气候变化领域集成服务门户(CCPortal): Contributions to the Surface Downwelling Longwave Irradiance during Arctic Winter at Utqia-gvik (Barrow), Alaska

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DOI	10.1175/JCLI-D-18-0876.1
	Contributions to the Surface Downwelling Longwave Irradiance during Arctic Winter at Utqia-gvik (Barrow), Alaska
	Sokolowsky G.A.; Sokolowsky G.A.; Clothiaux E.E.; Baggett C.F.; Baggett C.F.; Baggett C.F.; Lee S.; Feldstein S.B.; Eloranta E.W.; Cadeddu M.P.; Bharadwaj N.; Johnson K.L.
发表日期	2020
ISSN	08948755
起始页码	4555
结束页码	4577
卷号	33 期号:11
英文摘要	Intrusions of warm, moist air into the Arctic during winter have emerged as important contributors to Arctic surface warming. Previous studies indicate that temperature, moisture, and hydrometeor enhancements during intrusions allmake contributions to surface warming via emission of radiation down to the surface. Here, datasets from instrumentation at the Atmospheric Radiation Measurement User Facility in Utqia_gvik (formerly Barrow) for the six months from November through April for the six winter seasons of 2013/14-2018/19 were used to quantify the atmospheric state. These datasets subsequently served as inputs to compute surface downwelling longwave irradiances via radiative transfer computations at 1-min intervals with different combinations of constituents over the six winter seasons. The computed six winter average irradiance with all constituents included was 205.0Wm22, close to the average measured irradiance of 206.7Wm22, a difference of 20.8%. During this period, water vapor was the most important contributor to the irradiance. The computed average irradiance with dry gas was 71.9Wm22. Separately adding water vapor, liquid, or ice to the dry atmosphere led to average increases of 2.4, 1.8, and 1.6 times the dry atmosphere irradiance, respectively. During the analysis period, 15 episodes of warm, moist air intrusions were identified. During the intrusions, individual contributions from elevated temperature, water vapor, liquid water, and ice water were found to be comparable to each other. These findings indicate that all properties of the atmospheric state must be known in order to quantify the radiation coming down to the Arctic surface during winter. © 2020 American Meteorological Society. All rights reserved.
语种	英语
scopus关键词	Atmospheric radiation; Atmospheric radiation measurements; Down-welling; Dry atmospheres; Elevated temperature; Liquid water; Surface warming; Transfer computation; Winter seasons; Water vapor; data set; irradiation; longwave radiation; warming; water vapor; winter; Alaska; Barrow; United States
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178730
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, United States; NWS/NCEP/Climate Prediction Center, College Park Innovim, LLC, Maryland, United States; Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI, United States; Climate and Atmospheric Science Department, National Laboratory, Environmental Science Division, Argonne, Lemont, IL, United States; Pacific Northwest National Laboratory, Atmospheric Measurement and Data Sciences, Richland, WA, United States; Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, United States
推荐引用方式 GB/T 7714	Sokolowsky G.A.,Sokolowsky G.A.,Clothiaux E.E.,et al. Contributions to the Surface Downwelling Longwave Irradiance during Arctic Winter at Utqia-gvik (Barrow), Alaska[J],2020,33(11).
APA	Sokolowsky G.A..,Sokolowsky G.A..,Clothiaux E.E..,Baggett C.F..,Baggett C.F..,...&Johnson K.L..(2020).Contributions to the Surface Downwelling Longwave Irradiance during Arctic Winter at Utqia-gvik (Barrow), Alaska.Journal of Climate,33(11).
MLA	Sokolowsky G.A.,et al."Contributions to the Surface Downwelling Longwave Irradiance during Arctic Winter at Utqia-gvik (Barrow), Alaska".Journal of Climate 33.11(2020).