出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/04/07 20:03 UTC 版)
The cold drop (Spanish: gota fría, Valencian: gota freda) is a meteorological phenomenon that appears when a front of very cold polar air, a jet stream, advances slowly over Western Europe, at high altitude (normally 5–9 km or 3–5.5 mi).