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FTS Measurements for Constraining the Australian Carbon Cycle

FTS Measurements for Constraining the Australian Carbon Cycle. Nicholas Deutscher 1,2 , Rachel Law 1 , David Griffith 2 and Glenn Bryant 2. Outline:. My PhD Plan. 1 CSIRO Atmospheric Research, Aspendale, Victoria 3195

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FTS Measurements for Constraining the Australian Carbon Cycle

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  1. FTS Measurements for Constraining the Australian Carbon Cycle Nicholas Deutscher1,2, Rachel Law1, David Griffith2 and Glenn Bryant2 Outline: • My PhD Plan 1CSIRO Atmospheric Research, Aspendale, Victoria 3195 2Atmospheric Chemistry Research Group, Department of Chemistry, University of Wollongong, Wollongong, NSW, 2522

  2. My PhD Project Aim: • to better understand the Australian carbon cycle; and • to provide constraints to estimates of Australian carbon fluxes. How? – Using: • FTS atmospheric trace gas measurements; and • Inverse atmospheric modelling

  3. Background – Why Australia? • Well… • Also: • Unique habitat and conditions • Few measurements • Large Savanna biomass burning region • Northern Territory/North Western Australia

  4. Cape Grim Baseline Air Pollution Station Continuous CO2, 13CO2 CH4, CO, N2O Flux Towers Howard Springs Cape Tribulation Burdekin Virginia Park Janina Tumbarumba Maroondah Solar FTIR remote sensing Wollongong In-situ FTIR Aspendale Field campaigns Jenolan Caves Kyabram Tumbarumba Existing atmospheric measurements • Cape Grim Baseline Air Pollution Station • Continuous CO2, 13CO2 • CH4, CO, N2O

  5. Forthcoming… • Global • OCO Satellite • Other more localised measurements • In situ FTIR

  6. OCO Satellite Program Overview • Orbiting Carbon Observatory • US-based (JPL-NASA) • Dedicated global CO2 mapping • 3 parts • Satellite measurements • Ground-based validation measurements • Inverse modelling

  7. OCO – Validation Measurements (1) • Network of ground-based sites • Arrival Heights, Antarctica 78° S upgrade • Lauder, New Zealand 45° S upgrade • Wollongong, Australia 34° S new • Darwin, Australia 12° S new • Mauna Loa 20° N upgrade • Southern Great Plains, OK 36° N upgrade • Harvard Forest 42° N new • Park Falls 46° N new • Bremen 53° N existing • Poker Flat 65° N upgrade • Ny Alesund 79° N existing • Continuous in situ CO2 measurements by instrument traceable to CMDL standard (e.g. Li-Cor infrared analyzer) • Ancillary measurements of cloud, aerosol, radiation, and standard meteorological variables

  8. OCO – Validation Measurements (2) • Major validation – ground-based solar FTS • Bruker 125HR (or equivalent) • Hi-resolution (0.02cm-1) FTNIR spectra (3500-15798cm-1)

  9. An OOOFTI in Kyabram More localised measurements • In-situ FTIR (OOOFTI) • Continuous data • Including night time • Multi-species - CO2, CH4, CO, N2O, 13CO2 • ~0.1% (0.3ppmv) precision CO2 • Co-located with OCO ground validation • Darwin • Lauder (trial currently underway) • Ghan railway (Adelaide to Darwin)

  10. My PhD Plan of action • Inverse modelling (1) • Planned measurements to determine their value • FTS Measurements • Inverse modelling (2) • Incorporate real measurements to determine source estimates

  11. Forward atmospheric transport model (CCAM) Generate synthetic data representative of the planned measurement strategy Time Dependent Inverse (TDI) model Test value of additional measurements in determining sources and uncertainties when added to a standard existing network CO2 only (currently) Background site network CMDL/NOAA flask sites – monthly averaged Continuous Cape Grim synthetic data Additional sites (separately, combined) Darwin Alice Springs Ghan Railway Modelling (1) – Test phase

  12. Uncertainty improvement - Darwin + basic network Modelling Results

  13. Uncertainty improvement - Ghan railway + basic network Ghan railway Darwin Ghan Railway

  14. Uncertainty improvement - Darwin AND Ghan Railway + basic network Darwin & Ghan

  15. Where to now? • Further investigate measurement strategies • Frequency of Ghan measurements • Combinations of sites • Indian-Pacific railway • Multi-species inversions • Use CH4, CO data as well as CO2 • Using column measurements • Measurements • Lauder • Darwin • Ghan railway • Model the measurements • Australian carbon cycle information

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