Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales
Variability of mid-latitude blocking in the boreal winter northern hemisphere is investigated for the period 1960/61 to 2001/02 by means of relaxation experiments with the model of the European Center for Medium-Range Weather Forecasts. It is shown that there is pronounced interannual and decadal va...
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Online Access: | https://oceanrep.geomar.de/id/eprint/30182/ https://oceanrep.geomar.de/id/eprint/30182/1/gollan_greatbatch_jung15.pdf https://doi.org/10.1002/2015GL066572 |
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ftoceanrep:oai:oceanrep.geomar.de:30182 2023-05-15T17:32:24+02:00 Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales Gollan, Gereon Greatbatch, Richard John Jung, Thomas 2015-11-28 text https://oceanrep.geomar.de/id/eprint/30182/ https://oceanrep.geomar.de/id/eprint/30182/1/gollan_greatbatch_jung15.pdf https://doi.org/10.1002/2015GL066572 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/30182/1/gollan_greatbatch_jung15.pdf Gollan, G. , Greatbatch, R. J. and Jung, T. (2015) Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales. Open Access Geophysical Research Letters, 42 (22). 10,037-10,046. DOI 10.1002/2015GL066572 <https://doi.org/10.1002/2015GL066572>. doi:10.1002/2015GL066572 info:eu-repo/semantics/openAccess Article PeerReviewed 2015 ftoceanrep https://doi.org/10.1002/2015GL066572 2023-04-07T15:21:26Z Variability of mid-latitude blocking in the boreal winter northern hemisphere is investigated for the period 1960/61 to 2001/02 by means of relaxation experiments with the model of the European Center for Medium-Range Weather Forecasts. It is shown that there is pronounced interannual and decadal variability in blocking, especially over the Eurasian continent, consistent with previous studies. The relaxation experiments show that realistic variability in the tropics can account for a significant part of observed interannual blocking variability, but also that about half of the observed variability can only be explained by extratropical tropospheric variability. On the quasi-decadal time scale, extratropical sea surface temperature and sea-ice, in addition to tropical variability, play a more important role. The stratosphere, which has been shown to influence interannual variability of the North Atlantic Oscillation in previous studies, has no significant influence on blocking according to our analysis. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 42 22 10,037 10,046 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Variability of mid-latitude blocking in the boreal winter northern hemisphere is investigated for the period 1960/61 to 2001/02 by means of relaxation experiments with the model of the European Center for Medium-Range Weather Forecasts. It is shown that there is pronounced interannual and decadal variability in blocking, especially over the Eurasian continent, consistent with previous studies. The relaxation experiments show that realistic variability in the tropics can account for a significant part of observed interannual blocking variability, but also that about half of the observed variability can only be explained by extratropical tropospheric variability. On the quasi-decadal time scale, extratropical sea surface temperature and sea-ice, in addition to tropical variability, play a more important role. The stratosphere, which has been shown to influence interannual variability of the North Atlantic Oscillation in previous studies, has no significant influence on blocking according to our analysis. |
format |
Article in Journal/Newspaper |
author |
Gollan, Gereon Greatbatch, Richard John Jung, Thomas |
spellingShingle |
Gollan, Gereon Greatbatch, Richard John Jung, Thomas Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales |
author_facet |
Gollan, Gereon Greatbatch, Richard John Jung, Thomas |
author_sort |
Gollan, Gereon |
title |
Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales |
title_short |
Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales |
title_full |
Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales |
title_fullStr |
Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales |
title_full_unstemmed |
Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales |
title_sort |
origin of variability in northern hemisphere winter blocking on interannual to decadal time scales |
publisher |
AGU (American Geophysical Union) |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/30182/ https://oceanrep.geomar.de/id/eprint/30182/1/gollan_greatbatch_jung15.pdf https://doi.org/10.1002/2015GL066572 |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/30182/1/gollan_greatbatch_jung15.pdf Gollan, G. , Greatbatch, R. J. and Jung, T. (2015) Origin of Variability in Northern Hemisphere Winter Blocking on Interannual to Decadal Time Scales. Open Access Geophysical Research Letters, 42 (22). 10,037-10,046. DOI 10.1002/2015GL066572 <https://doi.org/10.1002/2015GL066572>. doi:10.1002/2015GL066572 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015GL066572 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
22 |
container_start_page |
10,037 |
op_container_end_page |
10,046 |
_version_ |
1766130507091804160 |