DOI: 10.1002/jgrd.50382
论文题名: Lightning distribution with respect to the monsoon trough position during the Indian summer monsoon season
作者: Penki R.K. ; Kamra A.K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 4780
结束页码: 4787
语种: 英语
英文关键词: lightning as a proxy for the trough position
; lightning during monsoon break period
; lightning in Indian summer monsoon
; lightning in monsoon trough
Scopus关键词: Lightning protection
; Polynomial approximation
; Rain
; Empirical orthogonal function analysis
; Indian summer monsoon
; Lightning distribution
; Lightning flash rate
; Lightning imaging sensors
; Polynomial curve fitting
; Polynomial fittings
; Tropical rainfall measuring mission satellites
; Atmospheric thermodynamics
; drought
; lightning
; monsoon
; satellite data
; satellite sensor
; summer
; TRMM
; trough
; Himalayas
英文摘要: The location and shift in the position of the maximum lightning activity with respect to the position the of monsoon trough has been investigated in the region of 20°N-32°N and 75°E-95°E during the Indian summer monsoon seasons of 2002 and 2003 from the lightning imaging sensor (LIS) data from the Tropical Rainfall Measuring Mission (TRMM) satellite. The polynomial curve fitting the maximum lightning activity followed the position of the monsoon trough in both the normal monsoon and drought years. Observations of the maximal lightning activity in the TRMM-LIS data collected during a period of 13 years, from 1998 to 2010, confirm these findings in the monsoon season. When the seasonal position of the monsoon trough moved from the plains to the submontane region of the Himalayas during a monsoon break period, the polynomial fitting of the maximum lightning activity also moved from the central Indian plains to that region. An empirical orthogonal function (EOF) analysis is applied to two different data sets of precipitation and observed high lightning flash rates over the monsoon trough region for the period of 1995-2005. The first and second components, EOF1 and EOF2, of precipitation values are out of phase with those of the flash rates. Our results imply that deep electrified convective systems during monsoon periods are responsible for the lightning activity in the monsoon trough region and that the lightning activity in this region can be used as a proxy for the location and shift of the seasonal monsoon trough. Key Points Lightning a proxy for the monsoon troughlightning Position and monsoon trough coincideMonsoon trough shifts to Himalayas in monsoon break period ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63779
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Indian Institute of Tropical Meteorology, Pashan, Pune, Maharashtra, 411008, India
Recommended Citation:
Penki R.K.,Kamra A.K.. Lightning distribution with respect to the monsoon trough position during the Indian summer monsoon season[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)