Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020
Abstract The transitions of short-term trends of Indian Summer Monsoon daily precipitation extremes remain poorly understood. Here, we show a short-term declination of temporal frequency of monsoonal precipitation extremes over Central India for the last 15 years starting from 2005 to 2020 while the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-08-01
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| Series: | npj Climate and Atmospheric Science |
| Online Access: | https://doi.org/10.1038/s41612-023-00450-y |
| _version_ | 1797453437330259968 |
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| author | C. Bajrang Raju Attada B. N. Goswami |
| author_facet | C. Bajrang Raju Attada B. N. Goswami |
| author_sort | C. Bajrang |
| collection | DOAJ |
| description | Abstract The transitions of short-term trends of Indian Summer Monsoon daily precipitation extremes remain poorly understood. Here, we show a short-term declination of temporal frequency of monsoonal precipitation extremes over Central India for the last 15 years starting from 2005 to 2020 while the low and moderate events show increasing trends. The possible dynamical and thermodynamical factors for the observed decline in precipitation extremes include depletion in moisture transport to Central India via cross-equatorial flow and the low-level Somali jet, caused by reduced evaporation from the regional moisture sources. In addition, the vertical gradient of the moist static energy exhibits favorable conditions for increased lower atmospheric stability, supporting the declining trends. Lastly, the Atlantic Zonal Mode seems to be a potential large-scale climate driver for the less frequent central Indian extreme rainfall events during 2005–2020. |
| first_indexed | 2024-03-09T15:22:49Z |
| format | Article |
| id | doaj.art-d376a7ec938c4d0fa84fa2948db3c0f0 |
| institution | Directory Open Access Journal |
| issn | 2397-3722 |
| language | English |
| last_indexed | 2024-03-09T15:22:49Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Climate and Atmospheric Science |
| spelling | doaj.art-d376a7ec938c4d0fa84fa2948db3c0f02023-11-26T12:45:13ZengNature Portfolionpj Climate and Atmospheric Science2397-37222023-08-01611910.1038/s41612-023-00450-yPossible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020C. Bajrang0Raju Attada1B. N. Goswami2Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research MohaliDepartment of Earth and Environmental Sciences, Indian Institute of Science Education and Research MohaliDepartment of Physics, Cotton UniversityAbstract The transitions of short-term trends of Indian Summer Monsoon daily precipitation extremes remain poorly understood. Here, we show a short-term declination of temporal frequency of monsoonal precipitation extremes over Central India for the last 15 years starting from 2005 to 2020 while the low and moderate events show increasing trends. The possible dynamical and thermodynamical factors for the observed decline in precipitation extremes include depletion in moisture transport to Central India via cross-equatorial flow and the low-level Somali jet, caused by reduced evaporation from the regional moisture sources. In addition, the vertical gradient of the moist static energy exhibits favorable conditions for increased lower atmospheric stability, supporting the declining trends. Lastly, the Atlantic Zonal Mode seems to be a potential large-scale climate driver for the less frequent central Indian extreme rainfall events during 2005–2020.https://doi.org/10.1038/s41612-023-00450-y |
| spellingShingle | C. Bajrang Raju Attada B. N. Goswami Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020 npj Climate and Atmospheric Science |
| title | Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020 |
| title_full | Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020 |
| title_fullStr | Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020 |
| title_full_unstemmed | Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020 |
| title_short | Possible factors for the recent changes in frequency of central Indian Summer Monsoon precipitation extremes during 2005–2020 |
| title_sort | possible factors for the recent changes in frequency of central indian summer monsoon precipitation extremes during 2005 2020 |
| url | https://doi.org/10.1038/s41612-023-00450-y |
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