Connection of quasi-resonant amplification to the delay in atmospheric residence times over India

Lakshmi Kumar, T. V. and Durga, G. Purna and Koteswara Rao, Kundeti and Barbosa, Humberto and Kulkarni, Ashwini and Patwardhan, Savita and Mall, R. K. and Rao, V. Brahmananda (2021) Connection of quasi-resonant amplification to the delay in atmospheric residence times over India. Frontiers in Earth Science, 9. ISSN 2296-6463

Preview

Text - Published Version Download (3MB) | Preview

Abstract

Mean monthly Atmospheric Residence Times (ART), deduced from the global climate models of Coupled Model Intercomparison Project 5 (CMIP5) under RCP4.5 and RCP8.5 emission scenarios over Indian landmass, show a perceptible increase by the end of the 21st century. India, being a tropical country, faces prolonged ART, particularly during the June month of Southwest monsoon season (June to September) which will be an indicative measure of the increased frequency of extreme weather events. Here we show a possible connection of quasi-resonant amplification (QRA) to the recent (August 2018) Kerala heavy rains that resulted in severe floods and claimed more than 400 mortalities. Remarkable delay in residence times over India during June is shown to have an association with QRA evidenced by the higher magnitudes of amplitudes at the wavenumbers six and seven from the 19 global climate models of CMIP5 under the RCP4.5 and RCP8.5 scenarios.

Item Type:	Article
Authors:	Lakshmi Kumar, T. V. and Durga, G. Purna and Koteswara Rao, Kundeti and Barbosa, Humberto and Kulkarni, Ashwini and Patwardhan, Savita and Mall, R. K. and Rao, V. Brahmananda
Document Language:	Language English
Subjects:	Social sciences > Social problems & services > Other social problems and services > Disasters > Specific kinds of disasters > Floods Natural Sciences > Earth sciences Natural Sciences > Earth sciences > Geology, hydrology, meteorology > Climatology and weather
Divisions:	Azim Premji University - Bengaluru > Research Centre > Centre for Climate Change and Sustainability
Full Text Status:	Public
URI:	http://publications.azimpremjiuniversity.edu.in/id/eprint/7164
Publisher URL:	https://doi.org/10.3389/feart.2021.615325

Actions (login required)

View Item