{News} 080808 西日本の高温・少雨、インド洋の海水温上昇が原因　気象庁

西日本の高温・少雨、インド洋の海水温上昇が原因　気象庁


　7月の西日本の記録的な高温と少雨の原因について気象庁は8日、「インド洋の海水温上昇が原因」との見解を示した。地球温暖化も原因の一つという。今後2週間は西日本で気温が高い日が続くといい、四国の早明浦ダムなどで深刻な水不足が懸念されるほか、局地的豪雨が今後も続く可能性があるとして注意を呼びかけた。
　7月の西日本は高気圧に覆われて統計を始めた1946年以来、3番目の高温を記録。梅雨前線の活動が弱く降水量も過去最少だった。インド洋の海面水温が平年より高く強い上昇気流が発生。これにより日本に吹き込む偏西風が弱められたとみられ、西日本に高気圧が張り出した。
　太平洋西部で海面水温が高かったことも、西日本上空の高気圧を強める一因となったという。(08日　23:20)

Source: http://www.nikkei.co.jp/news/shakai/20080809AT1G0802908082008.html

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