Editing Polar low (section)

==Frequency and impact==
[[File:Polar low.jpg|thumb|A polar low over the [[Barents Sea]] in February 1987]]
Although cyclonic activity is most prevalent in the Eurasian Arctic with approximately 15 lows per winter, polar lows also occur in [[Greenland]] and the [[Canada|Canadian]] Arctic. Polar lows occur in the extended winter season, with seldom occurrences during the summer. They are not well studied and seldom destructive as they typically take place in sparsely populated areas. The only infrastructure damage that occurs as a direct result of a polar low is to oil and gas rigs present throughout the Antarctic Ocean (sometimes known as the [[Southern Ocean]]). Some cargo and shipping vessels are also affected, although there are minimal or no reports of losses in recent years as the result of a polar low.

Despite the more equatorward location, numerous polar lows can form over the [[Sea of Japan]] every year, due to the [[:ja:日本海寒帯気団収束帯|Japan-Sea Polar-Airmass Convergence Zone]] (JPCZ) contributed by the [[cold-core low]] aloft and the warm [[Kuroshio Current|Tsushima Current]]. They would bring severe impacts to [[Japan]] owing to the proximity to populous regions, with strong winds and heavy snowfall. On December 28, 1986, seven passenger cars of a railway train were blown from the [[Amarube Viaduct]] due to a polar low, causing six deaths.<ref>{{Cite web|url=http://dpo.aori.u-tokyo.ac.jp/dmmg/people/yanase/polarlow/polarlow.html|script-title=ja:ポーラーロウ ～冬の海上の不思議なうずまき～|last=Yanase|first=Wataru|title=Polar Low |date=December 14, 2016|publisher=[[University of Tokyo]]|language=ja|access-date=January 14, 2018}}</ref>