Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.6250 |
Climatology of local severe convective storms in Assam, India | |
Mahanta, Rahul1; Yamane, Yusuke2 | |
2019-09-05 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | India; Japan |
英文摘要 | In Assam, local severe convective storms (LSCS) are recognized as exceptionally powerful and destructive meteorological events resulting in both death and loss of property, as well as livelihood. A valuable aid to assessing and managing LSCS lies in a reliable database of historical severe storms. In this paper, we investigate the temporal and spatial characteristics of LSCS in the state of Assam lying in the North Eastern Province of India and provide a climatology of LSCS for the state, with respect to: distribution, storm types, frequency, seasonality, and time of occurrence. This was accomplished by developing a LSCS database through a systematic scanning of newspapers and other available sources. This historical database on LSC S dating from 1962 to 2016 was used to identify the areas where the threat and risks from these storms is maximum. Our findings show that LSCS occur throughout the state of Assam, but there are unique geographical areas where the propensity for the occurrence severe to intense local convective storm is much higher. From the monthly distribution of LSCS events, as have been found by previous researchers, the most active month is April. The monthly distributions of hail follow similar pattern as the total number of LSCS events, however, seasonality of lightning differ from other LSCS categories. The probability of LSCS is not uniform throughout the day and tend to reach their most vigorous development during the latter part of the evening and night hours. The observed seasonal pattern of LSCS day's distribution corresponds with the time of the year when convective heating of the lower atmosphere is at its highest in the region, thereby increasing instability of the atmosphere. In addition, climatological mean wind at upper level (200 hPa) show influence of subtropical westerlies and at 925 hPa indicate possible low-level moisture transport for the peak LSCS months. Therefore, high storm frequencies are to be anticipated. Although November, December and January show the lowest frequency during the entire year, it is still surprisingly high considering that convectional heating and instability of the atmosphere has decreased substantially by then. The results from this study could be applied to produce a hazard map of LSCS for the state of Assam. Such a hazard map will benefit numerous stakeholders, in particular, to direct disaster management authority in terms of interventions for LSCS risk in the state of Assam. |
英文关键词 | Assam convective available potential energy (CAPE) frequency distribution hailstorms lightning local severe convective storms (LSCS) South Asia |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000485681000001 |
WOS关键词 | LIGHTNING ACTIVITY ; THUNDERSTORM ; TORNADOES ; HAILSTORMS ; FREQUENCY ; EVENTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/186942 |
专题 | 气候变化 |
作者单位 | 1.Cotton Univ, Interdisciplinary Climate Res Ctr, Gauhati 781001, India; 2.Tokoha Univ, Fac Educ, Shizuoka, Japan |
推荐引用方式 GB/T 7714 | Mahanta, Rahul,Yamane, Yusuke. Climatology of local severe convective storms in Assam, India[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019. |
APA | Mahanta, Rahul,&Yamane, Yusuke.(2019).Climatology of local severe convective storms in Assam, India.INTERNATIONAL JOURNAL OF CLIMATOLOGY. |
MLA | Mahanta, Rahul,et al."Climatology of local severe convective storms in Assam, India".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2019). |
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