PROJECT OBJECTIVES WE PROPOSE FIELD MEASUREMENTS OF KEY TRACER SPECIES CO2 CH4 N2O CO C2H6 FROM AIRCRAFT GLOBAL HAWK WB57F ER2 DC8 OTHERS AND BY GROUND BASED REMOTE SENSING X CO2 X CH4. OUR SENSORS MATCH OR EXCEED THE HIGHEST PRECISION AVAILABLE ANYWHERE. OUR LEGACY AIRBORNE SENSORS ARE FLEXIBLE AND FLIGHT PROVEN WE PROPOSE TO UPGRADE TO CURRENT TECHNOLOGY RESTORING FORMER NASA CAPABILITY FOR HIGH PRECISION N2O AND CO IN THE STRATOSPHERE AND ADDING C2H6. WE WILL PROVIDE DATA TO ANDCOLLABORATE WITH SCIENCE TEAMS IN MAJOR FIELD INVESTIGATIONS AND APPLY MODELS TO PRODUCE SCIENTIFIC UNDERSTANDING. INSTRUMENTS WE HAVE FOUR LEGACY SENSORS TWO NDIR AIRBORNE BALLOON CO2 SENSORS 1992 1995 AND THE 4 CHANNEL QUANTUM CASCADE LASER SPECTROMETER QCLS 2007 THAT MEASURED CO2 CH4 N2O AND CO ON THE HIAPER POLE TO POLE OBSERVATIONS EXPERIMENT LOGGING 800 HOURS ON THE NCAR G V. OUR NDIR SENSORS PROVIDED RELIABLE ACCURATE MEASUREMENTS ON THE ER 2 WB57F PROTEUS UWYO KING AIR UND CITATION 2 AND OMS BALLOONS. WE ADDED TWO 3 CHANNEL CAVITY RINGDOWN SPECTROMETERS IN 2012 HUPCRDS FOR CO2 CO CH4 ONE FOR NASAS CARBON IN THE ARCTIC VULNERABILITY EXPERIMENT CARVE ON THE C 23 AND A HIGH ALTITUDE VERSION ON THE ER 2 SEAC4RS AND GLOBAL HAWK ATTREX. TWO GROUND BASED BRUKER EM27SUN FOURIER TRANSFORM SPECTROMETERS CAN RESOLVE SMALL SPATIAL GRADIENTS OF TOTAL COLUMN CO2 AND CH 4. WE HAVE A NUMBER OF GROUND BASED IN SITU SENSORS FOR ALL TARGET SPECIES. OUR CALIBRATION FACILITY ENSURES TRACEABILITY TO WORLD STANDARDS. WE USE LAGRANGIAN PARTICLE DISPERSION MODELS AND OTHER MODEL DATA FUSION FRAMEWORKS TO ANALYZE SOURCES AND SINKS OF TRACE GASES.SIGNIFICANCE OUR WORK ADDRESSES THE TOP SCIENTIFIC QUESTIONS FOR NASAS ATMOSPHERIC COMPOSITION FOCUS HOW IS ATMOSPHERIC COMPOSITION CHANGING? HOW DOES ATMOSPHERIC COMPOSITION RESPOND TO AND INFLUENCE GLOBAL ENVIRONMENTAL CHANGE INCLUDING TROPOSPHERIC AND STRATOSPHERIC OZONE CLIMATE AND GLOBAL AIR QUALITY? WHAT PROCESSES AND SOURCE TYPES DRIVE METHANE EMISSIONS AND GLOBAL TRENDS? WHAT ARE THE EFFECTS OF GLOBAL ATMOSPHERIC CHEMICAL AND CLIMATE CHANGES INCLUDING ENERGY RELATED AND AGRICULTURALEMISSIONS ON REGIONAL AND GLOBAL OZONE CONCENTRATIONS AND AIR QUALITY?SCIENCE PRODUCTS HIGH ACCURACY IN SITU DATA FOR CO CH4 N2O AND CO2 WILL BE MEASURED GLOBALLY IN THE ATMOSPHERIC TOMOGRAPHY EXPERIMENT ATOM A NASA EVS 2 PROJECT LEAD PI S. WOFSY AND FUTURE MISSIONS TO A DETERMINE EMISSIONS AND RATES OF TRANSPORT AND CHEMICAL TRANSFORMATION FOR CH4 O3 POLLUTION PRECURSORS AND POLLUTANTS FROM MAJOR REGIONS OF THE GLOBE B CALIBRATE AND VALIDATE OCO 2 AND 3 GOSAT TROPOMI AND OTHER SATELLITES PLUS THE TCCON AND NDAAC GROUND BASED REMOTE SENSING NETWORKS AND C DETERMINE TRANSPORT RATES ENTERING TRANSITING AND EXITING THE UPPER TROPOSPHERE LOWER STRATOSPHERE AND TROPICALTROPOPAUSE LAYER UT LS TTL. ANALYSIS OF IN SITU TRACERS TO DETERMINE SPATIALLY AND TEMPORALLY RESOLVED FLUXES OF CH4 CO2 AND OTHER SPECIES AND TO DIAGNOSE UNDERLYING PROCESSES. ANALYSIS OF IN SITU TRACERS TO DETERMINE THE SOURCE LOCATIONS FOR AIR IN THE TTL AND LS OR IN THE FAR REACHES OF THE GLOBAL TROPOSPHERE AND TO DIAGNOSE TRANSPORT RATES AND PATHWAYS FOR REACTIVE SPECIES POLLUTANTS BLACK CARBON ETC. BY MAINTAINING TIGHT LINKS TO WMOSTANDARDS WE CAN DISTINGUISH AIR ORIGINATING FROM DIVERSE LOCATIONS: LAND OR SEA; TROPICAL MIDLATITUDE OR BOREAL AND BOUNDARY LAYER UPPER TROPOSPHERE OR STRATOSPHERE.AS MEMBERS OF SCIENCE TEAMS ASSEMBLED FOR NASA SPONSORED MISSIONS OUR GROUP CONTRIBUTES COMPREHENSIVE ACCURATE RELIABLE TRACER DATA AND SCIENTIFIC ANALYSIS BY THE ENTIRE TEAM. WE CURRENTLY OR RECENTLY PARTICIPATED IN THESE NASA SCIENCE TEAMS USING OUR INSTRUMENTATION AND APPLYING OUR MODEL FRAMEWORKS CARBON MONITORING SYSTEM INTERDISCIPLINARY SCIENCE OCO 2 CARVE SEAC4RS ATTREX ABOVE TCCON.