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DOI | 10.1175/JCLI-D-19-0242.1 |
Strong Dependence of Wintertime Arctic Moisture and Cloud Distributions on Atmospheric Large-Scale Circulation | |
Nygard, Tiina1; Graversen, Rune G.2; Uotila, Petteri3; Naakka, Tuomas1; Vihma, Timo1 | |
2019-12-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:24页码:8771-8790 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; Norway |
英文摘要 | This study gives a comprehensive picture of how atmospheric large-scale circulation is related to moisture transport and to distributions of moisture, clouds, and surface downward longwave radiation in the Arctic in winter. Anomaly distributions of the abovementioned variables are compared in 30 characteristic wintertime atmospheric circulation regimes, which are allocated from 15 years (2003-17) of mean sea level pressure data of ERA-Interim reanalysis applying the self-organizing map method. The characteristic circulation regimes are further related to known climate indices-the North Atlantic Oscillation (NAO), the Arctic Oscillation (AO), and Greenland blocking index-as well as to a frequent high pressure pattern across the Arctic Ocean from Siberia to North America, herein called the Arctic bridge. Effects of large-scale circulation on moisture, cloud, and longwave radiation are to a large extent occurring through the impact of horizontal moisture transport. Evaporation is typically not efficient enough to shape those distributions, and much of the moisture evaporated in the Arctic is transported southward. The positive phase of the NAO and AO increases moisture and clouds in northern Europe and the eastern North Atlantic Ocean, and a strong Greenland blocking typically increases those in the southwest of Greenland. When the Arctic bridge is lacking, the amount of moisture, clouds, and downward longwave radiation is anomalously high near the North Pole. Our results reveal a strong dependence of moisture, clouds, and longwave radiation on atmospheric pressure fields, which also appears to be important from a climate change perspective. |
英文关键词 | Arctic Atmospheric circulation Clouds Moisture moisture budget Water vapor Reanalysis data |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000501234400002 |
WOS关键词 | SEA-ICE LOSS ; CLIMATE-CHANGE ; TRANSPORT ; RADIATION ; AMPLIFICATION ; 21ST-CENTURY ; OSCILLATION ; ATTRIBUTION ; DECLINE ; MASS |
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/225667 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Finnish Meteorol Inst, Helsinki, Finland; 2.Univ Tromso, Dept Phys & Technol, Tromso, Norway; 3.Univ Helsinki, Inst Atmospher & Earth Syst Res Phys, Helsinki, Finland |
推荐引用方式 GB/T 7714 | Nygard, Tiina,Graversen, Rune G.,Uotila, Petteri,et al. Strong Dependence of Wintertime Arctic Moisture and Cloud Distributions on Atmospheric Large-Scale Circulation[J]. JOURNAL OF CLIMATE,2019,32(24):8771-8790. |
APA | Nygard, Tiina,Graversen, Rune G.,Uotila, Petteri,Naakka, Tuomas,&Vihma, Timo.(2019).Strong Dependence of Wintertime Arctic Moisture and Cloud Distributions on Atmospheric Large-Scale Circulation.JOURNAL OF CLIMATE,32(24),8771-8790. |
MLA | Nygard, Tiina,et al."Strong Dependence of Wintertime Arctic Moisture and Cloud Distributions on Atmospheric Large-Scale Circulation".JOURNAL OF CLIMATE 32.24(2019):8771-8790. |
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