Structure of Convective Circulation in the Atmospheric Boundary Layer over the Northwestern Pacific Ocean under a Subtropical High
Structure of Convective Circulation in the Atmospheric Boundary Layer over the Northwestern Pacific Ocean under a Subtropical High
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副热带高压作用下西北太平洋大气边界层对流环流结构
DOI：
10.2151/jmsj.87.979
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发表时间：
2009
影响因子：
3.1
通讯作者：
K. Nakamura
中科院分区：
文献类型：
--
作者：
T. Shinoda;A. Higuchi;K. Tsuboki;T. Hiyama;Hiroki Tanaka;S. Endo;H. Minda;H. Uyeda;K. Nakamura
为了确定副热带高压作用下西北太平洋日本西南诸岛附近大气边界层对流环流的结构，我们于2002年8月利用探空仪和航空探空仪进行了密集观测和高分辨率三维数值模拟。在观测期间，在0.7 km以下存在混合良好的亚云层。位温异常与水汽混合比的相关系数绝对值在低层主要很小（小于0.3）。在0.1 km高度出现正相关系数的频率仅为46%。这表明在较低的亚云层中存在较少的暖湿热气流。100 m水平网格分辨率模拟结果显示，上升气流区存在湿气团。这些热气流是由正浮力通量驱动的，而这种正浮力是由水分（即水蒸气和干燥空气中的密度异常）而不是热量贡献的。这可能是由于海气温差小，海面提供的感热通量小，潜热通量丰富。
To confirm the structure of convective circulation in the atmospheric boundary layer (ABL) over the northwestern Pacific Ocean around the Southwest Islands of Japan under a subtropical high, we perform intensive observations using radiosonde and Aerosonde in August 2002 and high-resolution three-dimensional numerical simulations. A well-mixed subcloud layer exists below 0.7 km during the observation period. The absolute values of the correlation coefficient between anomalies in potential temperature and mixing ratio of water vapor are mainly small (less than 0.3) in the lower subcloud layer. The frequency of a positive correlation coefficient at a height of 0.1 km is only 46%. This suggests that fewer warm moist thermals exist in the lower subcloud layer.The simulation results using 100-m horizontal grid resolution show a moist air mass in updraft regions. These thermals are driven by positive buoyant flux, and this positive buoyancy is contributed by moisture, i.e., density anomalies in water vapor and dry air, instead of heat. This should be attributed to the supply of small sensible and abundant latent heat fluxes from the sea surface under the small air-sea temperature difference.
影响因子：
3.1
作者：
H. Yamada;B. Geng;H. Uyeda;K. Tsuboki
通讯作者：
H. Yamada;B. Geng;H. Uyeda;K. Tsuboki
冷空气爆发期间日本海上游地区气团变化的飞机观测
DOI：
--
发表时间：
2005
期刊：
J.Meteor.Soc.Japan 83(印刷中)
影响因子：
--
作者：
Inoue;J.;M.Kawashima;Y.Fujiyoshi;M.Yoshizaki
通讯作者：
M.Yoshizaki
影响因子：
3.2
作者：
S. Shimizu;H. Uyeda;Q. Moteki;T. Maesaka;Yoshimasa Takaya;K. Akaeda;T. Kato;M. Yoshizaki
通讯作者：
S. Shimizu;H. Uyeda;Q. Moteki;T. Maesaka;Yoshimasa Takaya;K. Akaeda;T. Kato;M. Yoshizaki