翻訳と辞書
Words near each other
・ Squalius malacitanus
・ Squalius microlepis
・ Squalius peloponnensis
・ Squalius prespensis
・ Squalius pyrenaicus
・ Squalius spurius
・ Squalius squalus
・ Squalius svallize
・ Squalius torgalensis
・ Squalius valentinus
・ Squalius zrmanjae
・ Squall
・ Squall (disambiguation)
・ Squall (NCIS)
・ Squall Leonhart
Squall line
・ Squallis Puppeteers
・ Squallor
・ Squalo-class submarine
・ Squalodon
・ Squalodontidae
・ Squalogadus modificatus
・ Squaloliparis dentatus
・ Squalomorphii
・ Squalor
・ Squalor (comics)
・ Squaloraja
・ Squalus formosus
・ Squalus montalbani
・ Squalus philippinus


Dictionary Lists
翻訳と辞書 辞書検索 [ 開発暫定版 ]
スポンサード リンク

Squall line : ウィキペディア英語版
Squall line

A squall line is a line of thunderstorms that can form along or ahead of a cold front. In the early 20th century, the term was used as a synonym for cold front. It contains heavy precipitation, hail, frequent lightning, strong straight-line winds, and possibly tornadoes and waterspouts. Strong straight-line winds can occur where the squall line is in the shape of a bow echo. Tornadoes can occur along waves within a line echo wave pattern (LEWP), where mesoscale low pressure areas are present. Some bow echoes which develop within the summer season are known as derechos, and they move quite fast through large sections of territory. On the back edge of the rain shield associated with mature squall lines, a wake low can be present, sometimes associated with a heat burst.
==Theory==
Polar front theory was developed by Jacob Bjerknes, derived from a dense network of observation sites in Scandinavia during World War I. This theory proposed that the main inflow into a cyclone was concentrated along two lines of convergence, one ahead of the low and another trailing behind the low. The trailing convergence zone was referred to as the squall line or cold front. Areas of clouds and rainfall appeared to be focused along this convergence zone. The concept of frontal zones led to the concept of air masses. The nature of the three-dimensional structure of the cyclone was conceptualized after the development of the upper air network during the 1940s.〔University of Oklahoma (2004). (The Norwegian Cyclone Model. ) Retrieved on 2012-07-03.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Squall line」の詳細全文を読む



スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース

Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.