Evaluating short-range forecast impact of temperature retrievals in theCPTEC/INPELETKF

摘要

The Center for Weather Forecast and Climate Studies from the BrazilianNational Institute for Space Research (CPTEC/INPE) through itsGroup on Data Assimilation Developments (GDAD) is evaluating theobservation impacts in the Local Ensemble Transform Kalman Filter(LETKF) that is on the way to complete development and testing atthat center. Since 2011 an ensemble-based approach, following Liu andKalnay (2008; QJRMS, 134, 1327-1355), for observation impact evaluationhas been added to the CPTEC/INPE LETKF data assimilationsystem. Currently this capability only applies for conventional observationssince the use of radiances within the LETKF framework is awork on the way. Thus the purpose of this presentation is to evaluatethe short range forecasts impact of in situ and remote sensing observationscurrently available at CPTEC/INPE LETKF in the presence oftemperature retrievals.