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SEAC4RS cloud-radiation- UTLS flight

This research focuses on cirrus clouds, investigating their microphysical composition, including ice water content and habit, along with vertical structure and radiative properties. We aim to enhance our fundamental understanding and improve models and remote sensing capabilities related to radiation's role in cirrus maintenance. The study also examines the impact of pollution in clean and polluted environments, the effects on satellite aerosol retrievals, and related cloud types like aged cirrus and stratiform anvils. We will incorporate data from past aerosol missions to support our findings.

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SEAC4RS cloud-radiation- UTLS flight

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  1. Science goals involving clouds&radiation: • CirrusMicrophysical Composition (IWC, Ni(r), habit) and structure, especially vertical structure, and associated radiative properties => improve basic knowledge (models) and remote sensing capabilities, role of radiation in maintaining Ci • Role of pollution on Ci: outflow data sets in clean and polluted environments • Minor: Effect of Ci on satellite aerosol retrievals • Clout types of interest: Aged and fresh cirrus/anvils, Deep stratiform anvils , TTL/laminar cirrus • Selected Aug. 28, 2011 • Aerosol effects on clouds • Cloud types of interest: shallow to moderate depth cumulus clouds during aerosol missions • Combine with aerosol mission SEAC4RS cloud-radiation-UTLS flight

  2. Altitude of uppermost clouds SEA region Altitude of uppermost cloud layer likely between 12-18km

  3. Thickness of uppermost clouds SEA region 12 – 18 km height Cloud uppermost layer thickness likely ~ 2km

  4. COD of uppermost clouds SEA region 12 – 18 km height Cloud uppermost COD mostly under 0.3

  5. Statistics for August Clouds, 2006-2010 SEA region all heights SEA region 12-18km

  6. Frequency of cloud occurrence SEA region 12 – 18 km height 100% cloudy (Dark red) No CALIOP data (white) Clear air and/or aerosol (Dark blue) August

  7. August 28, 2011

  8. Some thoughts: Get pilot buy-in early Use aircraft as scout? Do radiation (incl. intercomp. first, then microphysics Flux divergence over land VERY difficult

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