1. Perspective on previous TCP activities (1983- present) H. B. Singh, NASA Ames Research Center GOAL: Measure, understand, and model composition & chemistry of the global troposphere with emphasis on: –Detailed characterization of atmospheric composition & its perturbations from man-made & biospheric emissions –Ozone pollution –Oxidation capacity of the atmosphere –Biogeochemical cycles (C, N, S) –Radiative properties of gases and aerosols APPROACH: –Develop measurement capabilities & platforms –Acquire observational data via field campaigns

2. VOCs, NO x NO x NMVOCs CONTINENT ≈≈≈≈≈≈≈≈≈ Boundary layer Free Troposphere CONTINENT Atmospheric chemistry & climate (O 3 is primary constituent of smog, O 3 and CH 4 are most important GHGs after CO 2 ) OH HO 2 VOC, CH 4, CO, NO x NO NO 2 h O3O3 O3O3 Hemispheric Pollution Direct Intercontinental Transport greenhouse gases air pollution (smog) Oxidation capacity h O3 surface trend 1974-2002: 0.3 ppb/year Aerosol/radiation O3O3

3. TCP Platforms & Coordination  Inter-comparisons  Coordinated science flights  Sharing of forecasts & data  Joint publications NASA DC-8NSF C-130 NASA J-31 UW Duchess DLR Falcon NASA Be-200 Canadian Cessna DOE-G1

4. Global/regional models Surface High temporal resolution Limited spatial resolution Airborne Detailed speciation/processes Limited in time and space Satellite Global coverage Limited detail Emissions, Meteorology Chem/Phys processes INTEGRATED ATMOSPHERIC STUDIES Science/Decision Support/Policy (From stand alone to multi-partner & multinational experiments)

5. DC-8, J-31 & B-200 INTEX-B Payload Mission Mgr. Console Navigation EQUIPMENT RACK PROBE ICATS DIAL AROTAL LASER SYSTEM DACOM/DLH POP SAFS UNH DCALS UCI PANAK UH/LIA ATHOS NO GT-LIF TD-LIF GTCIMS PAN/OVOC Aerosols HO x, NO NO, NO 2 NO 2 SO 2, HNO 4 Strat O 3 Lidar Peroxides HCHO Actinic flux CO/CH 4 H 2 O HNO 3, Aero. Comp., Hg? O 3 CO 2 H 2 O Trop O 3 /Aerosol Lidar NMHC Halocarbons HCHO SAFS SINGH COHEN HUEY MCGEE HEIKES SHETTER ANDERSON CLARKE DIBB AVERY VAY BARRICK FRIED BROWELL BLAKE BRUNE, HUEY DISKIN SACHSE PODOLSKE FASTOZ MACDONNA PDS TAN J-31: Sun photometer, Solar Flux Radiometer, Cloud Absorption Radiometer, Scanning Polarimeter; B-200: HSRLidar, HySPAR, LAABS, Nadir digital camera

6. Model Forecasts for Flight Planning MET data Trajectories Convective influences Fires AIRS- CO MOPITT- CO MODIS- Aerosol SCIA- NO2 GOES- clouds GEOS-Chem (Harvard) MOZART (NCAR) RAQMS (Langley) STEM (U. Iowa) PNL (Milagro) SAT Tracks Model Forecasts

7. TCP Field Campaigns CITE-series & DICE/Electra, CV-990 & DC-8 (1983, 1986, 1989, 2003) : Instrument inter-comparisons & tests ABLE-series/Electra (1984, 1985, 1987, 1988, 1990): Biospheric- atmospheric exchange over the Amazon rain forest & subarctic TRACE-A/DC-8 (1992): African fires and pollution in the South Atlantic PEM-series & TRACE-P/DC-8 & P-3 (1991, 1994, 1996, 1999, 2001): Exploring composition of the Pacific troposphere & perturbations due to Asian pollution transport SONEX/DC-8/Falcon (1997): Impact of aircraft emissions & convection in the UT/LS INTEX-NA (A & B)/DC-8, B-200, J-31 & partner A/C (2004, 2006): Intercontinental transport of pollution to and from North America and its impact on air quality & climate ARCTAS DC-8/B-200, J-31 & partner A/C (2008?): Arctic Air pollution

8. INTEX-NA/ICARTT/MILAGRO Flight Tracks NASA DC-8 NOAA P3 UK BAe146 DLR Falcon Hawaii Houston Anchorage INTEX-A/ICARTT INTEX-B/MILAGRO Seattle Veracruz C-130 C-130+J-31+B-200 O 3 Trop residual/OMI

9. TerraAquaEnvisat INTEX-NA Targeted Satellite Validation Activities (CO, O 3, HCHO, NO 2, HNO 3, H 2 O, HCN, Aerosol) Aura INTEX-A

10. INTEX-B AIRBORNE ATMOSPHERIC CHEMISTRY MISSIONS (1983-2006) SONEX/POLINAT INTEX-B TCP

11. Platform & partner evolution