Enriched Analyses with Assimilation of SALLJEX Data

YANINA GARCIA SKABAR; MATILDE NICOLINI

JOURNAL OF APPLIED METEOROLOGY

American Meteorological Society

Lugar: Boston; Año: 2009 vol. 48 p. 2425 - 2440

0894-8763

This paper aims at generating a set of enriched analyses by assimilating the data collected during the SouthAmerican Low-Level Jet Experiment (SALLJEX) in southeastern South America during the summer season2002/03. The analyses are generated with the Brazilian Regional Atmospheric Modeling System (BRAMS)using all available observations and achieving 20-km horizontal resolution and 3-h temporal resolution. Thispaper describes the methods used to generate and evaluate the analyses. The results indicate that the methodis appropriate because data assimilation provides an improved fit between analyses and observations. Inaddition, enriched analyses show a better representation of mesoscale structure in case studies. This satisfactoryevaluation allows one to use the set of analyses to perform case studies at higher resolution than iscurrently available, with the certainty that these analyses reproduce the atmospheric conditions better thanthose that do not assimilate data.