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Field FTIR Measurements

Continuous Sampling

Open Path FTIR

Stable Isotopes

Solar IR Remote Sensing

Solar UV-B

Aerosol Optics

Chemical Transport Modeling

Field Based measurements of trace gas fluxes

Why?

"Greenhouse" Gases like CO2, N2O (nitrous oxide) and methane are emitted from a range of soils and water. If control their build-up in the atmosphere we need to know where they come from, and what controls their emission strengths.

Where?

We have studied emissions from a variety of sites, including

    • Agriculture (Maize, wheat, cows, sheep and sugar cane (see picture on right))

    • Forestry

    • Waste water treatment

    • Cave systems

Chambers at the Tweed

 How?

These experiments have involved a range of measurement methods based around the use of FTIR spectrometer as the detector. As the nature of the sources varies, different measurement strategies are required, including

    • Continuous sampling (incl. Chamber and vertical profile measurements)

    • Open path

FTIR in the field

What?

The primary method molecules measured have been H2O, CO2, N2O CO and CH4. In the field we have also measured the isotopic variants of water (HDO versus H2O) and 13C in CO2. By collecting air samples, we have measured the variations 15N in N2O (in particular the positional dependence 15N14NO versus 14N15NO.

  Last reviewed: 16 August, 2007 
 
University of Wollongong
Wollongong NSW 2522 Australia
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