- TOTAOT maximum in eye of hurricane - New AIRS data source prelim eval - HIRS spike in cost function - Earl in EC, NCEP, G5, G5NCEP in 72 hr fcst by ACONATY.

- TOTAOT maximum in eye of hurricane - New AIRS data source prelim eval - HIRS spike in cost function - Earl in EC, NCEP, G5, G5NCEP in 72 hr fcst

by ACONATY from 20100903

TOTAOT maximum in eye of hurricane

• Combination of low pressure, taller column, and sea salt aerosol are expected as the cause for this maxima in Total Aerosol Optical Thickness. (paraphrasing Arlindo da Silva and Pete Colarco comments on these plots)

New AIRS data source prelim eval

• Preliminary examination shows that the new source for AIRS data is giving us reasonable AIRS data.

• Number of OBS is slightly larger in new data source

HIRS spike in cost function

• METOP-IASI instrument is undergoing decontamination from 20100830 to 20100904. This loss of IASI data results in change of “sig O” for HIRS instruments with similar orbit swaths. Increase in cost function is a response to removal of IASI data. (paraphrasing Will McCarty)

Earl in EC, NCEP, G5, G5NCEP in 72 hr fcst

• ECMWF, NCEP GFS, GEOS5 (5_4_1), G5NCEP(5_4_1)

• G5NCEP central SLP contour is 976 hPa• GEOS-5 central SLP contour is 996 hPa

G5NCEP

G5NCEPNCEPGFS

ECMWF E540FP