Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2021.105670 |
Tropical cyclogenesis identification using eddy detection technique for the Bay of Bengal Basin | |
Jiya Albert, Bishnupriya Sahoo, Prasad K. Bhaskaran | |
2021-05-08 | |
发表期刊 | Atmospheric Research |
出版年 | 2021 |
英文摘要 | The study deals with formative stages and lead detection time of tropical cyclogenesis using Okubo-Weiss Parameter, a proven robust eddy detection technique used for tropical cyclones that developed over the north Indian Ocean basin. Specifically, it aims to identify the initial traces of upper atmospheric genesis and understand the spatio-temporal evolution of pre-cyclonic eddy vortices in the atmospheric column using high-resolution WRF model outputs simulated for different cyclones. A coarser resolution grid of 27 km was used for identification purpose and a finer resolution of 9 km used to evaluate the characteristics of eddy vortices. Case studies were performed with four post-monsoon severe cyclones viz.; Phailin(2013), Vardah(2013), Gaja(2018), Madi(2013) and two pre-monsoon cyclones Mora(2017) and Aila(2009) that developed over this region. Study reveals a good skill in genesis prediction with a minimum of four days (~ 90 h) lead time in all cases irrespective of pre- and post-monsoon seasons. Factors that favor cyclogenesis during pre-monsoon season (except relative humidity) contribute to early detection of pre-cyclonic vortices in the atmosphere. Initiation mechanism of tropical cyclogenesis occurs at upper atmospheric levels and also detected at higher lead time for pre-monsoon cases unlike the post-monsoon cases. A lower relative vorticity at 850 hPa in pre-monsoon seasons is a major factor that initiates pre-cyclonic vortices at relatively higher levels compared to post-monsoon cyclones. Study also investigated the behavior of eddies in the atmospheric column for a non-developing case and compared these findings against developing cases. The study signifies that this technique is quite promising and has potential for early detection of tropical cyclogenesis in the atmospheric column prior to satellite detection over ocean surface. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/325800 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Jiya Albert, Bishnupriya Sahoo, Prasad K. Bhaskaran. Tropical cyclogenesis identification using eddy detection technique for the Bay of Bengal Basin[J]. Atmospheric Research,2021. |
APA | Jiya Albert, Bishnupriya Sahoo, Prasad K. Bhaskaran.(2021).Tropical cyclogenesis identification using eddy detection technique for the Bay of Bengal Basin.Atmospheric Research. |
MLA | Jiya Albert, Bishnupriya Sahoo, Prasad K. Bhaskaran."Tropical cyclogenesis identification using eddy detection technique for the Bay of Bengal Basin".Atmospheric Research (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论