Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0411.1 |
Formation Mechanisms of the Pacific-North American Teleconnection with and without Its Canonical Tropical Convection Pattern | |
Dai, Ying1; Feldstein, Steven B.2; Tan, Benkui1; Lee, Sukyoung2,3 | |
2017-05-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; South Korea |
英文摘要 | mechanisms that drive the Pacific-North American (PNA) teleconnection pattern with and without its canonical tropical convection pattern are investigated with daily ERA-Interim and NOAA OLR data (the former pattern is referred to as the convective PNA, and the latter pattern is referred to as the nonconvective PNA). Both the convective and nonconvective positive PNA are found to be preceded by wave activity fluxes associated with a Eurasian wave train. These wave activity fluxes enter the central subtropical Pacific, a location that is favorable for barotropic wave amplification, just prior to the rapid growth of the PNA. The wave activity fluxes are stronger for the positive nonconvective PNA, suggesting that barotropic amplification plays a greater role in its development. The negative convective PNA is also preceded by a Eurasian wave train, whereas the negative nonconvective PNA grows from the North Pacific contribution to a circumglobal teleconnection pattern. Driving by high-frequency eddy vorticity fluxes is largest for the negative convective PNA, indicating that a positive feedback may be playing a more dominant role in its development. The lifetimes of convective PNA events are found to be longer than those of nonconvective PNA events, with the former (latter) persisting for about three (two) weeks. Furthermore, the frequency of the positive (negative) convective PNA is about 40% (60%) greater than that of the positive (negative) nonconvective PNA. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399680500004 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; CIRCULATION ANOMALIES ; LIFE-CYCLES ; STORM TRACKS ; VARIABILITY ; HEMISPHERE ; ATMOSPHERE ; WINTER ; MJO ; CLASSIFICATION |
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/20651 |
专题 | 气候变化 |
作者单位 | 1.Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing, Peoples R China; 2.Penn State Univ, Dept Meteorol, 503 Walker Bldg, University Pk, PA 16802 USA; 3.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea |
推荐引用方式 GB/T 7714 | Dai, Ying,Feldstein, Steven B.,Tan, Benkui,et al. Formation Mechanisms of the Pacific-North American Teleconnection with and without Its Canonical Tropical Convection Pattern[J]. JOURNAL OF CLIMATE,2017,30(9). |
APA | Dai, Ying,Feldstein, Steven B.,Tan, Benkui,&Lee, Sukyoung.(2017).Formation Mechanisms of the Pacific-North American Teleconnection with and without Its Canonical Tropical Convection Pattern.JOURNAL OF CLIMATE,30(9). |
MLA | Dai, Ying,et al."Formation Mechanisms of the Pacific-North American Teleconnection with and without Its Canonical Tropical Convection Pattern".JOURNAL OF CLIMATE 30.9(2017). |
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