Seasonal transition of predominant precipitation type and lightning activity over tropical monsoon areas derived from TRMM observations
Seasonal transition of predominant precipitation type and lightning activity over tropical monsoon areas derived from TRMM observations
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DOI：
10.1029/2005gl022986
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发表时间：
2005-07
影响因子：
5.2
通讯作者：
Yasu-masa Kodama;Akihiro Ohta;M. Katsumata;S. Mori;S. Satoh;H. Ueda
中科院分区：
文献类型：
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作者：
Yasu-masa Kodama;Akihiro Ohta;M. Katsumata;S. Mori;S. Satoh;H. Ueda
1998年至2000年三年间TRMM-PR和LIS观测的月度统计数据描述了亚洲和南美夏季风前季风和季风期降雨和闪电活动的大范围特征。季风爆发前一两个月的强降雨（约5-10毫米/天）主要覆盖陆地。季风前的降雨是强对流的，其特点是闪电活跃、对流雨比例高、回波顶高。相反，爆发后，海洋和陆地也出现强降雨，但陆地对流强度减弱。在夏季季风的后半段，亚马逊河流域和孟加拉国的闪电活动受到抑制。
Monthly statistics from TRMM‐PR and LIS observations for the three years 1998 to 2000 describe large‐scale features in rainfall and lightning activity during pre‐monsoon and monsoon periods of the Asian and South American summer monsoons. Heavy (∼5–10 mm/day) pre‐monsoon rainfall in the one or two months before onset was widespread mainly over land. Pre‐monsoon rainfall was highly convective and characterized by active lightning, a high ratio of convective rain, and high echo tops. After onset, in contrast, intense rains also occurred over the ocean and land, however, convective intensity over land was diminished. Lightning activity was suppressed over the Amazon basin and Bangladesh during the latter half of the summer monsoon.