Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model
Abstract The effect of polar sea ice melt on low latitude climate is little known. To understand the response of the Indian summer monsoon (ISM) synoptic activity to the sea ice melt, we have run a suite of coupled and uncoupled climate model simulations. In one set of simulations, the albedo of sea...
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ftdoajarticles:oai:doaj.org/article:f023b7cff4374b448d87c0c31250a1f7 2023-05-15T13:11:22+02:00 Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model Varunesh Chandra S. Sandeep E. Suhas Aneesh C. Subramanian 2022-09-01T00:00:00Z https://doi.org/10.1029/2021EA002185 https://doaj.org/article/f023b7cff4374b448d87c0c31250a1f7 EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2021EA002185 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2021EA002185 https://doaj.org/article/f023b7cff4374b448d87c0c31250a1f7 Earth and Space Science, Vol 9, Iss 9, Pp n/a-n/a (2022) monsoon polar sea ice low‐pressure systems Astronomy QB1-991 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.1029/2021EA002185 2022-12-31T00:09:57Z Abstract The effect of polar sea ice melt on low latitude climate is little known. To understand the response of the Indian summer monsoon (ISM) synoptic activity to the sea ice melt, we have run a suite of coupled and uncoupled climate model simulations. In one set of simulations, the albedo of sea ice is reduced so that it would melt due to increased absorption of solar radiation. The coupled model simulation with a reduced sea ice albedo resulted in an almost complete melting of the sea ice in summer in both hemispheres. A high‐resolution (50 km) atmospheric general circulation model (AGCM) is forced with the climatological annual cycles of sea surface temperature (SST) and sea ice concentrations (SIC) from the coupled model outputs to better resolve synoptic scale variability. In the high‐resolution AGCM simulations forced with SST and SIC from the sea ice melt experiments, the ISM circulation weakened substantially, and the monsoon low‐pressure systems (LPS) activity experienced an overall decline of 23%, with a widespread weakening in the south and a moderate strengthening over the north, in response to a decline of 78% (24%) in SIC over the Arctic (Antarctic) in the June–September season. The changes in the LPS activity in response to polar sea ice melt are found to be mostly driven by the changes in low‐level absolute vorticity and vertical shear over the Bay of Bengal. Article in Journal/Newspaper albedo Antarc* Antarctic Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Arctic Indian Earth and Space Science 9 9 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
monsoon polar sea ice low‐pressure systems Astronomy QB1-991 Geology QE1-996.5 |
spellingShingle |
monsoon polar sea ice low‐pressure systems Astronomy QB1-991 Geology QE1-996.5 Varunesh Chandra S. Sandeep E. Suhas Aneesh C. Subramanian Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model |
topic_facet |
monsoon polar sea ice low‐pressure systems Astronomy QB1-991 Geology QE1-996.5 |
description |
Abstract The effect of polar sea ice melt on low latitude climate is little known. To understand the response of the Indian summer monsoon (ISM) synoptic activity to the sea ice melt, we have run a suite of coupled and uncoupled climate model simulations. In one set of simulations, the albedo of sea ice is reduced so that it would melt due to increased absorption of solar radiation. The coupled model simulation with a reduced sea ice albedo resulted in an almost complete melting of the sea ice in summer in both hemispheres. A high‐resolution (50 km) atmospheric general circulation model (AGCM) is forced with the climatological annual cycles of sea surface temperature (SST) and sea ice concentrations (SIC) from the coupled model outputs to better resolve synoptic scale variability. In the high‐resolution AGCM simulations forced with SST and SIC from the sea ice melt experiments, the ISM circulation weakened substantially, and the monsoon low‐pressure systems (LPS) activity experienced an overall decline of 23%, with a widespread weakening in the south and a moderate strengthening over the north, in response to a decline of 78% (24%) in SIC over the Arctic (Antarctic) in the June–September season. The changes in the LPS activity in response to polar sea ice melt are found to be mostly driven by the changes in low‐level absolute vorticity and vertical shear over the Bay of Bengal. |
format |
Article in Journal/Newspaper |
author |
Varunesh Chandra S. Sandeep E. Suhas Aneesh C. Subramanian |
author_facet |
Varunesh Chandra S. Sandeep E. Suhas Aneesh C. Subramanian |
author_sort |
Varunesh Chandra |
title |
Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model |
title_short |
Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model |
title_full |
Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model |
title_fullStr |
Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model |
title_full_unstemmed |
Weakening of Indian Summer Monsoon Synoptic Activity in Response to Polar Sea Ice Melt Induced by Albedo Reduction in a Climate Model |
title_sort |
weakening of indian summer monsoon synoptic activity in response to polar sea ice melt induced by albedo reduction in a climate model |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021EA002185 https://doaj.org/article/f023b7cff4374b448d87c0c31250a1f7 |
geographic |
Antarctic Arctic Indian |
geographic_facet |
Antarctic Arctic Indian |
genre |
albedo Antarc* Antarctic Arctic Sea ice |
genre_facet |
albedo Antarc* Antarctic Arctic Sea ice |
op_source |
Earth and Space Science, Vol 9, Iss 9, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1029/2021EA002185 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2021EA002185 https://doaj.org/article/f023b7cff4374b448d87c0c31250a1f7 |
op_doi |
https://doi.org/10.1029/2021EA002185 |
container_title |
Earth and Space Science |
container_volume |
9 |
container_issue |
9 |
_version_ |
1766247105593081856 |