Radar echo characteristics at Ny-Alesund, Svalbard and Arctic storms over the Norwegian Sea

元データ 国立極地研究所

概要

This paper is a preliminary report on radar echo characteristics and Arctic storms near Svalbard. Using an X-band vertically pointing radar data at Ny-Alesund, Svalbard, Norway and synoptic weather charts, the radar echo characteristics are investigated for one year between April 1994 and March 1995. Radar echoes have distinct seasonal variations with respect to height. Taking account of synoptic conditions, each series of radar echoes is classified into four patterns and it is found that they have strong seasonal variations. The low pressure system echo patterns appear throughout the year; their appearance frequencies exceed 50 of all radar echo appearances and increase in early summer and early winter. The appearance frequencies of low pressure systems over the Norwegian Sea have also characteristic strong seasonal variations. These low pressure activities appear to be related to precipitation behavior at Ny-Alesund and vapor transportation to the high Arctic from lower latitudes.

著者

Wada Makoto National Institute For Polar Research
Asuma Yoshio Division Of Earth And Planetary Sciences Graduate School Of Science Hokkaido University
Asuma Yoshio Division Of Earth & Planetary Science Graduate School Of Science Hokkaido University
Ogitani Nao Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
Ogitani Nao Division Of Earth And Planetary Sciences Graduate School Of Science Hokkaido University
Wada Makoto National Inst. Polar Res. Tokyo
Asuma Yoshio Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University

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