Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions
The teleconnections between meteorological parameters of the Arctic and the eastern Baltic Sea regions were analysed based on the NCEP-CFSR and ERA-Interim reanalysis data for 1979–2015. The eastern Baltic Sea region was characterised by meteorological values at a testing point (TP) in southern Esto...
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ftcopernicus:oai:publications.copernicus.org:esd58263 2023-05-15T14:47:07+02:00 Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions Jakobson, Liisi Jakobson, Erko Post, Piia Jaagus, Jaak 2018-09-27 application/pdf https://doi.org/10.5194/esd-8-1019-2017 https://esd.copernicus.org/articles/8/1019/2017/ eng eng doi:10.5194/esd-8-1019-2017 https://esd.copernicus.org/articles/8/1019/2017/ eISSN: 2190-4987 Text 2018 ftcopernicus https://doi.org/10.5194/esd-8-1019-2017 2020-07-20T16:23:33Z The teleconnections between meteorological parameters of the Arctic and the eastern Baltic Sea regions were analysed based on the NCEP-CFSR and ERA-Interim reanalysis data for 1979–2015. The eastern Baltic Sea region was characterised by meteorological values at a testing point (TP) in southern Estonia (58° N, 26° E). Temperature at the 1000 hPa level at the TP have a strong negative correlation with the Greenland sector (the region between 55–80° N and 20–80° W) during all seasons except summer. Significant teleconnections are present in temperature profiles from 1000 to 500 hPa. The strongest teleconnections between the same parameter at the eastern Baltic Sea region and the Arctic are found in winter, but they are clearly affected by the Arctic Oscillation (AO) index. After removal of the AO index variability, correlations in winter were below ±0.5, while in other seasons there remained regions with strong (| R | > 0.5, p < 0.002) correlations. Strong correlations (| R | > 0.5) are also present between different climate variables (sea-level pressure, specific humidity, wind speed) at the TP and different regions of the Arctic. These teleconnections cannot be explained solely with the variability of circulation indices. The positive temperature anomaly of mild winter at the Greenland sector shifts towards east during the next seasons, reaching the Baltic Sea region in summer. This evolution is present at 60 and 65° N but is missing at higher latitudes. The most permanent lagged correlations in 1000 hPa temperature reveal that the temperature in summer at the TP is strongly predestined by temperature in the Greenland sector in the previous spring and winter. Text Arctic Greenland Copernicus Publications: E-Journals Arctic Greenland Earth System Dynamics 8 4 1019 1030 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The teleconnections between meteorological parameters of the Arctic and the eastern Baltic Sea regions were analysed based on the NCEP-CFSR and ERA-Interim reanalysis data for 1979–2015. The eastern Baltic Sea region was characterised by meteorological values at a testing point (TP) in southern Estonia (58° N, 26° E). Temperature at the 1000 hPa level at the TP have a strong negative correlation with the Greenland sector (the region between 55–80° N and 20–80° W) during all seasons except summer. Significant teleconnections are present in temperature profiles from 1000 to 500 hPa. The strongest teleconnections between the same parameter at the eastern Baltic Sea region and the Arctic are found in winter, but they are clearly affected by the Arctic Oscillation (AO) index. After removal of the AO index variability, correlations in winter were below ±0.5, while in other seasons there remained regions with strong (| R | > 0.5, p < 0.002) correlations. Strong correlations (| R | > 0.5) are also present between different climate variables (sea-level pressure, specific humidity, wind speed) at the TP and different regions of the Arctic. These teleconnections cannot be explained solely with the variability of circulation indices. The positive temperature anomaly of mild winter at the Greenland sector shifts towards east during the next seasons, reaching the Baltic Sea region in summer. This evolution is present at 60 and 65° N but is missing at higher latitudes. The most permanent lagged correlations in 1000 hPa temperature reveal that the temperature in summer at the TP is strongly predestined by temperature in the Greenland sector in the previous spring and winter. |
format |
Text |
author |
Jakobson, Liisi Jakobson, Erko Post, Piia Jaagus, Jaak |
spellingShingle |
Jakobson, Liisi Jakobson, Erko Post, Piia Jaagus, Jaak Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions |
author_facet |
Jakobson, Liisi Jakobson, Erko Post, Piia Jaagus, Jaak |
author_sort |
Jakobson, Liisi |
title |
Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions |
title_short |
Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions |
title_full |
Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions |
title_fullStr |
Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions |
title_full_unstemmed |
Atmospheric teleconnections between the Arctic and the eastern Baltic Sea regions |
title_sort |
atmospheric teleconnections between the arctic and the eastern baltic sea regions |
publishDate |
2018 |
url |
https://doi.org/10.5194/esd-8-1019-2017 https://esd.copernicus.org/articles/8/1019/2017/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
eISSN: 2190-4987 |
op_relation |
doi:10.5194/esd-8-1019-2017 https://esd.copernicus.org/articles/8/1019/2017/ |
op_doi |
https://doi.org/10.5194/esd-8-1019-2017 |
container_title |
Earth System Dynamics |
container_volume |
8 |
container_issue |
4 |
container_start_page |
1019 |
op_container_end_page |
1030 |
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1766318262594830336 |