Influences of the geographical factor on the local wind system in Japan

地理因素对日本当地风系统的影响

• 批准号: 03640378
• 负责人: KAWAMURA Takeshi
• 金额: $ 1.41万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640378/
• 关键词: land and sea breeze; local wind system; sea surface temperature; Japan; Kanto Plain; surface inversion layer; LIDAR; calm condition; 総観規模; 海面温度

Since the Japan Islands are surrounded by seas, the Land and Sea Breeze (LSB) plays an important role in the local wind system. However previous studies have paid attention to LSBs in some regional areas in Japan, using respective definitions of the LSB and wind data. Therefore, we could not compare the characteristics of the LSB of individual area from the same point of view. In this regard, we attempted to investigate the LSB in the whole Japan using a same method and data, and obtained results that was possible to discuss the regionality of the LSB.The influence of the Baiu, a rainy season (mainly in June) experienced in the pacific side of north Japan, makes a great contrast of annual change of the LSB frequency between west and east Hokkaido: the maximum frequency appeares in June in west Hokkaido, while the frequency in June is significantly low in east Hokkaido.The present study focused on the coastal Sea Surface Temperature (SST) that is one of the important geographical factors affected on the LSB. An obvious relationships were found between the LSB and the temperature difference between the SST and air temperature over ground. For example, the alternation of the LSB well corresponds to the time when the temperature difference between the SST and air temperature reverses.Calm is a meteorological condition having no wind or very weak wind. In this study, the distribution and the annual change of the frequency of the calm condition was statistically investigated over the Kanto Plain. In the result, it was revealed that the maximum frequency (40%) appears in July at 0300JST. At 1500JST, the appearing frequency is low and the frequency is nearly constant throughout the year.In this study, a field experiment of the boundary layer, that was stably startified during nighttime, was conducted using LIDAR. This experiment demonstrated the relationship between the stability and the concentration of aerosol.

由于日本列岛四面环海，陆风和海风（LSB）在当地的风系统中起着重要的作用。然而，以前的研究已经注意到在日本的一些区域的LSB，使用各自的定义的LSB和风数据。因此，我们无法从同一角度比较各个区域的LSB特性。在这方面，我们尝试使用相同的方法和数据调查整个日本的LSB，并获得了可能讨论LSB的区域性的结果。（主要在6月），使得北海道东西部LSB频率的年变化形成了鲜明的对比：北海道西部6月出现最高频率，而北海道东部6月出现最低频率。LSB与SST和地面气温的温差有明显的相关关系。例如，LSB的交替很好地对应于SST和气温之间的温差反转的时间。平静是没有风或风很弱的气象条件。本研究对关东平原的静风频率的分布和年际变化进行了统计分析。结果表明，7月0300JST出现最高频率（40%）。在1500 JST，出现的频率低，频率几乎是一个恒定的全年。在这项研究中，使用激光雷达进行了一个现场实验的边界层，这是稳定的startified夜间。实验证明了稳定性与气溶胶浓度的关系。

项目成果

Rikie Suzuki and Takeshi Kawamura: "A statsitical analysis on the influence of the synoptic pressure gradient upon land and sea breeze" Abstracts of the Japan Meteorological Society Meeting. 61. 283 (1992)

Rikie Suzuki 和 Takeshi Kawamura：“天气压力梯度对陆地和海风影响的统计分析”日本气象学会会议摘要。

鈴木 力英: "関東地方における静穏の季節性・地域性" 日本地理学会予稿集. 40. 68-69 (1991)

Rikihide Suzuki：“关东地区宁静的季节和区域特征”日本地理学会学报40。68-69（1991）。

鈴木 力英,河村 武: "総観規模の気圧傾度が海陸風に及ぼす影響の統計解析" 1992年日本気象学会春季大会講演予稿集. 61. 283-283 (1992)

Rikihide Suzuki、Takeshi Kawamura：“天气尺度气压梯度对海陆风影响的统计分析”日本气象学会 1992 年春季会议记录 61. 283-283 (1992)。

鈴木 力英・河村 武・中山 慶一: "日本全国における海陸風の統計解析" 日本地理学会予稿集. 41. 94-95 (1992)

Rikihide Suzuki、Takeshi Kawamura 和 Keiichi Nakayama：“日本各地陆地和海洋风的统计分析”日本地理学会会议记录 41. 94-95 (1992)。

鈴木 力英: "関東地方における静穏出現の季節性・地域性" 1991年日本気象学会秋季大会講演予稿集. 60. 119-119 (1991)

Rikihide Suzuki：“关东地区平静出现的季节和区域特征”日本气象学会 1991 年秋季会议记录 60. 119-119 (1991)。