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Atmospheric sounding over the winter Kuroshio Extension: Effect of surface stability on atmospheric boundary layer structure
Title: | Atmospheric sounding over the winter Kuroshio Extension: Effect of surface stability on atmospheric boundary layer structure |
Authors: | Tokinaga, Hiroki Browse this author | Tanimoto, Youichi2 Browse this author →KAKEN DB | Nonaka, Masami Browse this author | Taguchi, Bunmei Browse this author | Fukamachi, Tomohiro Browse this author | Xie, Shang-Ping Browse this author | Nakamura, Hisashi Browse this author →KAKEN DB | Watanabe, Tomowo Browse this author | Yasuda, Ichiro Browse this author →KAKEN DB |
Authors(alt): | 谷本, 陽一2 |
Keywords: | Atmospheric Processes | Boundary layer processes | Ocean/atmosphere interactions | Oceanography | Marine meteorology |
Issue Date: | 17-Feb-2006 |
Publisher: | American Geophysical Union |
Journal Title: | Geophysical Research Letters |
Volume: | 33 |
Issue: | 4 |
Start Page: | L04703 |
Publisher DOI: | 10.1029/2005GL025102, 2006 |
Abstract: | Shipboard radiosonde surveys were conducted during the 2003-04 winter east of Japan to study atmospheric boundary layer (ABL) structure over the Kuroshio Extension. ABL displayed large variations in vertical structure, most of which are attributable to changes in atmospheric surface stability. Where the surface atmosphere was unstable (neutral) as measured by the sea-air temperature difference, surface turbulent heat flux increased (decreased) and a mixed-layer developed (undeveloped) with weakened (intensified) vertical wind shear. A linear regression analysis indicates that ABL height tends to increase by 1km as the sea-air temperature difference increases by 7°C or surface turbulent heat flux by 500 Wm−2. While meridional thermal advection by weather disturbances seems to cause much of atmospheric stability variability during the 43-day surveys, the strong sensitivity of vertical mixing and wind shear to stability is consistent with the observed in-phase co-variability of SST and surface wind from satellite on monthly and longer timescales. |
Rights: | An edited version of this paper was published by AGU. Copyright 2006 American Geophysical Union. |
Type: | article |
URI: | http://hdl.handle.net/2115/14460 |
Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 谷本 陽一
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