AT LEAST TWO MAJOR ASPECTS OF OCEAN MIXING SHOULD BE REVISITED IN THE CONTEXT OF NEW HIGH-RESOLUTION ESTIMATES OF AIR-SEA HEAT FLUXES AS WELL AS EDDY RESOLVING CLIMATE MODELS. FIRSTLY THE RECENT FINDING THAT AIR-SEA FLUXES AT SMALL SCALES ARE UNAMBIGUOUSLY DRIVEN BY THE OCEAN IN THE MIDLATITUDES (KIRTMAN ET AL. 2012 BISHOP ET AL. 2017) HAS IMPLICATIONS FOR GLOBAL OCEAN DISSIPATION AND ENERGY BALANCES. THE GENERATION AND DISSIPATION OF ENERGY IN THE ATMOSPHERE AND ALSO THE OCEAN IS OFTEN THOUGHT OF IN TERMS OF A LORENZ ENERGY CYCLE BETWEEN MEAN AND EDDY KINETIC AND POTENTIAL ENERGY. FOR THE EDDY POTENTIAL ENERGY EQUATION THE MAIN BALANCE IS BETWEEN THE BAROCLINIC CONVERSION FROM MEAN TO EDDY POTENTIAL ENERGY (EPE) CONVERSION FROM EPE TO EDDY KINETIC ENERGY DISSIPATION THROUGH INTERIOR MIXING AND THE COVARIANCE OF OCEAN SURFACE DENSITY WITH THE AIR-SEA FLUX OF DENSITY (VON STORCH ET AL. 2012 MA ET AL. 2016). BISHOP ET AL. 2017 HAVE SHOWN THAT ON SMALL SCALES THE AIR-SEA HEAT FLUX TERM ACTS AS A DAMPING OF OCEAN TEMPERATURE ANOMALIES IN MIDLATITUDES WHEREAS ON LARGE SCALES IT CAN EITHER ACT TO GENERATE EPE OR HAVE NEGLIGIBLE EFFECT. IN PARTICULAR IN EDDYING REGIONS SUCH AS THE GULF STREAM AND KUROSHIO EXTENSION REGIONS THERE IS A STRONG DAMPING (BISHOP ET AL 2017). THIS IS SEEN IN STATE OF THE ART FLUX PRODUCTS AND HIGH-RESOLUTION CLIMATE MODELS BUT NOT IN STANDARD RESOLUTION CLIMATE MODELS. SECONDLY NEW ESTIMATES OF THE NET AIR-SEA HEAT FLUX SHOW DISTINCTLY ENHANCED AIR-SEA HEAT LOSS ON THE EQUATORWARD SIDE OF OCEAN FRONTS INCLUDING THE GULF STREAM KUROSHIO EXTENSION AND THE ANTARCTIC CIRCUMPOLAR CURRENT (TRENBERTH AND FASULLO 2017). ALTHOUGH THE N. HEMISPHERE WESTERN BOUNDARY CURRENTS HAVE LONG BEEN KNOWN TO BE A MAJOR SITE OF HEAT LOSS ESPECIALLY IN WINTER THE SITUATION IN THE S. OCEAN HAS BEEN UNCLEAR DUE TO LIMITED DATA. WINTERTIME AIR-SEA HEAT LOSS AND CONVECTION IN THE ABOVE REGIONS IS A MAJOR DRIVER OF DEEP MIXED LAYERS AND FORMATION OF HOMOGENEOUS WATER MASSES KNOWN AS MODE WATERS (HANAWA AND TALLEY 2001). MOST STANDARD-RESOLUTION CLIMATE MODELS HAVE DIFFICULTY IN GETTING DEEP MIXED LAYERS AND REASONABLE AMOUNTS OF MODE WATER FORMATION IN THE S. OCEAN (SALLEE ET AL 2013). WE HYPOTHESIZE THAT THIS IS PARTLY DUE TO INSUFFICIENT AIR-SEA HEAT LOSS AT FRONTS EITHER IN TRANSIENT FEATURES SUCH AS EDDIES OR IN THE TIME-MEAN FRONTAL STRUCTURE. TO ADDRESS THESE ISSUES OF OCEAN MIXING WE WILL USE NEW DATASETS OF AIR-SEA HEAT AND FRESHWATER FLUX SEA SURFACE TEMPERATURE (SST) AND SEA SURFACE SALINITY (SSS) TO: I) DETERMINE THE SCALE-DEPENDENCE OF GLOBAL EPE DISSIPATION.II) DETERMINE THE SCALE-DEPENDENCE OF WATERMASS TRANSFORMATION. EACH OF THESE EFFORTS WILL ADDITIONALLY BE SUPPORTED BY HIGH-RESOLUTION CLIMATE MODELS.