North Atlantic Ocean-atmosphere interaction on intraseasonal time scales
Summer 2004. Also issued as author's thesis (M.S.) -- Colorado State University, 2004. NSF grant ATM-320959, NSF grant ATM-0132190, and National Science Foundation on cover. Includes bibliographical references. A substantial fraction of midlatitude sea surface temperature (SST) variability on t...
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ftcolostateunidc:oai:mountainscholar.org:10217/234481 2023-05-15T17:26:58+02:00 North Atlantic Ocean-atmosphere interaction on intraseasonal time scales Ciasto, Laura M. 2022-03-02T18:01:16Z reports application/pdf https://hdl.handle.net/10217/234481 English eng eng Colorado State University. Libraries Atmospheric Science Papers (Blue Books) Atmospheric science paper, no. 773 https://hdl.handle.net/10217/234481 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. Ocean-atmosphere interaction -- North Atlantic Ocean Text 2022 ftcolostateunidc 2023-03-23T18:34:24Z Summer 2004. Also issued as author's thesis (M.S.) -- Colorado State University, 2004. NSF grant ATM-320959, NSF grant ATM-0132190, and National Science Foundation on cover. Includes bibliographical references. A substantial fraction of midlatitude sea surface temperature (SST) variability on time scales ranging from months to years can be interpreted as the passive thermodynamic response of the ocean mixed layer to stochastic atmospheric forcing. Subsequently, the dominant structures of monthly and seasonal mean Northern Hemisphere SST variability owe their existence to variations in the extratropical atmosphere. To what extent midlatitude SST variability, in tum, gives rise to anomalies in the dominant structures of extratropical atmospheric variability remains unclear. Presumably, if the extratropical atmosphere exhibits a deep and statistically significant response to midlatitude SST anomalies, the dynamics of the response should occur on time scales shorter than the monthly and seasonal mean data used in most observational analyses of midlatitude atmosphere-ocean interaction. The motivation of the thesis is to investigate the interaction between North Atlantic SST variability and the extratropical atmospheric circulation on intraseasonal time scales. First, the climatology of the North Atlantic SST field and the overlying atmospheric circulation is described. The largest variance in intraseasonal and seasonal mean SST anomalies is located within a zone of enhanced SST gradients in the Gulf Stream extension. The region of maximum SST variance also underlies a region of marked wintertime cyclogenesis over the western edge of the North Atlantic storm track. Patterns of North Atlantic weekly SST variability are further investigated using Empirical Orthogonal Function (EOF) analysis. EOFs of both weekly summertime and wintertime SST anomalies reflect a mix of two patterns, variability in the Gulf Stream extension region and a meridionally banded structure of SST anomalies commonly referred to as the ... Text North Atlantic Digital Collections of Colorado (Colorado State University) |
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Digital Collections of Colorado (Colorado State University) |
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English |
topic |
Ocean-atmosphere interaction -- North Atlantic Ocean |
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Ocean-atmosphere interaction -- North Atlantic Ocean Ciasto, Laura M. North Atlantic Ocean-atmosphere interaction on intraseasonal time scales |
topic_facet |
Ocean-atmosphere interaction -- North Atlantic Ocean |
description |
Summer 2004. Also issued as author's thesis (M.S.) -- Colorado State University, 2004. NSF grant ATM-320959, NSF grant ATM-0132190, and National Science Foundation on cover. Includes bibliographical references. A substantial fraction of midlatitude sea surface temperature (SST) variability on time scales ranging from months to years can be interpreted as the passive thermodynamic response of the ocean mixed layer to stochastic atmospheric forcing. Subsequently, the dominant structures of monthly and seasonal mean Northern Hemisphere SST variability owe their existence to variations in the extratropical atmosphere. To what extent midlatitude SST variability, in tum, gives rise to anomalies in the dominant structures of extratropical atmospheric variability remains unclear. Presumably, if the extratropical atmosphere exhibits a deep and statistically significant response to midlatitude SST anomalies, the dynamics of the response should occur on time scales shorter than the monthly and seasonal mean data used in most observational analyses of midlatitude atmosphere-ocean interaction. The motivation of the thesis is to investigate the interaction between North Atlantic SST variability and the extratropical atmospheric circulation on intraseasonal time scales. First, the climatology of the North Atlantic SST field and the overlying atmospheric circulation is described. The largest variance in intraseasonal and seasonal mean SST anomalies is located within a zone of enhanced SST gradients in the Gulf Stream extension. The region of maximum SST variance also underlies a region of marked wintertime cyclogenesis over the western edge of the North Atlantic storm track. Patterns of North Atlantic weekly SST variability are further investigated using Empirical Orthogonal Function (EOF) analysis. EOFs of both weekly summertime and wintertime SST anomalies reflect a mix of two patterns, variability in the Gulf Stream extension region and a meridionally banded structure of SST anomalies commonly referred to as the ... |
format |
Text |
author |
Ciasto, Laura M. |
author_facet |
Ciasto, Laura M. |
author_sort |
Ciasto, Laura M. |
title |
North Atlantic Ocean-atmosphere interaction on intraseasonal time scales |
title_short |
North Atlantic Ocean-atmosphere interaction on intraseasonal time scales |
title_full |
North Atlantic Ocean-atmosphere interaction on intraseasonal time scales |
title_fullStr |
North Atlantic Ocean-atmosphere interaction on intraseasonal time scales |
title_full_unstemmed |
North Atlantic Ocean-atmosphere interaction on intraseasonal time scales |
title_sort |
north atlantic ocean-atmosphere interaction on intraseasonal time scales |
publisher |
Colorado State University. Libraries |
publishDate |
2022 |
url |
https://hdl.handle.net/10217/234481 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Atmospheric Science Papers (Blue Books) Atmospheric science paper, no. 773 https://hdl.handle.net/10217/234481 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
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