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首页> 外文期刊>Atmospheric science letters >Post‐summer heavy rainfall events in Southeast Brazil associated with South Atlantic Convergence Zone
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Post‐summer heavy rainfall events in Southeast Brazil associated with South Atlantic Convergence Zone

机译：巴西东南部与南大西洋收敛带有关的夏季后大雨事件

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Heavy rainfall events (HREs) in the post‐summer month of March in Southeast Brazil cause disasters such as floods, mudslides and landslides, mainly because the soil becomes saturated by February. Forty‐five years of rainfall data show that heavy rainfall frequency increases again in the month of March. The composite anomaly fields of the atmospheric circulation during and before HREs associated with the formation of South Atlantic Convergence Zone show some special characteristics that may be used as a guide for early warning. The convergence of moisture flux in the troposphere over the region grows 40% during the 48 h before the HRE in March. Copyright © 2010 Royal Meteorological Society.
机译：大雨事件＆lpar; HREs＆rpar;在巴西东南部3月后的夏季，造成洪水，泥石流和山体滑坡等灾害的主要原因是2月土壤变得饱和。四十五年的降雨数据表明，三月份的强降雨频率再次增加。在与南大西洋收敛带形成有关的高空雷暴期间和之前，大气环流的复合异常场表现出一些特殊的特征，可以用作预警的指南。该区域对流层中水汽通量的收敛速度增长了40％;在三月份HRE之前的48小时内。版权所有©2010皇家气象学会。

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