Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years
Firn core methanesulphonic acid (MSA) stratigraphy from Talos Dome (East Antarctica) was compared with anomalies of the satellite-measured sea ice extent (1973-1995) in the Ross Sea and Wilkes Land oceanic sector. In spite of the sparseness of sea ice data, the MSA maxima fit with many positive sea...
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Online Access: | http://hdl.handle.net/11590/353601 https://doi.org/10.1016/j.atmosenv.2008.11.015 |
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ftunivroma3iris:oai:iris.uniroma3.it:11590/353601 2024-02-11T09:56:39+01:00 Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years Becagli S. Castellano E. Cerri O. Curran M. Frezzotti M. Marino F. Morganti A. Proposito M. Severi M. Traversi R. Udisti R. Becagli, S. Castellano, E. Cerri, O. Curran, M. Frezzotti, M. Marino, F. Morganti, A. Proposito, M. Severi, M. Traversi, R. Udisti, R. 2009 http://hdl.handle.net/11590/353601 https://doi.org/10.1016/j.atmosenv.2008.11.015 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000263426300010 volume:43 issue:5 firstpage:1051 lastpage:1058 numberofpages:8 journal:ATMOSPHERIC ENVIRONMENT http://hdl.handle.net/11590/353601 doi:10.1016/j.atmosenv.2008.11.015 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-58249133798 Antarctica Ice core Methanesulphonic acid SAM Sea ice SOI Talos Dome info:eu-repo/semantics/article 2009 ftunivroma3iris https://doi.org/10.1016/j.atmosenv.2008.11.015 2024-01-24T17:41:56Z Firn core methanesulphonic acid (MSA) stratigraphy from Talos Dome (East Antarctica) was compared with anomalies of the satellite-measured sea ice extent (1973-1995) in the Ross Sea and Wilkes Land oceanic sector. In spite of the sparseness of sea ice data, the MSA maxima fit with many positive sea ice anomalies in the Ross Sea. This evidence suggests that marine biogenic activity enhanced by large sea ice cover is an important, but not exclusive, factor in controlling MSA concentration in snow precipitation at Talos Dome. Other than source intensity, differences in regional atmospheric transport mechanisms affect the arrival of MSA-rich aerosol at Talos Dome. To clarify the role of transport processes in bringing biogenic aerosol to Talos Dome, a spectral analysis was applied to the MSA, SOI (South Oscillation Index), and SAM (Southern Annular Mode) record. Synchronicity or phase shift between the chemical signature and atmospheric circulation modes were tested. The variations in the MSA profile have a periodicity of 6.9, 4.9, 3.5, and 2.9 years. The 6.9 and 2.9 year periodicities show a strong positive correlation and are synchronous with corresponding SOI periodicity. This variability could be related to an increase in MSA source intensity (by dimethylsulphide from phytoplanktonic activity) linked to the sea ice extent in the Ross Sea area, but also to an increased strength in transport processes. Both of these factors are correlated with La Niña events (SOI positive values). Furthermore, SAM positive values are related to an increased sea ice extent in the Ross Sea sector and show two main periodicities 3.3 and 3.8 years. These periodicities determine the MSA variability at 3.5 years. However, the effect of intensification of the polar vortex and the consequent reduction in transport process intensity, which reduce the delivery of air masses enriched in MSA from oceanic areas to Talos Dome, make the effect of the SAM on the MSA concentration at Talos Dome less active than the SOI. In this way, snow ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Ross Sea Sea ice Wilkes Land Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) East Antarctica Ross Sea Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Soi ENVELOPE(30.704,30.704,66.481,66.481) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Atmospheric Environment 43 5 1051 1058 |
institution |
Open Polar |
collection |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
topic |
Antarctica Ice core Methanesulphonic acid SAM Sea ice SOI Talos Dome |
spellingShingle |
Antarctica Ice core Methanesulphonic acid SAM Sea ice SOI Talos Dome Becagli S. Castellano E. Cerri O. Curran M. Frezzotti M. Marino F. Morganti A. Proposito M. Severi M. Traversi R. Udisti R. Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
topic_facet |
Antarctica Ice core Methanesulphonic acid SAM Sea ice SOI Talos Dome |
description |
Firn core methanesulphonic acid (MSA) stratigraphy from Talos Dome (East Antarctica) was compared with anomalies of the satellite-measured sea ice extent (1973-1995) in the Ross Sea and Wilkes Land oceanic sector. In spite of the sparseness of sea ice data, the MSA maxima fit with many positive sea ice anomalies in the Ross Sea. This evidence suggests that marine biogenic activity enhanced by large sea ice cover is an important, but not exclusive, factor in controlling MSA concentration in snow precipitation at Talos Dome. Other than source intensity, differences in regional atmospheric transport mechanisms affect the arrival of MSA-rich aerosol at Talos Dome. To clarify the role of transport processes in bringing biogenic aerosol to Talos Dome, a spectral analysis was applied to the MSA, SOI (South Oscillation Index), and SAM (Southern Annular Mode) record. Synchronicity or phase shift between the chemical signature and atmospheric circulation modes were tested. The variations in the MSA profile have a periodicity of 6.9, 4.9, 3.5, and 2.9 years. The 6.9 and 2.9 year periodicities show a strong positive correlation and are synchronous with corresponding SOI periodicity. This variability could be related to an increase in MSA source intensity (by dimethylsulphide from phytoplanktonic activity) linked to the sea ice extent in the Ross Sea area, but also to an increased strength in transport processes. Both of these factors are correlated with La Niña events (SOI positive values). Furthermore, SAM positive values are related to an increased sea ice extent in the Ross Sea sector and show two main periodicities 3.3 and 3.8 years. These periodicities determine the MSA variability at 3.5 years. However, the effect of intensification of the polar vortex and the consequent reduction in transport process intensity, which reduce the delivery of air masses enriched in MSA from oceanic areas to Talos Dome, make the effect of the SAM on the MSA concentration at Talos Dome less active than the SOI. In this way, snow ... |
author2 |
Becagli, S. Castellano, E. Cerri, O. Curran, M. Frezzotti, M. Marino, F. Morganti, A. Proposito, M. Severi, M. Traversi, R. Udisti, R. |
format |
Article in Journal/Newspaper |
author |
Becagli S. Castellano E. Cerri O. Curran M. Frezzotti M. Marino F. Morganti A. Proposito M. Severi M. Traversi R. Udisti R. |
author_facet |
Becagli S. Castellano E. Cerri O. Curran M. Frezzotti M. Marino F. Morganti A. Proposito M. Severi M. Traversi R. Udisti R. |
author_sort |
Becagli S. |
title |
Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
title_short |
Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
title_full |
Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
title_fullStr |
Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
title_full_unstemmed |
Methanesulphonic acid (MSA) stratigraphy from a Talos Dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
title_sort |
methanesulphonic acid (msa) stratigraphy from a talos dome ice core as a tool in depicting sea ice changes and southern atmospheric circulation over the previous 140 years |
publishDate |
2009 |
url |
http://hdl.handle.net/11590/353601 https://doi.org/10.1016/j.atmosenv.2008.11.015 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(30.704,30.704,66.481,66.481) ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
East Antarctica Ross Sea Wilkes Land Soi Talos Dome |
geographic_facet |
East Antarctica Ross Sea Wilkes Land Soi Talos Dome |
genre |
Antarc* Antarctica East Antarctica ice core Ross Sea Sea ice Wilkes Land |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ross Sea Sea ice Wilkes Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000263426300010 volume:43 issue:5 firstpage:1051 lastpage:1058 numberofpages:8 journal:ATMOSPHERIC ENVIRONMENT http://hdl.handle.net/11590/353601 doi:10.1016/j.atmosenv.2008.11.015 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-58249133798 |
op_doi |
https://doi.org/10.1016/j.atmosenv.2008.11.015 |
container_title |
Atmospheric Environment |
container_volume |
43 |
container_issue |
5 |
container_start_page |
1051 |
op_container_end_page |
1058 |
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1790604780643549184 |