气候变化领域集成服务门户(CCPortal): Spatial Patterns and Trends of Summertime Low Cloudiness for the Pacific Northwest; 1996

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DOI	10.1029/2020GL088121
	Spatial Patterns and Trends of Summertime Low Cloudiness for the Pacific Northwest; 1996–2017
	Dye A.W.; Rastogi B.; Clemesha R.E.S.; Kim J.B.; Samelson R.M.; Still C.J.; Williams A.P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Summertime low clouds are common in the Pacific Northwest (PNW), but spatiotemporal patterns have not been characterized. We show the first maps of low cloudiness for the western PNW and North Pacific Ocean using a 22-year satellite-derived record of monthly mean low cloudiness frequency for May through September and supplemented by airport cloud base height observations. Domain-wide cloudiness peaks in midsummer and is strongest over the Pacific. Empirical orthogonal function (EOF) analysis identified four distinct PNW spatiotemporal modes: oceanic, terrestrial highlands, coastal, and northern coastal. There is a statistically significant trend over the 22-year record toward reduced low cloudiness in the terrestrial highlands mode, with strongest declines in May and June; however, this decline is not matched in the corresponding airport records. The coastal mode is partly constrained from moving inland by topographic relief and migrates southward in late summer, retaining higher late-season low cloud frequency than the other areas. ©2020. The Authors.
英文关键词	Orthogonal functions; Cloud-base height; Empirical orthogonal function analysis; North Pacific Ocean; Pacific Northwest; Spatial patterns; Spatiotemporal patterns; Clouds; cloud cover; empirical orthogonal function analysis; observational method; satellite data; spatiotemporal analysis; summer; topography; trend analysis; Pacific Northwest
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169859
作者单位	Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, United States; USDA Forest Service Corvallis Forestry Sciences Laboratory, Pacific Northwest Research Station, Corvallis, OR, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Dye A.W.,Rastogi B.,Clemesha R.E.S.,等. Spatial Patterns and Trends of Summertime Low Cloudiness for the Pacific Northwest; 1996–2017[J],2020,47(16).
APA	Dye A.W..,Rastogi B..,Clemesha R.E.S..,Kim J.B..,Samelson R.M..,...&Williams A.P..(2020).Spatial Patterns and Trends of Summertime Low Cloudiness for the Pacific Northwest; 1996–2017.Geophysical Research Letters,47(16).
MLA	Dye A.W.,et al."Spatial Patterns and Trends of Summertime Low Cloudiness for the Pacific Northwest; 1996–2017".Geophysical Research Letters 47.16(2020).