Twentieth century correlations between extratropical SST variability and ITCZ shifts
The Intertropical Convergence Zone (ITCZ) is a global-scale band of tropical precipitation lying, in the annual mean, just north of the equator. Its position can be tied to the atmosphere's energy balance: the Northern Hemisphere is heated more strongly than the Southern Hemisphere, biasing the...
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ftmit:oai:dspace.mit.edu:1721.1/118397 2023-06-11T04:14:25+02:00 Twentieth century correlations between extratropical SST variability and ITCZ shifts Donohoe, Aaron Green, Brian Marcus Marshall, John C Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Green, Brian Marcus Marshall, John C 2018-09-26T18:03:17Z application/pdf http://hdl.handle.net/1721.1/118397 unknown American Geophysical Union (AGU) http://dx.doi.org/10.1002/2017GL075044 Geophysical Research Letters 0094-08276 http://hdl.handle.net/1721.1/118397 Green, Brian, et al. “Twentieth Century Correlations between Extratropical SST Variability and ITCZ Shifts: AMO, PDO, and ITCZ Variability.” Geophysical Research Letters, vol. 44, no. 17, Sept. 2017, pp. 9039–47. © 2017 The Authors. orcid:0000-0002-4605-8991 orcid:0000-0001-9230-3591 Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ Wiley Article http://purl.org/eprint/type/JournalArticle 2018 ftmit https://doi.org/10.1002/2017GL075044 2023-05-29T08:20:21Z The Intertropical Convergence Zone (ITCZ) is a global-scale band of tropical precipitation lying, in the annual mean, just north of the equator. Its position can be tied to the atmosphere's energy balance: the Northern Hemisphere is heated more strongly than the Southern Hemisphere, biasing the atmosphere's circulation and ITCZ north of the equator. In the context of this energy balance framework, we examine multidecadal connections between variations in the position of the global ITCZ and indices of extratropical sea surface temperature (SST) variability over the twentieth century. We find that the ITCZ and atmospheric circulation are shifted farther to the north during periods when North Atlantic and North Pacific SSTs are anomalously warm. Additionally, a warmer North Atlantic is correlated with a relatively warm Northern Hemisphere atmosphere. Our results suggest an important role for the ocean circulation in modulating ITCZ migrations on decade-and-longer timescales. United States. National Oceanic and Atmospheric Administration Article in Journal/Newspaper North Atlantic DSpace@MIT (Massachusetts Institute of Technology) Pacific Geophysical Research Letters 44 17 9039 9047 |
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DSpace@MIT (Massachusetts Institute of Technology) |
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The Intertropical Convergence Zone (ITCZ) is a global-scale band of tropical precipitation lying, in the annual mean, just north of the equator. Its position can be tied to the atmosphere's energy balance: the Northern Hemisphere is heated more strongly than the Southern Hemisphere, biasing the atmosphere's circulation and ITCZ north of the equator. In the context of this energy balance framework, we examine multidecadal connections between variations in the position of the global ITCZ and indices of extratropical sea surface temperature (SST) variability over the twentieth century. We find that the ITCZ and atmospheric circulation are shifted farther to the north during periods when North Atlantic and North Pacific SSTs are anomalously warm. Additionally, a warmer North Atlantic is correlated with a relatively warm Northern Hemisphere atmosphere. Our results suggest an important role for the ocean circulation in modulating ITCZ migrations on decade-and-longer timescales. United States. National Oceanic and Atmospheric Administration |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Green, Brian Marcus Marshall, John C |
format |
Article in Journal/Newspaper |
author |
Donohoe, Aaron Green, Brian Marcus Marshall, John C |
spellingShingle |
Donohoe, Aaron Green, Brian Marcus Marshall, John C Twentieth century correlations between extratropical SST variability and ITCZ shifts |
author_facet |
Donohoe, Aaron Green, Brian Marcus Marshall, John C |
author_sort |
Donohoe, Aaron |
title |
Twentieth century correlations between extratropical SST variability and ITCZ shifts |
title_short |
Twentieth century correlations between extratropical SST variability and ITCZ shifts |
title_full |
Twentieth century correlations between extratropical SST variability and ITCZ shifts |
title_fullStr |
Twentieth century correlations between extratropical SST variability and ITCZ shifts |
title_full_unstemmed |
Twentieth century correlations between extratropical SST variability and ITCZ shifts |
title_sort |
twentieth century correlations between extratropical sst variability and itcz shifts |
publisher |
American Geophysical Union (AGU) |
publishDate |
2018 |
url |
http://hdl.handle.net/1721.1/118397 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Wiley |
op_relation |
http://dx.doi.org/10.1002/2017GL075044 Geophysical Research Letters 0094-08276 http://hdl.handle.net/1721.1/118397 Green, Brian, et al. “Twentieth Century Correlations between Extratropical SST Variability and ITCZ Shifts: AMO, PDO, and ITCZ Variability.” Geophysical Research Letters, vol. 44, no. 17, Sept. 2017, pp. 9039–47. © 2017 The Authors. orcid:0000-0002-4605-8991 orcid:0000-0001-9230-3591 |
op_rights |
Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/2017GL075044 |
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Geophysical Research Letters |
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44 |
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17 |
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9039 |
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9047 |
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1768392394162569216 |