Influence of the Kuroshio on Mesoscale Convective Systems in the Baiu Frontal Zone over the East China Sea

Author:

Sato Kazutoshi12,Manda Atsuyoshi3,Moteki Qoosaku4,Komatsu Kensuke K.5,Ogata Koto5,Nishikawa Hatsumi5,Oshika Miki5,Otomi Yuriko5,Kunoki Shiori1,Kanehara Hisao6,Aoshima Takashi6,Shimizu Kenichi6,Uchida Jun6,Shimoda Masako6,Yagi Mitsuharu6,Minobe Shoshiro7,Tachibana Yoshihiro5

Affiliation:

1. Department of Earth on Environmental Sciences, Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan

2. Graduate University for Advanced Studies, Tachikawa, Japan

3. Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki, Japan

4. Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan

5. Climate and Ecosystem Dynamics Division, Mie University, Tsu, Japan

6. Faculty of Fisheries, Nagasaki University, Nagasaki, Japan

7. Graduate School of Science, Hokkaido University, Sapporo, Japan

Abstract

Abstract Two mesoscale convective events in the baiu frontal zone (BFZ) were documented, based on intensive atmospheric soundings and oceanic castings in the East China Sea during May 2011, in addition to continuous surface meteorological observations, satellite products, and objective analyses. These events occurred while the BFZ was nearly stagnant and a mesolow was deepening in the zone. Near-surface southerlies associated with the low-level jet transported a warm, humid air mass from south of the BFZ. Enhanced evaporation, which was mainly attributable to the high sea surface temperature of the Kuroshio, augmented the moisture content of the air mass and helped maintain a convectively unstable stratification in the lower troposphere around the BFZ.

Publisher

American Meteorological Society

Subject

Atmospheric Science

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