气候变化领域集成服务门户(CCPortal): Horizontal moisture transport dominates the regional moistening patterns in the arctic

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DOI	10.1175/JCLI-D-19-0891.1
	Horizontal moisture transport dominates the regional moistening patterns in the arctic
	Nygård T.; Naakka T.; Vihma T.
发表日期	2020
ISSN	0894-8755
起始页码	6793
结束页码	6807
卷号	33 期号:16
英文摘要	Along with the amplified warming and dramatic sea ice decline, the Arctic has experienced regionally and seasonally variable moistening of the atmosphere. Based on reanalysis data, this study demonstrates that the regional moistening patterns during the last four decades, 1979-2018, were predominantly shaped by the strong trends in horizontal moisture transport. Our results suggest that the trends in moisture transport were largely driven by changes in atmospheric circulation. Trends in evaporation in the Arctic had a smaller role in shaping the moistening patterns. Both horizontal moisture transport and local evaporation have been affected by the diminishing sea ice cover during the cold seasons from autumn to spring. Increases in evaporation have been restricted to the vicinity of the sea ice margin over a limited period during the local sea ice decline. For the first time we demonstrate that, after the sea ice has disappeared from a region, evaporation over the open sea has had negative trends due to the effect of horizontal moisture transport to suppress evaporation. Near the sea ice margin, the trends in moisture transport and evaporation and the cloud response to those have been circulation dependent. The future moisture and cloud distributions in the Arctic are expected to respond to changes in atmospheric pressure patterns; circulation and moisture transport will also control where and when efficient surface evaporation can occur. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Evaporation; Moisture; Sea ice; Atmospheric circulation; Cloud distributions; Cold season; Efficient surface; Moisture transport; Reanalysis; Sea-ice cover; Atmospheric movements; atmospheric circulation; atmospheric moisture; atmospheric pressure; evaporation; ice cover; ice margin; moisture transfer; regional climate; sea ice; trend analysis; warming; Arctic
语种	英语
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/171536
作者单位	Finnish Meteorological Institute, Helsinki, Finland
推荐引用方式 GB/T 7714	Nygård T.,Naakka T.,Vihma T.. Horizontal moisture transport dominates the regional moistening patterns in the arctic[J],2020,33(16).
APA	Nygård T.,Naakka T.,&Vihma T..(2020).Horizontal moisture transport dominates the regional moistening patterns in the arctic.Journal of Climate,33(16).
MLA	Nygård T.,et al."Horizontal moisture transport dominates the regional moistening patterns in the arctic".Journal of Climate 33.16(2020).