Large‐scale connection to deadly Indian heatwaves
Abstract In the present study, we analyse large‐scale connections to deadly heatwaves in India in spring. Deadly Indian heatwaves occur in the spring months of April and May, and are increasing in recent years. These events are associated with the amplification of planetary Rossby waves. This amplif...
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crwiley:10.1002/qj.3985 2024-06-23T07:49:34+00:00 Large‐scale connection to deadly Indian heatwaves Rao, V. Brahmananda Rao, K. Koteswara Mahendranath, B. Lakshmi Kumar, T. V. Govardhan, D. 2021 http://dx.doi.org/10.1002/qj.3985 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3985 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3985 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3985 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 147, issue 735, page 1419-1430 ISSN 0035-9009 1477-870X journal-article 2021 crwiley https://doi.org/10.1002/qj.3985 2024-06-13T04:21:14Z Abstract In the present study, we analyse large‐scale connections to deadly heatwaves in India in spring. Deadly Indian heatwaves occur in the spring months of April and May, and are increasing in recent years. These events are associated with the amplification of planetary Rossby waves. This amplification is called quasi‐resonant amplification (QRA). An increase of amplitude or resonance occurs when stationary and moving waves coincide in their size. Previous studies stressed QRA's role in summer because persistent extreme weather events such as the 2003 European heatwave, the 2010 Pakistan flood, Russian heatwave, the 2011 Texas and Oklahoma heat waves, and drought occurred in summer. QRA seems to be related to the amplification of Arctic warming in winter and summer, but observations show that Arctic warming occurs in spring also. The novel aspect of our study is that we found strong evidence for QRA in the boreal spring, the season of Indian heatwaves. Amplified Arctic warming or Arctic amplification thought to be responsible for QRA occurs in spring also. Our results confirm that maximum surface temperatures in spring over India show predictability with high statistical significance, about 4 days ahead. Maximum surface temperatures can be used to predict heatwaves, as shown earlier by some authors. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Indian Quarterly Journal of the Royal Meteorological Society 147 735 1419 1430 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In the present study, we analyse large‐scale connections to deadly heatwaves in India in spring. Deadly Indian heatwaves occur in the spring months of April and May, and are increasing in recent years. These events are associated with the amplification of planetary Rossby waves. This amplification is called quasi‐resonant amplification (QRA). An increase of amplitude or resonance occurs when stationary and moving waves coincide in their size. Previous studies stressed QRA's role in summer because persistent extreme weather events such as the 2003 European heatwave, the 2010 Pakistan flood, Russian heatwave, the 2011 Texas and Oklahoma heat waves, and drought occurred in summer. QRA seems to be related to the amplification of Arctic warming in winter and summer, but observations show that Arctic warming occurs in spring also. The novel aspect of our study is that we found strong evidence for QRA in the boreal spring, the season of Indian heatwaves. Amplified Arctic warming or Arctic amplification thought to be responsible for QRA occurs in spring also. Our results confirm that maximum surface temperatures in spring over India show predictability with high statistical significance, about 4 days ahead. Maximum surface temperatures can be used to predict heatwaves, as shown earlier by some authors. |
format |
Article in Journal/Newspaper |
author |
Rao, V. Brahmananda Rao, K. Koteswara Mahendranath, B. Lakshmi Kumar, T. V. Govardhan, D. |
spellingShingle |
Rao, V. Brahmananda Rao, K. Koteswara Mahendranath, B. Lakshmi Kumar, T. V. Govardhan, D. Large‐scale connection to deadly Indian heatwaves |
author_facet |
Rao, V. Brahmananda Rao, K. Koteswara Mahendranath, B. Lakshmi Kumar, T. V. Govardhan, D. |
author_sort |
Rao, V. Brahmananda |
title |
Large‐scale connection to deadly Indian heatwaves |
title_short |
Large‐scale connection to deadly Indian heatwaves |
title_full |
Large‐scale connection to deadly Indian heatwaves |
title_fullStr |
Large‐scale connection to deadly Indian heatwaves |
title_full_unstemmed |
Large‐scale connection to deadly Indian heatwaves |
title_sort |
large‐scale connection to deadly indian heatwaves |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/qj.3985 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3985 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3985 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3985 |
geographic |
Arctic Indian |
geographic_facet |
Arctic Indian |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 147, issue 735, page 1419-1430 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.3985 |
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Quarterly Journal of the Royal Meteorological Society |
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147 |
container_issue |
735 |
container_start_page |
1419 |
op_container_end_page |
1430 |
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1802640048613490688 |