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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

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

my phd project
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
background why australia
Background – Why Australia?
  • Well…
  • Also:
    • Unique habitat and conditions
    • Few measurements
    • Large Savanna biomass burning region
      • Northern Territory/North Western Australia
existing atmospheric measurements
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
forthcoming
Forthcoming…
  • Global
    • OCO Satellite
  • Other more localised measurements
    • In situ FTIR
oco satellite program overview
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
oco validation measurements 1
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
oco validation measurements 2
OCO – Validation Measurements (2)
  • Major validation – ground-based solar FTS
    • Bruker 125HR (or equivalent)
    • Hi-resolution (0.02cm-1) FTNIR spectra (3500-15798cm-1)
more localised measurements
An OOOFTI in KyabramMore 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)
my phd plan of action
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
modelling 1 test phase
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
where to now
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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