Enriched Analyses with Assimilation of SALLJEX Data

Author(s)

Garcia Skabar, Yanina ^{[1, 2]} ; Nicolini, Matilde ^[3]

Affiliation

^[1] Univ Buenos Aires, Fac Agron, Buenos Aires, DF - Argentina

^[2] Consejo Nacl Invest Cient & Tecn, Ctr Invest Mar & Atmosfera, Serv Meteorol Nacl, RA-1033 Buenos Aires, DF - Argentina

^[3] Univ Buenos Aires, FCE&N, Dept Ciencias Atmosfera & Oceanos, Buenos Aires, DF - Argentina

• Document type: Journal article
• Source: Journal of Applied Meteorology and Climatology; v. 48, n. 12, p. 2425-2440, DEC 2009.
• Web of Science Citations: 4

Abstract

This paper aims at generating a set of enriched analyses by assimilating the data collected during the South American Low-Level Jet Experiment (SALLJEX) in southeastern South America during the summer season 2002/03. 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. This paper describes the methods used to generate and evaluate the analyses. The results indicate that the method is appropriate because data assimilation provides an improved fit between analyses and observations. In addition, enriched analyses show a better representation of mesoscale structure in case studies. This satisfactory evaluation allows one to use the set of analyses to perform case studies at higher resolution than is currently available, with the certainty that these analyses reproduce the atmospheric conditions better than those that do not assimilate data. (AU)

• FAPESP's process: 01/13816-1 - Brazilian component of the South American low level jet east of the Andes field experiment: interaction in meso and large scale between the Amazon and La Plata River Basins
• Grantee: Jose Antonio Marengo Orsini
• Support Opportunities: Research Projects - Thematic Grants