Northern Hemisphere snow cover and atmospheric blocking variability

The interseasonal relationship between Northern Hemisphere (NH) snow cover and regional blocking patterns is explored for a 31-year data set. It is found that snow cover exerts an important influence on regional atmospheric blocking, which, in turn, modulates snow cover extent at subcontinental scal...

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Authors: García Herrera, Ricardo Francisco, Barriopedro Cepero, David
Format: article
Publication Date:2006
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/50981
Online Access:https://hdl.handle.net/20.500.14352/50981
Access Level:Open access
Keyword:52
Indian Monsoon Rainfall
Atlantic Oscillation
Interannual Variability
Weather Regimes
Climate
Impact
Nao
Temperature
Circulation
Extent
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
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oai_identifier_str oai:docta.ucm.es:20.500.14352/50981
network_acronym_str ES
network_name_str España
repository_id_str
spelling Northern Hemisphere snow cover and atmospheric blocking variabilityGarcía Herrera, Ricardo FranciscoBarriopedro Cepero, David52Indian Monsoon RainfallAtlantic OscillationInterannual VariabilityWeather RegimesClimateImpactNaoTemperatureCirculationExtentAstrofísicaAstronomía (Física)Física atmosférica2501 Ciencias de la AtmósferaThe interseasonal relationship between Northern Hemisphere (NH) snow cover and regional blocking patterns is explored for a 31-year data set. It is found that snow cover exerts an important influence on regional atmospheric blocking, which, in turn, modulates snow cover extent at subcontinental scales. Observational results provide strong evidence of two primary linkages in the seasonal snow cover-blocking relationship that support an interannual persistence cycle: The first one links winter blocking over the Atlantic and the subsequent spring (summer) Eurasian (North American) snow cover anomalies; the second one implies that spring (summer) Eurasian (North American) snow cover precedes an anomalous winter Atlantic blocking activity. We describe the temporal stages of the snow cover-blocking relationship in the framework of a six-step conceptual model. According to that, an enhanced Atlantic blocking activity in winter favors a later spring snow disappearance through an enhanced cold advection toward western Eurasia. The resulting snow cover anomalies partially force an opposite-sign blocking response over west and central Pacific which is sustained through spring and early summer, presumably because of the persistence of snow cover anomalies. This anomalous pattern seems to play a role in the propagation of snow cover anomalies from Eurasia in spring to the Hudson’s Bay region of North America in summer. The excessive snow cover over this region induces an asymmetrical temperature distribution, which, in turn, favors blocking activity over Europe and the West Pacific. The connection between autumn and winter climates is not clear but it could be related with the ability of autumn high ATL blocking activity to determine an early snow cover appearance in October over western Eurasia. This linkage completes a snow cover-blocking cycle of interactions which identifies snow cover as a candidate for the recently observed blocking trends and a contributor to the interannual persistence of winter climate.American Geophysical UnionUniversidad Complutense de Madrid20062006-11-0420062006-11-04journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/50981reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/509812026-06-02T12:44:21Z
dc.title.none.fl_str_mv Northern Hemisphere snow cover and atmospheric blocking variability
title Northern Hemisphere snow cover and atmospheric blocking variability
spellingShingle Northern Hemisphere snow cover and atmospheric blocking variability
García Herrera, Ricardo Francisco
52
Indian Monsoon Rainfall
Atlantic Oscillation
Interannual Variability
Weather Regimes
Climate
Impact
Nao
Temperature
Circulation
Extent
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
title_short Northern Hemisphere snow cover and atmospheric blocking variability
title_full Northern Hemisphere snow cover and atmospheric blocking variability
title_fullStr Northern Hemisphere snow cover and atmospheric blocking variability
title_full_unstemmed Northern Hemisphere snow cover and atmospheric blocking variability
title_sort Northern Hemisphere snow cover and atmospheric blocking variability
dc.creator.none.fl_str_mv García Herrera, Ricardo Francisco
Barriopedro Cepero, David
author García Herrera, Ricardo Francisco
author_facet García Herrera, Ricardo Francisco
Barriopedro Cepero, David
author_role author
author2 Barriopedro Cepero, David
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Indian Monsoon Rainfall
Atlantic Oscillation
Interannual Variability
Weather Regimes
Climate
Impact
Nao
Temperature
Circulation
Extent
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
topic 52
Indian Monsoon Rainfall
Atlantic Oscillation
Interannual Variability
Weather Regimes
Climate
Impact
Nao
Temperature
Circulation
Extent
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
description The interseasonal relationship between Northern Hemisphere (NH) snow cover and regional blocking patterns is explored for a 31-year data set. It is found that snow cover exerts an important influence on regional atmospheric blocking, which, in turn, modulates snow cover extent at subcontinental scales. Observational results provide strong evidence of two primary linkages in the seasonal snow cover-blocking relationship that support an interannual persistence cycle: The first one links winter blocking over the Atlantic and the subsequent spring (summer) Eurasian (North American) snow cover anomalies; the second one implies that spring (summer) Eurasian (North American) snow cover precedes an anomalous winter Atlantic blocking activity. We describe the temporal stages of the snow cover-blocking relationship in the framework of a six-step conceptual model. According to that, an enhanced Atlantic blocking activity in winter favors a later spring snow disappearance through an enhanced cold advection toward western Eurasia. The resulting snow cover anomalies partially force an opposite-sign blocking response over west and central Pacific which is sustained through spring and early summer, presumably because of the persistence of snow cover anomalies. This anomalous pattern seems to play a role in the propagation of snow cover anomalies from Eurasia in spring to the Hudson’s Bay region of North America in summer. The excessive snow cover over this region induces an asymmetrical temperature distribution, which, in turn, favors blocking activity over Europe and the West Pacific. The connection between autumn and winter climates is not clear but it could be related with the ability of autumn high ATL blocking activity to determine an early snow cover appearance in October over western Eurasia. This linkage completes a snow cover-blocking cycle of interactions which identifies snow cover as a candidate for the recently observed blocking trends and a contributor to the interannual persistence of winter climate.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-11-04
2006
2006-11-04
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/50981
url https://hdl.handle.net/20.500.14352/50981
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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