期刊
JOURNAL OF CLIMATE
卷 21, 期 22, 页码 5960-5975出版社
AMER METEOROLOGICAL SOC
DOI: 10.1175/2008JCLI2311.1
关键词
-
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [17740305, 20740267]
- Japan Society for the Promotion of Science [17340137]
- Japan Agency for Marine-Earth Science and Technology
- U. S. National Aeronautic and Space Administration and National Science Foundation
- Grants-in-Aid for Scientific Research [17740305, 20740267, 17340137] Funding Source: KAKEN
The North Pacific subtropical front (STF) is a zone of high sea surface temperature (SST) gradients located around 25 degrees N in the western basin and is most pronounced in spring. The STF's atmospheric effects are investigated using satellite observations and an atmospheric reanalysis. During April-May along the STF, surface wind stress curl turns weakly cyclonic in the general background of anticyclonic curls. Atmospheric column-integrated water vapor displays a pronounced meridional maximum along this surface trough, suggesting a deep vertical structure. Cyclonic wind curls occur intermittently at intervals of a few days along the STF in subsynoptic low pressure systems accompanying larger, synoptic highs in the main storm track to the north. In the subsynoptic surface lows, convective rain takes place with deep upward motion moistening the entire troposphere. The lows are enhanced by condensational heating, leading to the formation of weak cyclonic wind curls. The lows display vertical structure characteristic of baroclinic instability, suggesting that they are triggered by the passage of synoptic migratory highs and grow on the baroclinicity anchored by the SST front. The cyclonic wind curls appear to be related to a cloud/rainband associated with the so-called pre-baiu/meiyu front in May.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据