confidence in detections, the algorithm is updated to have shorter temporal averaging and to include a variety of meteorological thresholds to limit false detections due to fog. Efforts to incorporate a laser disdrometer into the algorithm were unsuccessful. An unphysical dependence of particle size distributions on wind speed is found suggesting observations are problematic at wind speeds greater than 10 m s−1. The revised algorithm detected a BLSN frequency of 7.4%, increasing agreement with human observations and confidence that the process is actively occurring at the observation site. These observations are put into context of a climatology of human observations of BLSN at McMurdo station from 2002–2018. An annual average of 8.0%–14.0% is estimated, with a total annual range of 3.4%–21.3%. Regardless of whether BLSN is observed by humans or instrument, the majority of cases at this location are associated with ongoing precipitation. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	AWARE; blowing snow; ceilometer; lidar; McMurdo station
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/185366
作者单位	Department of Environment and Geography, University of Manitoba, Winnipeg, MB, Canada; Department of Atmospheric Sciences, University of North Dakota, Grand Forks, ND, United States
推荐引用方式 GB/T 7714	Loeb N.A.,Kennedy A.. Blowing Snow at McMurdo Station, Antarctica During the AWARE Field Campaign: Surface and Ceilometer Observations[J],2021,126(7).
APA	Loeb N.A.,&Kennedy A..(2021).Blowing Snow at McMurdo Station, Antarctica During the AWARE Field Campaign: Surface and Ceilometer Observations.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Loeb N.A.,et al."Blowing Snow at McMurdo Station, Antarctica During the AWARE Field Campaign: Surface and Ceilometer Observations".Journal of Geophysical Research: Atmospheres 126.7(2021).