文章基本信息

标题：Fog observations with a millimeter-wave scanning radar at Miyoshi basin, Japan
本地全文：下载
作者：Michihiro Teshiba ; Hiroyuki Hashiguchi ; Akihisa Uematsu 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2014
卷号：56
期号：2
页码：259-268
DOI：10.1186/BF03353408
出版社：Springer Verlag
摘要：A special fog observation campaign was conducted in the Miyoshi basin, Hiroshima prefecture, Japan during the period November 7–15, 2000. We observed the spatial distributions of fogs and their movements using a millimeter-wave scanning radar. This is the first time that the distribution of basin fogs associated with fog development and decay processes has been examined. Echo intensity observed with the radar, which is mainly associated with fog particle size, was almost under −23 dBZ at levels below 200 m in height. The horizontal distribution of echo intensity changed with time. Namely, weak echoes were observed over nearly all observation areas at first, and then the echoes gradually became stronger as the fogs developed, although the echoes were weaker at higher levels. After sunrise, the echoes decayed. During the developing periods, the occurrence ratio of the echo intensity between −38 and −23 dBZ increased from the lower height, while the ratio decreased from the higher levels during the decay periods. This feature in the developing period is consistent with the results of optical measurements but the feature in the decaying period is inconsistent. It is suggested that this inconsistency is due to the difference in sensitivity between the two measurement approaches.
关键词：Fog; remote sensing; millimeter-wave radar; mesoscale meteorology; boundary layer meteorology