Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter
The impact of anomalous fall Arctic sea ice concentrations (SICs) on atmospheric patterns in the following winter is revisited by analysing results for two time periods: the most recent, satellite-era period (1979–2010) and a longer time-period (1950–2010). On the basis of Sept...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Stockholm University Press
2012-05-01
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| Series: | Tellus: Series A, Dynamic Meteorology and Oceanography |
| Subjects: | |
| Online Access: | http://www.tellusa.net/index.php/tellusa/article/view/18624/pdf_1 |
| _version_ | 1818539017682026496 |
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| author | Susanna Hopsch Judah Cohen Klaus Dethloff |
| author_facet | Susanna Hopsch Judah Cohen Klaus Dethloff |
| author_sort | Susanna Hopsch |
| collection | DOAJ |
| description | The impact of anomalous fall Arctic sea ice concentrations (SICs) on atmospheric patterns in the following winter is revisited by analysing results for two time periods: the most recent, satellite-era period (1979–2010) and a longer time-period (1950–2010). On the basis of September SICs for each time-period, an index was constructed which was used to identify anomalous high/low SIC years for both the original, as well as for the linearly detrended sea ice index. Identified years were then used to derive composites for the following winter's monthly atmospheric variables. Mid-troposphere geopotential height composites for winter months are in general reminiscent of the North Atlantic Oscillation pattern with high latitude maximum shifted towards the Barents Sea. Also, lower troposphere temperatures indicate the presence of cooler conditions over the continents during low SIC years. However, differences in the composite patterns are significant only for areas with limited spatial extent. While suggested pathways in previously published studies seem reasonable, our results show that these findings are not yet robust enough from a statistical significance perspective. More data (e.g. provided by longer, climate-quality reanalysis datasets) are needed before conclusions of impacts and feedbacks can be drawn with certainty. |
| first_indexed | 2024-12-11T21:36:30Z |
| format | Article |
| id | doaj.art-26e418140f59414c843a945fc6e2978f |
| institution | Directory Open Access Journal |
| issn | 0280-6495 1600-0870 |
| language | English |
| last_indexed | 2024-12-11T21:36:30Z |
| publishDate | 2012-05-01 |
| publisher | Stockholm University Press |
| record_format | Article |
| series | Tellus: Series A, Dynamic Meteorology and Oceanography |
| spelling | doaj.art-26e418140f59414c843a945fc6e2978f2022-12-22T00:50:00ZengStockholm University PressTellus: Series A, Dynamic Meteorology and Oceanography0280-64951600-08702012-05-0164011210.3402/tellusa.v64i0.18624Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winterSusanna HopschJudah CohenKlaus DethloffThe impact of anomalous fall Arctic sea ice concentrations (SICs) on atmospheric patterns in the following winter is revisited by analysing results for two time periods: the most recent, satellite-era period (1979–2010) and a longer time-period (1950–2010). On the basis of September SICs for each time-period, an index was constructed which was used to identify anomalous high/low SIC years for both the original, as well as for the linearly detrended sea ice index. Identified years were then used to derive composites for the following winter's monthly atmospheric variables. Mid-troposphere geopotential height composites for winter months are in general reminiscent of the North Atlantic Oscillation pattern with high latitude maximum shifted towards the Barents Sea. Also, lower troposphere temperatures indicate the presence of cooler conditions over the continents during low SIC years. However, differences in the composite patterns are significant only for areas with limited spatial extent. While suggested pathways in previously published studies seem reasonable, our results show that these findings are not yet robust enough from a statistical significance perspective. More data (e.g. provided by longer, climate-quality reanalysis datasets) are needed before conclusions of impacts and feedbacks can be drawn with certainty.http://www.tellusa.net/index.php/tellusa/article/view/18624/pdf_1Arctic sea iceatmospheric variabilityclimate variability |
| spellingShingle | Susanna Hopsch Judah Cohen Klaus Dethloff Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter Tellus: Series A, Dynamic Meteorology and Oceanography Arctic sea ice atmospheric variability climate variability |
| title | Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter |
| title_full | Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter |
| title_fullStr | Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter |
| title_full_unstemmed | Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter |
| title_short | Analysis of a link between fall Arctic sea ice concentration and atmospheric patterns in the following winter |
| title_sort | analysis of a link between fall arctic sea ice concentration and atmospheric patterns in the following winter |
| topic | Arctic sea ice atmospheric variability climate variability |
| url | http://www.tellusa.net/index.php/tellusa/article/view/18624/pdf_1 |
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