Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0104.1 |
Interannual Variability of the North American Cold Air Stream and Associated Synoptic Circulations | |
Kanno, Yuki1; Walsh, John E.2; Iwasaki, Toshiki1 | |
2017-12-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA |
英文摘要 | In boreal winter, the cold air mass (CAM) flux of air with a potential temperature below 280K forms climatological mean CAM streams in East Asia and North America (NA). This study diagnoses the interannual variability of the NA stream by an analysis of the CAM flux across 60 degrees N between Greenland and the Rocky Mountains. The first empirical orthogonal function (EOF) represents the variations in intensity of the NA stream. When the first principal component (PC1) is highly positive, the central part of the NA stream is intensified, with cold anomalies east of the Rocky Mountains. At the same time, a stratospheric polar vortex tends to split or displace toward NA. PC1 is highly correlated with the tropical Northern Hemisphere pattern, implying that this pattern is associated with the intensity of the NA stream. The second EOF shows a longitudinal shift of the NA stream toward Greenland or the Rocky Mountains. A highly negative PC2 results in a cold anomaly from western Canada to the Midwestern United States and anomalous heavy snowfall in the northeastern United States. PC2 is positively correlated with the Arctic Oscillation, which suggests that the longitudinal position of the NA stream varies with the Arctic Oscillation. These results illustrate how the intensity and location of cold air outbreaks vary with large-scale modes of atmospheric variability, with corresponding implications for the predictability of winter severity in NA. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416489400015 |
WOS关键词 | GEOPOTENTIAL HEIGHT ; UNITED-STATES ; ATLANTIC OSCILLATION ; ISENTROPIC ANALYSIS ; HEMISPHERE WINTER ; SCALE CIRCULATION ; POLAR VORTEX ; OUTBREAKS ; PLANETARY ; EAST |
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/19634 |
专题 | 气候变化 |
作者单位 | 1.Tohoku Univ, Grad Sch Sci, Dept Geophys, Sendai, Miyagi, Japan; 2.Univ Alaska Fairbanks, Alaska Ctr Climate Assessment & Policy, Fairbanks, AK USA |
推荐引用方式 GB/T 7714 | Kanno, Yuki,Walsh, John E.,Iwasaki, Toshiki. Interannual Variability of the North American Cold Air Stream and Associated Synoptic Circulations[J]. JOURNAL OF CLIMATE,2017,30(23). |
APA | Kanno, Yuki,Walsh, John E.,&Iwasaki, Toshiki.(2017).Interannual Variability of the North American Cold Air Stream and Associated Synoptic Circulations.JOURNAL OF CLIMATE,30(23). |
MLA | Kanno, Yuki,et al."Interannual Variability of the North American Cold Air Stream and Associated Synoptic Circulations".JOURNAL OF CLIMATE 30.23(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论