The MJO Precipitating Cloud Population over the Central Indian Ocean as seen by the TRMM PR Hannah C. Barnes Robert A. Houze, Jr. University of Washington.

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Presentation transcript:

The MJO Precipitating Cloud Population over the Central Indian Ocean as seen by the TRMM PR Hannah C. Barnes Robert A. Houze, Jr. University of Washington MJO Field Data and Science Workshop 5 March 2013, Hapuna Beach Resort, Kohala Coast, Hawaii

Precipitating Cloud Population By Phase Isolated, Shallow EchoesDeep Convective CoresBroad Stratiform Regions Active Suppressed

Relationship Between Precipitating Cloud Population and Large-Scale Conditions Pre-ActiveActivePost-Active Phase1234 DCCPeakDecrease WCC, BSRIncreasePeakDecrease Mid-Level Relative Humidity Sharp Increase Slower Increase PeakDecrease hPa Shear IncreasePeak hPa Shear IncreasePeak

Large-Scale Conditions Solid lines = active, dashed = suppressed Relative Humidity (%) Pressure (hPa) Zonal Wind (ms -1 )

MJO Phase Large-Scale hPa Shear ms -1 Frequency (%) ISE DCC WCC BSR Shading = shear magnitude Number

MJO Phase Large-Scale hPa Shear ms -1 Frequency (%) ISE DCC WCC BSR Shading = shear magnitude

Acknowledgements Funding DOE DE-SC / ER and DE-SC DYNAMO – NSF AGS PMM-NASA Grant NNX10AH70G