Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover
Spatial and temporal variability of a sea‑salt aerosol (Na+) concentration was investigated in snow‑firn cores and snow pits taken at four sites of the Indian Ocean sector of the East Antarctica (along a profile between stations Progress and Vostok: PV‑10, NVFL‑1, SW‑42, and the Vostok point). In lo...
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ftdoajarticles:oai:doaj.org/article:4abcdc92e6db4f39a8427cf442823da5 2023-05-15T14:13:32+02:00 Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover E. Yu. Osipov O. P. Osipova L. P. Golobokova T. V. Khodzher 2017-05-01T00:00:00Z https://doi.org/10.15356/2076-6734-2017-2-170-184 https://doaj.org/article/4abcdc92e6db4f39a8427cf442823da5 RU rus Nauka https://ice-snow.igras.ru/jour/article/view/376 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2017-2-170-184 https://doaj.org/article/4abcdc92e6db4f39a8427cf442823da5 Лëд и снег, Vol 57, Iss 2, Pp 170-184 (2017) антарктида атмосферная циркуляция натрий реконструкция климата снежно‑фирновые керны Science Q article 2017 ftdoajarticles https://doi.org/10.15356/2076-6734-2017-2-170-184 2023-03-19T01:40:13Z Spatial and temporal variability of a sea‑salt aerosol (Na+) concentration was investigated in snow‑firn cores and snow pits taken at four sites of the Indian Ocean sector of the East Antarctica (along a profile between stations Progress and Vostok: PV‑10, NVFL‑1, SW‑42, and the Vostok point). In long annually resolved Na+ records, we had revealed the following periodicities: 17 to 95‑year (Vostok) and 29 to 52‑year (NVFL‑1), while the shorter records are characterized by 8‑year periodicity. The Na+ concentrations decrease as the snow accu‑ mulation increases (especially, at the Vostok station), and this is evidence for a presence of «dilution effect» in the sites with the great part of «dry precipitation». The closest relationship was revealed between changes in flows of Na+ at points SW‑42, and PV‑10. Variability of the Na+ fluxes had been linked to the circulation indices (AAO, PDO, SOI, MEI, SPO) and the sea level pressure in the Southern Hemisphere, as well as to occurrence of Elementary Circulation Mechanisms (ECM). The revealed irregularity of the Na+ precipitation over the area under investigation is caused by different atmospheric circulation patterns as well as by influ‑ ence of basic Action Centers of the Atmosphere (ACA) in the Southern Hemisphere. The closest relationship is found to take place with South Pacific ACA (Vostok, 1976–2009) and with the South Indian ACA (SW‑42 and PV‑10). A presence of distant atmospheric relations (including one with El Nino) had been revealed for the inland areas. Changes in features of the atmospheric circulation in the South Indian Ocean over the last 200‑year period have been reconstructed on the basis of summarized Na+ records from the Vostok station area. Distinctive feature of the atmospheric circulation is the 40‑year periodicity with its increasing intensity during the following periods: 1805–1820, 1830–1860, 1890–1900, 1940–1950, and 1980–2000. In addition, we had revealed that changes in the atmospheric circulation in the Indian Ocean (Southern Hemisphere) ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica Антарктида Directory of Open Access Journals: DOAJ Articles East Antarctica Pacific Indian Soi ENVELOPE(30.704,30.704,66.481,66.481) Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) Ice and Snow 57 2 170 184 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
антарктида атмосферная циркуляция натрий реконструкция климата снежно‑фирновые керны Science Q |
spellingShingle |
антарктида атмосферная циркуляция натрий реконструкция климата снежно‑фирновые керны Science Q E. Yu. Osipov O. P. Osipova L. P. Golobokova T. V. Khodzher Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover |
topic_facet |
антарктида атмосферная циркуляция натрий реконструкция климата снежно‑фирновые керны Science Q |
description |
Spatial and temporal variability of a sea‑salt aerosol (Na+) concentration was investigated in snow‑firn cores and snow pits taken at four sites of the Indian Ocean sector of the East Antarctica (along a profile between stations Progress and Vostok: PV‑10, NVFL‑1, SW‑42, and the Vostok point). In long annually resolved Na+ records, we had revealed the following periodicities: 17 to 95‑year (Vostok) and 29 to 52‑year (NVFL‑1), while the shorter records are characterized by 8‑year periodicity. The Na+ concentrations decrease as the snow accu‑ mulation increases (especially, at the Vostok station), and this is evidence for a presence of «dilution effect» in the sites with the great part of «dry precipitation». The closest relationship was revealed between changes in flows of Na+ at points SW‑42, and PV‑10. Variability of the Na+ fluxes had been linked to the circulation indices (AAO, PDO, SOI, MEI, SPO) and the sea level pressure in the Southern Hemisphere, as well as to occurrence of Elementary Circulation Mechanisms (ECM). The revealed irregularity of the Na+ precipitation over the area under investigation is caused by different atmospheric circulation patterns as well as by influ‑ ence of basic Action Centers of the Atmosphere (ACA) in the Southern Hemisphere. The closest relationship is found to take place with South Pacific ACA (Vostok, 1976–2009) and with the South Indian ACA (SW‑42 and PV‑10). A presence of distant atmospheric relations (including one with El Nino) had been revealed for the inland areas. Changes in features of the atmospheric circulation in the South Indian Ocean over the last 200‑year period have been reconstructed on the basis of summarized Na+ records from the Vostok station area. Distinctive feature of the atmospheric circulation is the 40‑year periodicity with its increasing intensity during the following periods: 1805–1820, 1830–1860, 1890–1900, 1940–1950, and 1980–2000. In addition, we had revealed that changes in the atmospheric circulation in the Indian Ocean (Southern Hemisphere) ... |
format |
Article in Journal/Newspaper |
author |
E. Yu. Osipov O. P. Osipova L. P. Golobokova T. V. Khodzher |
author_facet |
E. Yu. Osipov O. P. Osipova L. P. Golobokova T. V. Khodzher |
author_sort |
E. Yu. Osipov |
title |
Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover |
title_short |
Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover |
title_full |
Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover |
title_fullStr |
Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover |
title_full_unstemmed |
Atmospheric circulation in the Indian Ocean sector of East Antarctica over the last 200 years according to chemical studies of snow‑firn cover |
title_sort |
atmospheric circulation in the indian ocean sector of east antarctica over the last 200 years according to chemical studies of snow‑firn cover |
publisher |
Nauka |
publishDate |
2017 |
url |
https://doi.org/10.15356/2076-6734-2017-2-170-184 https://doaj.org/article/4abcdc92e6db4f39a8427cf442823da5 |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
East Antarctica Pacific Indian Soi Vostok Station |
geographic_facet |
East Antarctica Pacific Indian Soi Vostok Station |
genre |
Antarc* Antarctica East Antarctica Антарктида |
genre_facet |
Antarc* Antarctica East Antarctica Антарктида |
op_source |
Лëд и снег, Vol 57, Iss 2, Pp 170-184 (2017) |
op_relation |
https://ice-snow.igras.ru/jour/article/view/376 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.15356/2076-6734-2017-2-170-184 https://doaj.org/article/4abcdc92e6db4f39a8427cf442823da5 |
op_doi |
https://doi.org/10.15356/2076-6734-2017-2-170-184 |
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Ice and Snow |
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57 |
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170 |
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184 |
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1766285995039260672 |