Study of the role of transient atmospheric disturbances in the climate system over the tropics

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400460
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Hokkaido University
• Principal Investigator: Horinouchi Takeshi 北海道大学, 地球環境科学研究科(研究院), 准教授 (50314266)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 大気波動 / 熱帯気象 / 総観気象 / 気候システム / 降水

Outline of Final Research Achievements

This study was conducted to elucidate the roles of transient atmospheric disturbances in the climate system over the tropics to subtropics. Relationship among convectively coupled mixed Rossby-gravity waves, seasonal precipitation and sea surface temperature was elucidated. It was shown that summertime synoptic-scale Rossby waves that propagate along subtropical jet modulate water-vapor transport and induce vertical motion to form precipitation belts that co-vary with the jet. The findings will be useful to evaluate climate prediction.

Free Research Field

気象学，地球流体力学