PERMAFROST CARBON SOILS HOLD VAST AMOUNTS OF GLOBALLY-IMPORTANT CARBON (1700 PG) WHOSE FATE IN A WARMING CLIMATE REMAINS UNCERTAIN. BY 2200 THAWING SOILS MAY RELEASE 190 64PG OF CARBON MOBILIZING A VAST POOL OF CARBON AND TRIGGERING COMPLEX ECOSYSTEM CHANGE. AQUATIC SYSTEMS ARE HYPOTHESIZED TO PLAY AN ACTIVE AND SIGNIFICANT ROLE IN ARCTIC C CYCLING BY PRODUCING MINERALIZING STORING AND TRANSFORMING CARBON. THIS RESEARCH IS MOTIVATED TO QUANTIFY WHERE WHEN AND HOW ARTIC AND BOREAL CARBON CYCLING IS CHANGING IN RESPONSE TO ONGOING CLIMATIC CHANGES. TO ANSWER THIS QUESTION THE HIGH RESOLUTION LANDSAT 8 OLI SENSOR WILL BE USED TO MAP AQUATIC C DYNAMICS OF PERMAFROST WATERBODIES USING BIO-OPTICAL RETRIEVAL MODELS. THE FIRST STEP TO ACHIEVE THIS GOAL IS TO CONDUCT STANDARDIZED INTERCOMPARISONS BETWEEN ATMOSPHERIC CORRECTION METHODS. RESULTING REFLECTANCE PRODUCTS WILL BE USED IN COMBINATION WITH FIELD BASED-MEASUREMENTS TO DEVELOP BIO-OPTICAL MODELS FOR THREE KEY OPTICAL COMPONENTS: CHLOROPHYLL-A TURBIDITY AND COLORED DISSOLVED ORGANIC CARBON (CDOM). THIS TECHNICAL APPROACH BLENDS CLOUD-BASED DATA FUSION TECHNIQUES WITH GROUNDBASED AIRBORNE AND REMOTE SENSING OBSERVATIONS IN ORDER TO PRODUCE SPATIALLY-EXPLICIT CROSS-SCALE ESTIMATES OF CARBON FRACTIONS FROM CIRCUMPOLAR WATER BODIES. HIGH FIDELITY RETRIEVALS OF CHLOROPHYLL-A TURBIDITY AND COLORED DISSOLVED ORGANIC MATTER WILL PROVIDE AN INDEPENDENT EVALUATION OF LAKE PRODUCTIVITY TRENDS ESPECIALLY CRUCIAL FOR UNDERSTANDING THE ROLE LAKES PLAY IN CYCLING CARBON ACROSS THE CIRCUMPOLAR LANDSCAPE.