Mostrar el registro sencillo del ítem Flores Rojas, José Luis Moya Álvarez, Aldo Saturnino Valdivia Prado, Jairo Michael Piñas-Laura, Manuel Kumar, Shailendra Karam, Hugo Abi Villalobos Puma, Elver Edmundo Martínez-Castro, Daniel Silva Vidal, Yamina
dc.coverage.spatial Andes
dc.coverage.spatial Cuenca del Mantaro
dc.coverage.spatial Huancayo 2020-08-25T13:14:16Z 2020-08-25T13:14:16Z 2021-01-15
dc.identifier.citation Flores-Rojas, J. L., Moya-Álvarez, A. S., Valdivia-Prado, J. M., Piñas-Laura, M., Kumar, S., Karam, H. A., . . . Silva, Y. (2021). On the dynamic mechanisms of intense rainfall events in the central Andes of Peru, Mantaro valley.==$Atmospheric Research, 248,$== 105188. es_ES
dc.identifier.govdoc index-oti2018
dc.description.abstract The present study was aimed at analysing the main atmospheric dynamic mechanisms associated with the occurrence of intense rainfall events above the Huancayo observatory (12.05°S, 75.32°W, 3313 m asl) in the central Andes of Perú (Mantaro valley) from January 2018 to April 2019. To identify the rainfall events, we used a set of instruments from the laboratory of physics, microphysics and radiation (LAMAR) composed by in-situ pluviometric observations, satellite remote sensing data (GPM), Cloud Radar (MIRA-35c), Boundary Layer Tropospheric Radar (BLTR) and downscaling model simulations with WRF (resolutions: 18 km, 6 km and 2 km) and ARPS (0.5 km) models to analyse the dynamics of the atmosphere for the synoptic, meso and local processes that control the occurrence of these rainfall events. The results showed that all intense rainfall events are associated with the presence of thermal meso-scale circulations that transport moisture fluxes through passes with gentle slopes along both sides of the Andes. The easterly moisture fluxes come in from the South America Low Level Jet (SALLJ) and the westerly moisture fluxes from the Pacific Ocean. The arrival of these moisture flows to regions within the Mantaro valley depends on their coupling with the circulations at medium and high levels of the atmosphere. At the synoptic scale, the results show that the rainfall events can be separated into two groups: the first one associated with westerly circulations (WC) at the mid and upper levels of the atmosphere, generated by the weakening and eastern displacement of the anticyclonic Bolivian high-North east low (BH-NE) system, and the second associated with easterly circulations (EC) at the mid and upper levels of the atmosphere, generated by the intensification of the BH-NE system. The observed and simulated results showed that multicell convective systems of WC events are more extensive and deeper than EC events. This situation can be explained as the convergence of moisture fluxes from opposite directions occurred within the Mantaro basin for WC events. In contrast, for EC events, the convergence develops at the east Andes mountain range, following which the multicell storm system propagates westward, driven by easterly circulations. The EC events occur mostly in the summer months, while the WC events occur mostly in the autumn and spring months. Moreover, apparently the inertia gravity waves (IGWs) formed in the Amazon basin transport moisture and energy to the central Andes plateau and intensify the convection processes. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof urn:issn:0169-8095
dc.rights info:eu-repo/semantics/closedAccess es_ES
dc.subject Rainfall events es_ES
dc.subject Dynamic analysis es_ES
dc.subject Mantaro basin es_ES
dc.subject Model simulations es_ES
dc.subject Inertia gravity waves es_ES
dc.subject LAMAR es_ES
dc.title On the dynamic mechanisms of intense rainfall events in the central Andes of Peru, Mantaro valley es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.identifier.journal Atmospheric Research es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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