indian ocean convection seen by the s-polka radar in dynamo
DESCRIPTION
Indian Ocean Convection Seen by the S-PolKa Radar in DYNAMO. R. Houze and D. Hence, S. Brodzik , K. Rasmussen, S.Powell , H. Barnes, B. Dolan, K. Chakravarty , C. Burleyson , Z. Li, S. Ellis, T. Weckwerth , J. Vivekanandan , J. Hubbert , W.-C. Lee. - PowerPoint PPT PresentationTRANSCRIPT
Indian Ocean Convection Seen by the S-PolKa Radar in
DYNAMO
AMS Conf. on Hurricanes and Tropical Meteorology, Ponte Vedra, FL, 19 April 2012
R. Houzeand
D. Hence, S. Brodzik, K. Rasmussen, S.Powell, H. Barnes, B. Dolan, K. Chakravarty, C. Burleyson, Z. Li,
S. Ellis, T. Weckwerth, J. Vivekanandan, J. Hubbert, W.-C. Lee
DYNAMO Radar experiment goal
Characteristics and evolution of the MJO cloud population in the region where the disturbance builds up
Addu Atoll
Clouds in the moist layer
Humidity gradient layers and nonprecipitating clouds
Long lines of cumulus
Cold pool examples seen in differential
reflectivity (ZDR)
Deep precipitating convection
Rain over area scanned by S-PolKa
4 km
8 km
graupel
small icelarge non-melting ice
heavy rain
melting snow
Small cumulonimbus
Moderate cumulonimbus
Doppler velocity
Hydrometeor type graupel
small ice
Largenon-melting ice
heavyrainmelting
ice
5 km
10 km
Broad stratiform region of a mesoscale
system
melting snow
graupel
50 dBZ!
Large mesoscale
system
Stratiform
Convective
Convection feeding into a
large MCSin sheared
environment
Momentum transport
Biggest MCS of first active phase:weak unidirectional shear
Larger than mesoscale organization
Giant Rings of Convection
Westerly Surges
Moist layer• Humidity layers• Cumulus lines and cold pools
Deep convection• Microphysics• Anvil clouds of deep convection• Mesoscale systems• Effects of shear• Larger than mesoscale organization
SUMMARY
EndThis research was sponsored by NSF grants AGS-1059611 and DOE grant
DE-sc0001164/er-64752.