Climatology of the low-level winds over the intra- americas sea using satellite and reanalysis data
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| Author: | |
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| Format: | artículo original |
| Publication Date: | 2017 |
| Description: | The climatologies of five tropical low-level jets are studied through QuikScat, CCMP, ERA-Interim, and NCEP-DOE data. Three of the jets —the Tehuantepec jet, the Papagayo jet, and the Panama jet– are associated with topographic gaps in Central America. The other two jets —the Caribbean lowlevel jet (CLLJ) and the Choco jet— seem to be associated with deep convection in the Intertropical Convergence Zone (ITCZ) and the Panama Bight. The climatological analysis of the five jets shows similar annual cycles at the surface, except for the CLLJ, which has two maxima, one during summer and during winter. At surface level, the CCMP data shows a stronger CLLJ during winter than in summer, although QuikScat shows a summer CLLJ almost as strong as the winter jet, while surface data from ERA-Interim and NCEP-DOE reanalyses show a stronger summer CLLJ. The CLLJ, the Choco jet, and the Panama jet transport moisture to continental areas, unlike the Papagayo and Tehuantepec jets, which exit significant topographic gaps and generate a wind stress curl that excites Ekman pumping and upwelling in the underlying ocean. The upwelling caused by the Papagayo jet aids in the generation of the Costa Rica Dome (i.e. shoaling of the thermocline), which produces a hole in ITCZ precipitation. |
| Country: | Kérwá |
| Institution: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/76016 |
| Online Access: | http://cglobal.imn.ac.cr/index.php/publications/3626/ https://hdl.handle.net/10669/76016 |
| Keyword: | CLLJ NASH JET 551.6 Climatología y estado atmosférico |