Analysis of the Strong Local Wind in Northwestern Hokkaido, Japan
Analysis of the Strong Local Wind in Northwestern Hokkaido, Japan
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DOI：
10.7886/hgs.92.17
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发表时间：
2018-03
影响因子：
0.3
通讯作者：
K. Kasai;K. Kimura;K. Shiomi;Atsushi Konno;T. Tadono;M. Hori
中科院分区：
文献类型：
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作者：
K. Kasai;K. Kimura;K. Shiomi;Atsushi Konno;T. Tadono;M. Hori
风是由空气的大量运动构成的.在中气候学和小气候学领域，有必要了解β中尺度风的分布，以解释温度和降水的分布（Kawamura，1963）。川村（1966，1981）在日本进行的一项大面积研究中，调查了日本中部和关东平原的风分布。在上述研究中，地面风场分布是由盛行风向估计，并根据最频繁风向的风玫瑰图确定。Suzuki（1991，1992）利用地面观测数据，重点研究日本中部的风，以阐明地面风速和风向对天气气压梯度的响应。在这些研究中，人们认识到，观测到的风既包括天气压力梯度的影响，也包括局地环流的影响。本研究的重点是分析日本北海道留萌地区的风速和风向（图1）。日本主要位于温带气候区，但北海道和东北地区位于温带和亚北极气候之间的主要过渡带（加塞和Kimura，2013年）。因此，北海道经历了亚北极气候，冬季大部分地区被积雪覆盖。Kawamura（1963）研究了北海道的地面风分布，并将冬季的大尺度流型分为8种类型。Rumoi地区的风从W或ESE方向吹来。Kato（1983）使用主成分分析法分析了每日平均风速和表面气压数据，以调查北海道的风分布。作者认为，W和ESE风吹Rumoi分别作为第一和第三主成分。Suzuki（1994）还分析了日本周边沿海地区（包括Rumoi）的地面风;日本北海道西北部强局地风的方向分析
Wind consists of the bulk movement of air. In the fields of mesoclimatology and microclimatology, it is necessary to gain an understanding of the distribution of meso-β scale winds to explain the distribution of temperature and precipitation (Kawamura, 1963). In a study conducted over a large area in Japan, Kawamura (1966, 1981) investigated the distribution of winds over central Japan and the Kanto Plain. In the above-mentioned previous studies, the surface wind distribution was estimated by the prevailing wind direction, and determined according to wind roses of the most frequent wind direction. Suzuki (1991, 1992) used ground-based observation data and focused on the wind over central Japan to clarify the response of surface wind speed and direction to the synoptic pressure gradient. In these studies, it is acknowledged that the observed wind includes both the effect of synoptic pressure gradient and that of local circulation. The present study focuses on an analysis of wind speed and wind direction in the area of Rumoi, Hokkaido, Japan (Fig. 1). Japan lies predominantly within the temperate climate zone, but the Hokkaido and Tohoku regions lie on the main transition band between temperate and subarctic climates (Kasai and Kimura, 2013). Therefore, Hokkaido experiences a subarctic climate, and most of the region is covered with snow in winter. Kawamura (1963) investigated the surface wind distribution in Hokkaido, and classified eight types of large-scale flow patterns during winter. Winds in the area of Rumoi blow from W or ESE direction. Kato (1983) analyzed daily mean wind speed and surface pressure data using a principal component analysis to investigate the wind distribution in Hokkaido. The author suggested that W and ESE winds blew over Rumoi as the primary and third principal component, respectively. Suzuki (1994) also analyzed the surface wind over the coastal area surrounding Japan (including Rumoi); the direction Analysis of the Strong Local Wind in Northwestern Hokkaido, Japan