CO-I GREG MCFARQUHAR OF THE UNIVERSITY OF OKLAHOMA WILL CONTRIBUTE TO THE ORACLES SCIENCE OBJECTIVES AS DESCRIBED IN THE MAIN ORACLES PROPOSAL SERVING AS CONSULTANT TO THE PI ON MEASUREMENT OF CLOUD PROPERTIES. MORE SPECIFICALLY HE WILL PROVIDE SUPPORT AS DESCRIBED BELOW. ALONG WITH COLLABORATORS AT THE UNIVERSITY OF NORTH DAKOTA THE PI WILL BE RESPONSIBLE FOR THE ACQUISITION AND PROCESSING OF DATA FROM THE CLOUD MICROPHYSICS PROBES (PCASP 2DS CDP CAPS (CAS AND CIP) HVPS3 KING PROBE) AND WILL BE RESPONSIBLE FOR DELIVERING L2 DATA PRODUCTS TO THE SDS. THE PI WILL ALSO PRODUCE A BEST ESTIMATE OF SIZE DISTRIBUTIONS CHARACTERIZING THE COMPLETE RANGE OF PARTICLE SIZES AND OF BULK PROPERTIES (E.G. LIQUID WATER CONTENT TOTAL NUMBER CONCENTRATION CONCENTRATION OF DRIZZLE DROPS EXTINCTION AND EFFECTIVE RADIUS) BY INTERCOMPARING SIZE DISTRIBUTIONS FROM DIFFERENT PROBES AS A FUNCTION OF CLOUD ENVIRONMENTAL AND AIRCRAFT PARAMETERS AND BY CONDUCTING CLOSURE TESTS WHERE MEASURED BULK PROPERTIES ARE COMPARED AGAINST THOSE DERIVED FROM THE SIZE-RESOLVED PROBES. THE PI WILL ALSO USE THE COLLECTED DATA IN STUDIES ADDRESSING THE SCIENTIFIC OBJECTIVES DESCRIBED IN THE PROPOSAL. IN PARTICULAR THE PI WILL ASSESS HOW THE VERTICAL PROFILES OF CLOUD MICROPHYSICAL PROPERTIES AND PRESENCE OF DRIZZLE VARY WITH AEROSOL LOADING AND COMPOSITION METEOROLOGICAL CONDITIONS VERTICAL VELOCITY ALTITUDE DISTANCE FROM THE AFRICAN COAST AND SEPARATION BETWEEN THE CLOUD AND AEROSOL LAYER. BY DOING SO THE PI WILL INVESTIGATE HOW THE ROLE OF PROCESSES SUCH AS ENTRAINMENT AND MIXING COLLISION-COALESCENCE AND HYDROMETEOR SEDIMENTATION DEPEND ON THE COMPOSITION SIZES AND NUMBERS OF AEROSOLS ENTERING THE CLOUD.