globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025656
论文题名:
Evolution of the upper tropospheric outflow in Hurricanes Iselle and Julio (2014) in the Navy Global Environmental Model (NAVGEM) analyses and in satellite and dropsonde observations
作者: Barrett B.S.; Sanabia E.R.; Reynolds S.C.; Stapleton J.K.; Borrego A.L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:22
起始页码: 273
结束页码: 286
语种: 英语
英文关键词: inertial stability ; outflow ; tropical cyclone
Scopus关键词: atmospheric motion ; climate modeling ; hurricane ; NOAA satellite ; observational method ; outflow ; subtropical region ; troposphere ; Pacific Ocean
英文摘要: Upper tropospheric outflow was examined during the life cycles of two hurricanes in the eastern and central Pacific Ocean. The outflow from Hurricanes Iselle and Julio was evaluated by using analyses from the Navy Global Environmental Model, which were very highly correlated with satellite atmospheric motion vector and NOAA G-IV dropsonde observations. A synoptic overview provided the environmental context for the life cycles of both tropical cyclones (TCs). Then, the outflow magnitude and direction within 6 radial degrees of each TC center were analyzed in relation to TC intensity, the synoptic environment, and inertial stability, with the following results. In both Iselle and Julio, the azimuthally averaged outflow magnitude was maximized initially more than 4 radial degrees from the center, and that maximum moved steadily inward during a 4 day intensification period and reached a position radially inward of 2° within 6 h of the time of maximum surface winds. Furthermore, the direction of the outflow in both TCs was related to the evolution of the large-scale upper tropospheric flow pattern, particularly the phasing of subtropical jet ridges and troughs moving eastward north of both TCs. Finally, outflow channels were consistently bounded by regions of lowest (highest) values of inertial stability counterclockwise (clockwise) from the maximum outflow azimuth, a pattern that persisted throughout the life cycles of both storms regardless of intensity, environmental flow, and the number and direction of outflow channels present. Published 2016. This article is a US Government work and is in the public domain in the United States of America.
资助项目: N0001415WX01688
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62790
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Oceanography Department, U.S. Naval Academy, Annapolis, MD, United States

Recommended Citation:
Barrett B.S.,Sanabia E.R.,Reynolds S.C.,et al. Evolution of the upper tropospheric outflow in Hurricanes Iselle and Julio (2014) in the Navy Global Environmental Model (NAVGEM) analyses and in satellite and dropsonde observations[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(22)
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