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Shallow cloud structure and organization under suppressed conditions in AMIE/DYNAMO

Shallow cloud structure and organization under suppressed conditions in AMIE/DYNAMO. Angela Rowe and Robert Houze , Jr. University of Washington ASR Science Team Meeting Potomac, MD 13 March 2014. AMIE/DYNAMO. Zuluaga and Houze (2013). S- PolKa.

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Shallow cloud structure and organization under suppressed conditions in AMIE/DYNAMO

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  1. Shallow cloud structure and organization under suppressed conditions in AMIE/DYNAMO Angela Rowe and Robert Houze, Jr. University of Washington ASR Science Team Meeting Potomac, MD 13 March 2014

  2. AMIE/DYNAMO Zuluaga and Houze (2013)

  3. S-PolKa Active periods: Increased rainfall/organization Suppressed periods: Reduced rainfall, shallower convection, dry mid-levels

  4. October Rain Echo-top heights Number cells

  5. 5 October

  6. 5 October Echo tops # cells

  7. 6 October Photo: Bob Houze

  8. 6 October

  9. 10 October 20-30 km diameters

  10. Lima and Wilson (2008) Amazon (TRMM-LBA)

  11. Summary • As near active period, increase rain, deeper echo, more cells • Convection forming along boundary layer features (rolls, cloud lines) produce cold pools during afternoon • New initiation focused along gust front • More numerous and deeper convection when gust fronts intersect • Same for November (December is odd…)

  12. Next steps • Characterize periods and properties of cloud lines (environment, frequency, diurnal cycle, nonprecipitating clouds) • Manually document cold pools (maximum diameter, parent convection characteristics) • Continue to search for times when gust front moves over Gan ARM site and relate to radar data

  13. KAZR

  14. Funded by NSF Grant #AGS-1059611 and DOE Grant #DE-SC0008452 Thank you!

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