Tropical Cyclone Applications of GOES-RMark DeMaria and Ray Zehr

NESDIS/ORA, Fort Collins, CO

John KnaffCIRA/CSU, Fort Collins, CO

• Applications of Advanced Feature Track Winds• Tropical Cyclone Intensity Monitoring using the

HES– Estimates of HES resolution requirements using

GOES-8 imager data

• Implications of improved thermodynamic measurements

Estimation of HES Horizontal Resolution Requirements Using GOES-8 Imagery

• Analyze IR brightness temperatures from recent intense Atlantic hurricanes

• Degrade resolution from 4 to 8, 16, 32, 48 km• Determine impact on eye temperature• Surface pressure estimate from HES would require

eye temperature down to ~500 hPa (~0 oC)• Result: HES resolution of 4 km is highly preferred

over 10 km resolution for TC analysis– Similar analysis with MODIS data underway to

eliminate possible diffraction effects on the results

Impact of Horizontal Resolution on GOES-8 Brightness Temperature in the TC Eye (4 km resolution required for some storms)

Hurricane Mitch with 4, 8, 16, 32 km Resolution (GOES-8 Channel 4)

Eye temp vs horizontal resolutionfor 7 recent major hurricanes