A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection
Significant changes in the Arctic climate, particularly a rapid decline of September Arctic sea ice has occurred over the past few decades. Though the exact reason for such drastic changes is still unknown, studies suggest anthropogenic drivers, natural variability of the climate system, and a combi...
Published in: | Atmosphere |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3390/atmos13040566 |
id |
ftmdpi:oai:mdpi.com:/2073-4433/13/4/566/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2073-4433/13/4/566/ 2023-08-20T04:03:27+02:00 A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection Suchithra Sundaram David M. Holland agris 2022-03-31 application/pdf https://doi.org/10.3390/atmos13040566 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/atmos13040566 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 13; Issue 4; Pages: 566 polar climate variability Arctic sea ice teleconnections Indian monsoon North Atlantic Oscillation Beaufort Sea High Text 2022 ftmdpi https://doi.org/10.3390/atmos13040566 2023-08-01T04:37:59Z Significant changes in the Arctic climate, particularly a rapid decline of September Arctic sea ice has occurred over the past few decades. Though the exact reason for such drastic changes is still unknown, studies suggest anthropogenic drivers, natural variability of the climate system, and a combination of both as reasons. The present study focus on the influence of one of the natural variabilities of the climate system, the teleconnections associated with the Indian Summer Monsoon (ISM), and its relationship to September Arctic sea ice. Using 50 years (1951–2000) of National Center for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR) NCEP/NCAR reanalysis data, APHRODITE precipitation data, Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, V2, and HadISST sea-ice concentration data, it is shown that during many strong (weak) ISM years, the Arctic sea ice increased (decreased) predominantly over the Chukchi and Beaufort Seas. The ISM plays a significant role in causing a positive (negative) North Atlantic Oscillation (NAO) during strong (weak) ISM years through the monsoon-desert mechanism associated with monsoonal heating. Simultaneously, the NAO during a strong (weak) ISM causes weakening (strengthening) of the Beaufort Sea High (BSH). The strength of the BSH modulates the Arctic atmospheric circulation, advecting cold air and the direction of the transpolar drift stream, both leading to the generation of more (less) sea ice over the Chukchi-Beaufort Sea region during strong (weak) ISM years. The study illustrates a new atmospheric teleconnection between the tropics and the Arctic. Text Arctic Beaufort Sea Chukchi North Atlantic North Atlantic oscillation Sea ice MDPI Open Access Publishing Arctic Indian Aphrodite ENVELOPE(-64.533,-64.533,-68.900,-68.900) Atmosphere 13 4 566 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
polar climate variability Arctic sea ice teleconnections Indian monsoon North Atlantic Oscillation Beaufort Sea High |
spellingShingle |
polar climate variability Arctic sea ice teleconnections Indian monsoon North Atlantic Oscillation Beaufort Sea High Suchithra Sundaram David M. Holland A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection |
topic_facet |
polar climate variability Arctic sea ice teleconnections Indian monsoon North Atlantic Oscillation Beaufort Sea High |
description |
Significant changes in the Arctic climate, particularly a rapid decline of September Arctic sea ice has occurred over the past few decades. Though the exact reason for such drastic changes is still unknown, studies suggest anthropogenic drivers, natural variability of the climate system, and a combination of both as reasons. The present study focus on the influence of one of the natural variabilities of the climate system, the teleconnections associated with the Indian Summer Monsoon (ISM), and its relationship to September Arctic sea ice. Using 50 years (1951–2000) of National Center for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR) NCEP/NCAR reanalysis data, APHRODITE precipitation data, Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, V2, and HadISST sea-ice concentration data, it is shown that during many strong (weak) ISM years, the Arctic sea ice increased (decreased) predominantly over the Chukchi and Beaufort Seas. The ISM plays a significant role in causing a positive (negative) North Atlantic Oscillation (NAO) during strong (weak) ISM years through the monsoon-desert mechanism associated with monsoonal heating. Simultaneously, the NAO during a strong (weak) ISM causes weakening (strengthening) of the Beaufort Sea High (BSH). The strength of the BSH modulates the Arctic atmospheric circulation, advecting cold air and the direction of the transpolar drift stream, both leading to the generation of more (less) sea ice over the Chukchi-Beaufort Sea region during strong (weak) ISM years. The study illustrates a new atmospheric teleconnection between the tropics and the Arctic. |
format |
Text |
author |
Suchithra Sundaram David M. Holland |
author_facet |
Suchithra Sundaram David M. Holland |
author_sort |
Suchithra Sundaram |
title |
A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection |
title_short |
A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection |
title_full |
A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection |
title_fullStr |
A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection |
title_full_unstemmed |
A Physical Mechanism for the Indian Summer Monsoon—Arctic Sea-Ice Teleconnection |
title_sort |
physical mechanism for the indian summer monsoon—arctic sea-ice teleconnection |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/atmos13040566 |
op_coverage |
agris |
long_lat |
ENVELOPE(-64.533,-64.533,-68.900,-68.900) |
geographic |
Arctic Indian Aphrodite |
geographic_facet |
Arctic Indian Aphrodite |
genre |
Arctic Beaufort Sea Chukchi North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Beaufort Sea Chukchi North Atlantic North Atlantic oscillation Sea ice |
op_source |
Atmosphere; Volume 13; Issue 4; Pages: 566 |
op_relation |
https://dx.doi.org/10.3390/atmos13040566 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos13040566 |
container_title |
Atmosphere |
container_volume |
13 |
container_issue |
4 |
container_start_page |
566 |
_version_ |
1774713816237473792 |