Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern
The recent increasing trend of <q>warm Arctic, cold continents</q> has attracted much attention, but it remains debatable as to what forces are behind this phenomenon. Here, we revisited surface-temperature variability over the Arctic and Eurasian continent by applying the Self-Organizin...
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ftcopernicus:oai:publications.copernicus.org:acpd85341 2023-05-15T14:34:27+02:00 Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern Yu, Lejiang Zhong, Shiyuan Sui, Cuijuan Sun, Bo 2020-07-28 application/pdf https://doi.org/10.5194/acp-2020-413 https://www.atmos-chem-phys-discuss.net/acp-2020-413/ eng eng doi:10.5194/acp-2020-413 https://www.atmos-chem-phys-discuss.net/acp-2020-413/ eISSN: 1680-7324 Text 2020 ftcopernicus https://doi.org/10.5194/acp-2020-413 2020-08-03T16:22:01Z The recent increasing trend of <q>warm Arctic, cold continents</q> has attracted much attention, but it remains debatable as to what forces are behind this phenomenon. Here, we revisited surface-temperature variability over the Arctic and Eurasian continent by applying the Self-Organizing-Map (SOM) technique to gridded daily surface temperature data. Nearly 40 % of the surface temperature trends are explained by the nine SOM patterns that depict the switch to the current warm Arctic-cold Eurasia pattern at the beginning of this century from the reversed pattern that dominated the 1980s and the 90s. Further, no cause-effect relationship is found between the Arctic sea-ice loss and the cold spells in high-mid latitude Eurasian continent suggested by earlier studies. Instead, the increasing trend in warm Arctic-cold Eurasia pattern appears to be related to the anomalous atmospheric circulations associated with two Rossby wavetrains triggered by rising sea surface temperature (SST) over the central North Pacific and the North Atlantic Oceans. On interdecadal timescale, the recent increase in the occurrences of the warm Arctic-cold Eurasia pattern is a fragment of the interdecadal variability of SST over the Atlantic Ocean as represented by the Atlantic Multidecadal Oscillations (AMO), and over the central Pacific Ocean. Text Arctic North Atlantic Sea ice Copernicus Publications: E-Journals Arctic Pacific |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The recent increasing trend of <q>warm Arctic, cold continents</q> has attracted much attention, but it remains debatable as to what forces are behind this phenomenon. Here, we revisited surface-temperature variability over the Arctic and Eurasian continent by applying the Self-Organizing-Map (SOM) technique to gridded daily surface temperature data. Nearly 40 % of the surface temperature trends are explained by the nine SOM patterns that depict the switch to the current warm Arctic-cold Eurasia pattern at the beginning of this century from the reversed pattern that dominated the 1980s and the 90s. Further, no cause-effect relationship is found between the Arctic sea-ice loss and the cold spells in high-mid latitude Eurasian continent suggested by earlier studies. Instead, the increasing trend in warm Arctic-cold Eurasia pattern appears to be related to the anomalous atmospheric circulations associated with two Rossby wavetrains triggered by rising sea surface temperature (SST) over the central North Pacific and the North Atlantic Oceans. On interdecadal timescale, the recent increase in the occurrences of the warm Arctic-cold Eurasia pattern is a fragment of the interdecadal variability of SST over the Atlantic Ocean as represented by the Atlantic Multidecadal Oscillations (AMO), and over the central Pacific Ocean. |
format |
Text |
author |
Yu, Lejiang Zhong, Shiyuan Sui, Cuijuan Sun, Bo |
spellingShingle |
Yu, Lejiang Zhong, Shiyuan Sui, Cuijuan Sun, Bo Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern |
author_facet |
Yu, Lejiang Zhong, Shiyuan Sui, Cuijuan Sun, Bo |
author_sort |
Yu, Lejiang |
title |
Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern |
title_short |
Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern |
title_full |
Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern |
title_fullStr |
Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern |
title_full_unstemmed |
Revisiting the trend in the occurrences of the warm Arctic-cold Eurasian continent temperature pattern |
title_sort |
revisiting the trend in the occurrences of the warm arctic-cold eurasian continent temperature pattern |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-2020-413 https://www.atmos-chem-phys-discuss.net/acp-2020-413/ |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic North Atlantic Sea ice |
genre_facet |
Arctic North Atlantic Sea ice |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-2020-413 https://www.atmos-chem-phys-discuss.net/acp-2020-413/ |
op_doi |
https://doi.org/10.5194/acp-2020-413 |
_version_ |
1766307487003181056 |