BASED ON RECENT MODELING DISSOLVED NITROGEN APPEARS TO SIGNIFICANTLY REDUCE THE EVAPORATION RATE OF LIQUID METHANE ON THE SURFACE OF TITAN. WE HAVE DEVELOPED A NEW METHOD FOR CALCULATING THE EVAPORATION RATE OF LIQUID METHANE SATURATED WITH NITROGEN UNDER TITAN S 1.5 BAR ATMOSPHERE. THE NEWLY DERIVED EVAPORATION RATES WERE COMPARED TO EVAPORATION RATES CALCULATED FOR PURE METHANE AS A FUNCTION OF BOTH TEMPERATURE AND RELATIVE HUMIDITY. WE FIND THAT THE PURE METHANE ASSUMPTION SIGNIFICANTLY OVERESTIMATES THE METHANE EVAPORATION RATE FROM SURFACE POOLS ON TITAN. FOR EXAMPLE AT 94 K AND 60% HUMIDITY THE PURE METHANE ASSUMPTION OVERESTIMATES THE METHANE EVAPORATION RATE BY MORE THAN 40%. THIS PREVIOUS OVERESTIMATION OF EVAPORATION RATES LIKELY HAS A PROFOUND IMPACT ON PREVIOUS INTERPRETATIONS OF CASSINI VIMS OBSERVATIONS OF TITAN S SURFACE AND OF CLOUDS IN TITAN S ATMOSPHERE. FOR EXAMPLE RECENT OBSERVATIONS OF NORTHERN SUMMER CLOUDS IN TITAN S TROPOSPHERE HAVE BEEN SPARSER AND LESS FREQUENT THAN PREDICTED BY GENERAL CIRCULATION MODELS (GCMS). AN OVERESTIMATION OF METHANE EVAPORATION FROM TITAN S LAKES AND SEAS COULD EXPLAIN THIS DISCREPANCY BETWEEN OBSERVATIONS AND EXISTING PREDICTIONS. THE SEASONAL EVOLUTION OF THE METHANE AND ETHANE SEAS DEPEND ON NOT JUST THE EVAPORATION OF METHANE SATURATED WITH NITROGEN BUT ALSO ON THE EVAPORATIVE PROCESSES ASSOCIATED WITH NITROGEN-METHANE-ETHANE MIXTURES. WE PROPOSE TO MODEL THE EVAPORATIVE PROCESSES OF BINARY MIXTURES OF NITROGEN-METHANE AND TERNARY MIXTURES OF NITROGEN-METHANEETHANE AND TO THEN INCORPORATE THESE RESULTS INTO A GENERAL CIRCULATION MODEL (GCM) OF TITAN. WE WILL COMPARE THE GCM PREDICTIONS OF CLOUD FORMATION DERIVED USING THE NEW EVAPORATIVE RELATIONSHIPS TO CASSINI VIMS OBSERVATIONS OF CLOUDS (E.G. BROWN ET AL. 2009 AP.J 706; RODRIGUEZ ET AL. 2011 ICARUS 216; TURTLE ET AL. 2011 GRL 38). OUR PROPOSAL IS RELEVANT TO THE CDAP PROGRAM. IN PARTICULAR CDAP SOLICITS RESEARCH PROPOSALS TO CONDUCT SCIENTIFIC INVESTIGATIONS UTILIZING OR ENHANCING THE UTILIZATION OF DATA OBTAINED BY THE CASSINI MISSION. TASKS RESPONSIVE TO THIS CALL INCLUDE . . . 3) NONDATAANALYSIS TASKS THAT SIGNIFICANTLY ENHANCE THE USE OR FACILITATE THE INTERPRETATION OF MISSION DATA. OUR INVESTIGATION WILL ENHANCE THE USE OF CASSINI DATA AND FACILITATE THE INTERPRETATION OF CASSINI DATA. SPECIFICALLY OUR INVESTIGATION WILL PROVIDE NEW INSIGHT INTO CASSINI VIMS OBSERVATIONS OF TROPOSPHERIC CLOUDS. WE WILL IMPROVE THE INTERPRETATION OF THIS DATA THROUGH THE USE OF NEW STATE-OF-THE-ART MODELING OF THE EVAPORATIVE PHYSICS OF BINARY AND TERNARY MIXTURES IN THE LAKES/SEAS AND ON THE SURFACE OF TITAN. BECAUSE OUR PROPOSED WORK INCLUDES THE REINTERPRETATION OF CASSINI VIMS OBSERVATIONS AND IS SO CLOSELY TIED TO AND CONSTRAINED BY CASSINI OBSERVATIONS IT IS NOT WITHIN THE SCOPE OF OTHER NASA PROGRAMS INCLUDING SOLAR SYSTEM WORKINGS OR EMERGING WORLDS.