613 Seminar: Adrian Loftus


This presentation will first provide an overview of SMARTLabs ACHIEVE mobile facility and its role in collecting active and passive remote-sensing data for studies of aerosol-cloud-precipitation (ACP) interactions as well as supporting fundamental cloud and precipitation science and exploring radar remote sensing concepts associated with NASA’s planned Aerosol-Clouds-Ecosystem (ACE) mission.

I will present results from the first-ever ground-based cloud radar measurements and accompanying analyses of low-level stratocumulus (Sc) systems in the presence of biomass-burning aerosols over northern Vietnam during the springtime 2013 7-SEAS/BASELInE campaign.  I will also briefly discuss ongoing work involving retrieval of cloud properties from ACHIEVE data in addition to co-located ground-based multi-frequency radar observations of cloud and precipitation systems in support of ACE (as well as Clouds and Precipitation Processes Mission [CaPPM]) science.

The second part of this talk will cover recent advances in simulating cloud and precipitation processes in models for ACP studies and other applications.  The Goddard Cumulus Ensemble (GCE) cloud-resolving model has been enhanced with a triple-moment (3M) bulk microphysics scheme as well as the Regional Atmospheric Modeling System (RAMS) version 6 aerosol module.  Because the aerosol burden not only affects cloud droplet size and number concentration, but also the spectral width of the cloud droplet size distribution, the 3M scheme is well suited to simulate aerosol-cloud-precipitation interactions within a three-dimensional cloud/regional model. Initial results from GCE model simulations of 7-SEAS Sc under various aerosol loadings showcase the abilities of the 3M scheme as well as provide insight into how the impact of aerosols on cloud and precipitation processes in stratocumulus over land may manifest themselves in simulated radar signals.  The additional variability predicted on the hydrometeor distributions with the 3M scheme can provide beneficial input for forward models to link the simulated microphysical processes with observations as well as to assess and further develop retrieval methods.

Seminar Series Coordinators