Caracterización de los jets costeros sobre el mar peruano usando el modelo regional WRF

Adolfo Chamorro-Gómez; Francois Colas; Vincent Echevin; Jorge Tam

doi:10.53554/boletin.v37i2.372

Authors

Adolfo Chamorro-Gómez Instituto del Mar del Perú. Dirección General de Investigaciones en Oceanografía y Cambio Climático
Francois Colas LOCEAN-IPSL, Sorbonne Université/IRD/CNRS/MNHN https://orcid.org/0000-0002-5859-6586
Vincent Echevin LOCEAN-IPSL, Sorbonne Université/IRD/CNRS/MNHN https://orcid.org/0000-0003-3859-840X
Jorge Tam Instituto del Mar del Perú. Dirección General de Investigaciones en Oceanografía y Cambio Climático https://orcid.org/0000-0001-8224-4313

DOI:

https://doi.org/10.53554/boletin.v37i2.372

Keywords:

Jets costeros, Costa Peruana, Corriente en chorro, Modelo WRF

Abstract

Over the Peruvian sea, low-level atmospheric wind maxima occur frequently off the coast, known as coastal jets. These coastal jets are important in ocean dynamics and have significant impacts on climate and regional ecology, as well as on several human activities, so research on them is important. Our study presents the characteristics (frequency of occurrence, height, intensity, and direction) of coastal jets off the Peruvian coast, using high-resolution (7 km) atmospheric simulation data with the WRF regional model, for the period 1994-2003, following a set of criteria based on the analysis of vertical wind and temperature profiles. Based on the results of the analysis, we found that coastal jets over the Peruvian sea can occur all year round, albeit they vary in frequency and spatial location. In summer, these jets are more frequent and are concentrated very close to the coast, predominantly with an intensity between 8 and 10 m.s⁻¹ and a height between 200 and 300 m.a.s.l. In winter, coastal jets are less frequent and have a greater spatial extension, mostly with intensity between 9 and 11 m.s⁻¹ and a height between 400 and 500 m.a.s.l. The direction of coastal jets is predominantly south-southeast (parallel to the coastline) for all seasons, except in winter when the jet also has high occurrences from the southeast direction.

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