...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Meteorology and Atmospheric Physics >Disparity in the characteristic of thunderstorms and associated lightning activities over dissimilar terrains
【24h】

Disparity in the characteristic of thunderstorms and associated lightning activities over dissimilar terrains

机译：不同地形上雷暴和相关闪电活动特征的差异

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thunderstorms and associated lightning flash activities are studied over two different locations in India with different terrain features. Lightning imaging sensor (LIS) data from 1998 to 2008 are analyzed during the pre-monsoon months (March, April and May). The eastern sector is designated as Sector A that represents a 2A degrees A xA 2A degrees square area enclosing Kolkata (22.65A degrees N, 88.45A degrees E) at the centre and covering Gangetic West Bengal, parts of Bihar and Orissa whereas the north-eastern sector designated as Sector B that also represents a 2A degrees A xA 2A degrees square area encircling Guwahati (26.10A degrees N, 91.58A degrees E) at the centre and covering Assam and foot hills of Himalaya of India. The stations Kolkata and Guwahati are selected for the present study from Sector A and Sector B, respectively, as these are the only stations over the selected areas having Radiosonde observatory. The result of the present study reveals that the characteristics of thunderstorms over the two locations are remarkably different. Lightning frequency is observed to be higher in Sector B than Sector A. The result further reveals that though the lightning frequency is less in Sector A, but the associated radiance is higher in Sector A than Sector B. It is also observed that the radiance increases linearly with convective available potential energy (CAPE) and their high correlation reveals that the lightning intensity can be estimated through the CAPE values. The sensitivity of lightning activity to CAPE is higher at the elevated station Guwahati (elevation 54 m) than Kolkata (elevation 6 m). Moderate resolution imaging spectrometer (MODIS) data products are used to obtain aerosol optical depth and cloud top temperature and employed to find their responses on lightning radiance.
机译：在印度具有不同地形特征的两个不同地点研究了雷暴和相关的闪电活动。在季风前几个月（3月，4月和5月）分析了1998年至2008年的闪电成像传感器（LIS）数据。东部地区称为A区，代表2A度xA 2A度的正方形区域，该区域的中心是加尔各答（22.65A度，88.45A度），中心覆盖恒河西孟加拉邦，比哈尔和奥里萨邦的部分地区，而北部则称为B区域的东部区域，也代表2A度xA 2A度的正方形区域，其中心围绕着Guwahati（北纬26.10A度，东经91.58A度），覆盖印度喜马拉雅山的阿萨姆邦和山麓。本研究分别从A区和B区中选择了加尔各答和古瓦哈提两个台站，因为它们是选定区域内仅有无线电探空仪观测站的唯一台站。本研究的结果表明，两个地区的雷暴特征明显不同。观察到B区的闪电频率高于A区。该结果进一步揭示，尽管A区的闪电频率较小，但A区的相关辐射比B区更高。还观察到辐射度增加与对流可用势能（CAPE）线性相关，并且它们的高相关性表明可以通过CAPE值估算雷电强度。在高架站古瓦哈提（海拔54 m），闪电活动对CAPE的敏感性高于加尔各答（海拔6 m）。中分辨率成像光谱仪（MODIS）数据产品用于获得气溶胶光学深度和云顶温度，并用于查找其对雷电辐射的响应。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号