Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon
We used a high-resolution numerical model implementation to analyze the California Undercurrent (CU) dynamics along the Southern California Current System. In agreement with reported observations, the modeled CU was stronger during June-July and December-January, when it flowed continuously along Baja California and Southern California reaching long-term averages up to 6 cm s21. Previous research has associated the biannual CU intensification to the local dynamics off Southern California. Our results evidenced, however, that the passage of remote Semiannual Coastal-Trapped Waves (SCTW) primarily explained the semiannual CU variability. The CU was stronger 2-3 months after the passage of the upwelling SCTW phase, when the offshore propagation of Rossby waves, brought about by the SCTW transit, induced an energetic cross-shore pressure gradient that strengthened the subsurface poleward circulation along the continental slope. The SCTW were independent of the local wind; they corresponded to the northward extension of semiannual equatorial Kelvin waves that have been observed along the northeastern tropical Pacific.
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KOHA-OAI-ECOSUR:424412024-03-11T15:27:12ZSemiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon Gómez Valdivia, Felipe Doctor autor/a 13911 Parés Sierra, Alejandro autor/a 13912 Flores Morales, Ana Laura autor/a textengWe used a high-resolution numerical model implementation to analyze the California Undercurrent (CU) dynamics along the Southern California Current System. In agreement with reported observations, the modeled CU was stronger during June-July and December-January, when it flowed continuously along Baja California and Southern California reaching long-term averages up to 6 cm s21. Previous research has associated the biannual CU intensification to the local dynamics off Southern California. Our results evidenced, however, that the passage of remote Semiannual Coastal-Trapped Waves (SCTW) primarily explained the semiannual CU variability. The CU was stronger 2-3 months after the passage of the upwelling SCTW phase, when the offshore propagation of Rossby waves, brought about by the SCTW transit, induced an energetic cross-shore pressure gradient that strengthened the subsurface poleward circulation along the continental slope. The SCTW were independent of the local wind; they corresponded to the northward extension of semiannual equatorial Kelvin waves that have been observed along the northeastern tropical Pacific.We used a high-resolution numerical model implementation to analyze the California Undercurrent (CU) dynamics along the Southern California Current System. In agreement with reported observations, the modeled CU was stronger during June-July and December-January, when it flowed continuously along Baja California and Southern California reaching long-term averages up to 6 cm s21. Previous research has associated the biannual CU intensification to the local dynamics off Southern California. Our results evidenced, however, that the passage of remote Semiannual Coastal-Trapped Waves (SCTW) primarily explained the semiannual CU variability. The CU was stronger 2-3 months after the passage of the upwelling SCTW phase, when the offshore propagation of Rossby waves, brought about by the SCTW transit, induced an energetic cross-shore pressure gradient that strengthened the subsurface poleward circulation along the continental slope. The SCTW were independent of the local wind; they corresponded to the northward extension of semiannual equatorial Kelvin waves that have been observed along the northeastern tropical Pacific.Adobe Acrobat profesional 6.0 o superiorCirculación oceánicaVariación estacionalClimatologíaDisponible en líneaJournal of Geophysical Research. Oceanshttp://onlinelibrary.wiley.com/doi/10.1002/2016JC012350/fullDisponible para usuarios de ECOSUR con su clave de acceso |
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Circulación oceánica Variación estacional Climatología Circulación oceánica Variación estacional Climatología |
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Circulación oceánica Variación estacional Climatología Circulación oceánica Variación estacional Climatología Gómez Valdivia, Felipe Doctor autor/a 13911 Parés Sierra, Alejandro autor/a 13912 Flores Morales, Ana Laura autor/a Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon |
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We used a high-resolution numerical model implementation to analyze the California Undercurrent (CU) dynamics along the Southern California Current System. In agreement with reported observations, the modeled CU was stronger during June-July and December-January, when it flowed continuously along Baja California and Southern California reaching long-term averages up to 6 cm s21. Previous research has associated the biannual CU intensification to the local dynamics off Southern California. Our results evidenced, however, that the passage of remote Semiannual Coastal-Trapped Waves (SCTW) primarily explained the semiannual CU variability. The CU was stronger 2-3 months after the passage of the upwelling SCTW phase, when the offshore propagation of Rossby waves, brought about by the SCTW transit, induced an energetic cross-shore pressure gradient that strengthened the subsurface poleward circulation along the continental slope. The SCTW were independent of the local wind; they corresponded to the northward extension of semiannual equatorial Kelvin waves that have been observed along the northeastern tropical Pacific. |
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Texto |
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Circulación oceánica Variación estacional Climatología |
author |
Gómez Valdivia, Felipe Doctor autor/a 13911 Parés Sierra, Alejandro autor/a 13912 Flores Morales, Ana Laura autor/a |
author_facet |
Gómez Valdivia, Felipe Doctor autor/a 13911 Parés Sierra, Alejandro autor/a 13912 Flores Morales, Ana Laura autor/a |
author_sort |
Gómez Valdivia, Felipe Doctor autor/a 13911 |
title |
Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon |
title_short |
Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon |
title_full |
Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon |
title_fullStr |
Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon |
title_full_unstemmed |
Semiannual variability of the California Undercurrent along the Southern California Current System a tropical generated phenomenon |
title_sort |
semiannual variability of the california undercurrent along the southern california current system a tropical generated phenomenon |
url |
http://onlinelibrary.wiley.com/doi/10.1002/2016JC012350/full |
work_keys_str_mv |
AT gomezvaldiviafelipedoctorautora13911 semiannualvariabilityofthecaliforniaundercurrentalongthesoutherncaliforniacurrentsystematropicalgeneratedphenomenon AT paressierraalejandroautora13912 semiannualvariabilityofthecaliforniaundercurrentalongthesoutherncaliforniacurrentsystematropicalgeneratedphenomenon AT floresmoralesanalauraautora semiannualvariabilityofthecaliforniaundercurrentalongthesoutherncaliforniacurrentsystematropicalgeneratedphenomenon |
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