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.

由于日本群岛被海洋包围，因此陆地和海风（LSB）在当地风系统中起着重要作用。然而，使用LSB和风数据的定义，以前的研究已关注日本某些区域地区的LSB。因此，我们无法从同一角度比较单个区域的LSB的特征。在这方面，我们试图使用相同的方法和数据来调查整个日本的LSB，并获得了讨论LSB区域性的结果，Baiu的影响是在日本北部太平洋地区经历的雨季（主要是6月），在北部和East Hokkaido之间的年度频率很大的频率在何时又与何时频繁的频率相反：在东北海道，目前的研究重点是沿海海面温度（SST），这是LSB影响的重要地理因素之一。在地面上的SST和空气温度之间发现了LSB与温度差之间的明显关系。例如，LSB井的交替对应于SST和空气温度逆转之间的温度差的时间。CALM是一个没有风或非常微弱的气象条件。在这项研究中，对镇定状况的平静状况频率的分布和年变化在关东平原上进行了统计研究。结果，据揭示了最大频率（40％）在7月份在0300Jst出现。在1500JST时，出现频率很低，并且全年几乎恒定。在这项研究中，使用LIDAR进行了边界层的一个现场实验，在夜间稳定启动。该实验证明了气溶胶的稳定性与浓度之间的关系。

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)。

Rikie Suzuki, Takeshi Kawamura and Keiichi Nakayama: "A statistical study on the land and sea breeze in Japan" Abstracts of the Association of Japanese Geographers Meeting. 41. 94-95 (1992)

Rikie Suzuki、Takeshi Kawamura 和 Keiichi Nakayama：“日本陆地和海风的统计研究”日本地理学家协会会议摘要。