Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast
While the zonal-mean position of the intertropical convergence zone (ITCZ) is well explained using the zonal-mean energetic framework, the regional variations of the ITCZ have been more difficult to characterize. We show a simple metric, the interhemispheric tropical sea surface temperature (SST) co...
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ftmdpi:oai:mdpi.com:/2225-1154/10/3/30/ 2023-08-20T04:08:21+02:00 Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast Eric Mischell Jung-Eun Lee agris 2022-02-23 application/pdf https://doi.org/10.3390/cli10030030 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/cli10030030 https://creativecommons.org/licenses/by/4.0/ Climate; Volume 10; Issue 3; Pages: 30 tropical climate ocean-atmosphere interactions climate dynamics regional climate variability and change AMO and Pacific precipitation Text 2022 ftmdpi https://doi.org/10.3390/cli10030030 2023-08-01T04:15:22Z While the zonal-mean position of the intertropical convergence zone (ITCZ) is well explained using the zonal-mean energetic framework, the regional variations of the ITCZ have been more difficult to characterize. We show a simple metric, the interhemispheric tropical sea surface temperature (SST) contrast, is useful for estimating the local ITCZ position over seasonal and interannual timescales in modern observations. We demonstrate a linear correspondence between the SST contrast and ITCZ position across oceanic sectors. Though consistently linear, the sensitivity of the ITCZ position to the SST contrast varies from ~1°/K to ~7°/K depending on location. We also find that the location of the Western Pacific interannual ITCZ is negatively correlated with the temperature of the North Atlantic Ocean. This result may help put constraints on past and future regional migrations of the ITCZ. Text North Atlantic MDPI Open Access Publishing Pacific Climate 10 3 30 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
tropical climate ocean-atmosphere interactions climate dynamics regional climate variability and change AMO and Pacific precipitation |
spellingShingle |
tropical climate ocean-atmosphere interactions climate dynamics regional climate variability and change AMO and Pacific precipitation Eric Mischell Jung-Eun Lee Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast |
topic_facet |
tropical climate ocean-atmosphere interactions climate dynamics regional climate variability and change AMO and Pacific precipitation |
description |
While the zonal-mean position of the intertropical convergence zone (ITCZ) is well explained using the zonal-mean energetic framework, the regional variations of the ITCZ have been more difficult to characterize. We show a simple metric, the interhemispheric tropical sea surface temperature (SST) contrast, is useful for estimating the local ITCZ position over seasonal and interannual timescales in modern observations. We demonstrate a linear correspondence between the SST contrast and ITCZ position across oceanic sectors. Though consistently linear, the sensitivity of the ITCZ position to the SST contrast varies from ~1°/K to ~7°/K depending on location. We also find that the location of the Western Pacific interannual ITCZ is negatively correlated with the temperature of the North Atlantic Ocean. This result may help put constraints on past and future regional migrations of the ITCZ. |
format |
Text |
author |
Eric Mischell Jung-Eun Lee |
author_facet |
Eric Mischell Jung-Eun Lee |
author_sort |
Eric Mischell |
title |
Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast |
title_short |
Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast |
title_full |
Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast |
title_fullStr |
Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast |
title_full_unstemmed |
Observed Zonal Variations of the Relationship between ITCZ Position and Meridional Temperature Contrast |
title_sort |
observed zonal variations of the relationship between itcz position and meridional temperature contrast |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/cli10030030 |
op_coverage |
agris |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate; Volume 10; Issue 3; Pages: 30 |
op_relation |
https://dx.doi.org/10.3390/cli10030030 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/cli10030030 |
container_title |
Climate |
container_volume |
10 |
container_issue |
3 |
container_start_page |
30 |
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1774720550787088384 |