Synoptic climatology and recent climate trends at Lake El'gygytgyn
We developed a synoptic climatology for Lake El'gygytgyn, Chukotka Russia, and explored modern climate trends affecting air temperatures there to aid in paleoclimate reconstructions of a 3.6 million-year-old sediment core taken from the lake. Our self-organized mapping (SOM) approach identified...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:5f7bcf6e63ec44ee96d0c5c93ebe6aca 2023-05-15T15:02:09+02:00 Synoptic climatology and recent climate trends at Lake El'gygytgyn M. Nolan E. N. Cassano J. J. Cassano 2013-06-01 https://doi.org/10.5194/cp-9-1271-2013 http://www.clim-past.net/9/1271/2013/cp-9-1271-2013.pdf https://doaj.org/article/5f7bcf6e63ec44ee96d0c5c93ebe6aca en eng Copernicus Publications doi:10.5194/cp-9-1271-2013 1814-9324 1814-9332 http://www.clim-past.net/9/1271/2013/cp-9-1271-2013.pdf https://doaj.org/article/5f7bcf6e63ec44ee96d0c5c93ebe6aca undefined Climate of the Past, Vol 9, Iss 3, Pp 1271-1286 (2013) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/cp-9-1271-2013 2023-01-22T17:53:26Z We developed a synoptic climatology for Lake El'gygytgyn, Chukotka Russia, and explored modern climate trends affecting air temperatures there to aid in paleoclimate reconstructions of a 3.6 million-year-old sediment core taken from the lake. Our self-organized mapping (SOM) approach identified 35 synoptic weather patterns, based on sea level pressure, that span the range of synoptic patterns influencing the study domain over the 1961–2009 NCEP/NCAR analysis period. We found strong seasonality in modern weather patterns, with summer weather primarily characterized by weak low pressure systems over the Arctic Ocean or Siberia and winter weather primarily characterized by strong high pressure over the Arctic Ocean and strong low pressure in the Pacific Ocean. In general, the primary source of variation in air temperatures came from the dominant patterns in each season, which we identify in the text, and nearly all of the dominant weather patterns here have shown increasing temperatures. We found that nearly all of the warming in mean annual temperature over the past 50 yr (about 3 °C) occurred during sub-freezing conditions on either side of summer (that is, spring and fall). Here we found that the most summer-like weather patterns (low pressures to the north) in the shoulder seasons were responsible for much of the change. Finally, we compared the warmest 15 yr of the record (1995–2009) to the coolest (1961–1975) and found that changes in thermodynamics of weather were about 3 to 300 times more important than changes in frequency of weather patterns in controlling temperature variations during spring and fall, respectively. That is, in the modern record, general warming (local or advected) is more important by orders of magnitude than changes in storm tracks in controlling air temperature at Lake El'gygytgyn. We conclude with a discussion of how these results may be relevant to the paleoclimate reconstruction efforts and how this relevancy could be tested further. Article in Journal/Newspaper Arctic Arctic Ocean Chukotka Siberia Unknown Arctic Arctic Ocean Pacific Climate of the Past 9 3 1271 1286 |
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envir geo M. Nolan E. N. Cassano J. J. Cassano Synoptic climatology and recent climate trends at Lake El'gygytgyn |
topic_facet |
envir geo |
description |
We developed a synoptic climatology for Lake El'gygytgyn, Chukotka Russia, and explored modern climate trends affecting air temperatures there to aid in paleoclimate reconstructions of a 3.6 million-year-old sediment core taken from the lake. Our self-organized mapping (SOM) approach identified 35 synoptic weather patterns, based on sea level pressure, that span the range of synoptic patterns influencing the study domain over the 1961–2009 NCEP/NCAR analysis period. We found strong seasonality in modern weather patterns, with summer weather primarily characterized by weak low pressure systems over the Arctic Ocean or Siberia and winter weather primarily characterized by strong high pressure over the Arctic Ocean and strong low pressure in the Pacific Ocean. In general, the primary source of variation in air temperatures came from the dominant patterns in each season, which we identify in the text, and nearly all of the dominant weather patterns here have shown increasing temperatures. We found that nearly all of the warming in mean annual temperature over the past 50 yr (about 3 °C) occurred during sub-freezing conditions on either side of summer (that is, spring and fall). Here we found that the most summer-like weather patterns (low pressures to the north) in the shoulder seasons were responsible for much of the change. Finally, we compared the warmest 15 yr of the record (1995–2009) to the coolest (1961–1975) and found that changes in thermodynamics of weather were about 3 to 300 times more important than changes in frequency of weather patterns in controlling temperature variations during spring and fall, respectively. That is, in the modern record, general warming (local or advected) is more important by orders of magnitude than changes in storm tracks in controlling air temperature at Lake El'gygytgyn. We conclude with a discussion of how these results may be relevant to the paleoclimate reconstruction efforts and how this relevancy could be tested further. |
format |
Article in Journal/Newspaper |
author |
M. Nolan E. N. Cassano J. J. Cassano |
author_facet |
M. Nolan E. N. Cassano J. J. Cassano |
author_sort |
M. Nolan |
title |
Synoptic climatology and recent climate trends at Lake El'gygytgyn |
title_short |
Synoptic climatology and recent climate trends at Lake El'gygytgyn |
title_full |
Synoptic climatology and recent climate trends at Lake El'gygytgyn |
title_fullStr |
Synoptic climatology and recent climate trends at Lake El'gygytgyn |
title_full_unstemmed |
Synoptic climatology and recent climate trends at Lake El'gygytgyn |
title_sort |
synoptic climatology and recent climate trends at lake el'gygytgyn |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-1271-2013 http://www.clim-past.net/9/1271/2013/cp-9-1271-2013.pdf https://doaj.org/article/5f7bcf6e63ec44ee96d0c5c93ebe6aca |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean Chukotka Siberia |
genre_facet |
Arctic Arctic Ocean Chukotka Siberia |
op_source |
Climate of the Past, Vol 9, Iss 3, Pp 1271-1286 (2013) |
op_relation |
doi:10.5194/cp-9-1271-2013 1814-9324 1814-9332 http://www.clim-past.net/9/1271/2013/cp-9-1271-2013.pdf https://doaj.org/article/5f7bcf6e63ec44ee96d0c5c93ebe6aca |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-9-1271-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1271 |
op_container_end_page |
1286 |
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