Extreme Rainfall in Katulampa Associated with the Atmospheric Circulation
Extreme Rainfall in Katulampa Associated with the Atmospheric Circulation
复制标题
卡图兰帕的极端降雨与大气环流有关
DOI：
10.1016/j.proenv.2016.03.066
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
R. Hidayat
中科院分区：
文献类型：
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作者：
G. Wicaksono;R. Hidayat
极端降雨将增加河流流量，它可以由区域和全球大气环流引发。本研究的目的是分析Katulampa的降雨强度及其与大气环流的关系。我们发现，Katulampa的极端降雨阈值是67毫米，在12月-1月-2月（DJF），这是使用95%百分位数的方法确定的。1981 - 2013年极端降水事件发生天数为86天。结果表明，卡图兰帕降水强度的增加主要受MJO振荡和冷涌的影响。MJO和冷涌改变了水汽的输送，并触发了爪哇岛上空对流云的形成。MJO的第2、3、4和5阶段对Katulampa降雨强度的增加影响最大，其特征是向外长波辐射（190 - 210 W/m2）。同时，冷涌事件对Katulampa降水强度的增加有1-2天的时滞。
Extreme rainfall will increase the river flow and it can be triggered by regional and global atmospheric circulation. Objective of this study is to analyze the intensity of rainfall in Katulampa and its associated with the atmospheric circulation. We found that the extreme rainfall threshold in Katulampa is 67 mm in December-January-February (DJF) which is determined using 95% percentile method. The number of extreme rainfall events is 86 days during 1981 to 2013. The results showed that increasing of rainfall intensity in Katulampa is influenced by the Madden-Julian Oscillation (MJO) and cold surge. MJO and cold surge modify the transport of water vapor and triggering the formation of convective clouds over the Java Island. Phase 2,3,4 and 5 of MJO have the highest impact on increasing rainfall intensity in Katulampa which is characterized by Outgoing Longwave Radiation (190 - 210 W/m2). Meanwhile, the cold surge event has time lag about 1-2 days to increase the rainfall intensity in Katulampa.