HR: 1330h
AN: A52A-0778 [PDF]
TI: Retrieval of Isotopomer-Specific Ozone Vertical Profiles from Solar Infrared Spectra Recorded at
Lauder, New Zealand.
AU: * Haverd, V E
EM: vanessah@uow.edu.au
AF: University of Wollongong, University of Wollongong, Wollongong, NSW 2522
Australia
AU: Jones, N
EM: njones@uow.edu.au
AF: University of Wollongong, University of Wollongong, Wollongong, NSW 2522
Australia
AU: Wood, S
EM: s.wood@niwa.co.nz
AF: Mational Institute of Water and Atmospheric Research Ltd, Private Bag 50061, Omakau, Central Otago,
Omakau, -- 23
New Zealand
AB:
The isotopic composition of atmospheric ozone column over Lauder has been studied by high resolution ground-based solar
Fourier Transform Infrared Spectrometry, with retrievals being performed by the Optimal Estimation Method. Firstly, vertical
profiles for the main isotopomer ($^{16}$O$^{16}$O$^{16}$O) were retrieved in the 1001.3-1004.3 cm-$^{1}$ interval. Five
vertically independent partial columns were obtained and validated against independent microwave radiometer measurements,
balloon sonde data and Dobson spectrophotometer data. Profiles of the minor isotopomers ($^{16}$O$^{16}$O$^{18}$O,
$^{16}$O$^{18}$O$^{16}$O, $^{16}$O$^{16}$O$^{17}$O, $^{16}$O$^{17}$O$^{16}$O) were then retrieved in separate spectral
intervals with three vertically independent partial columns being achieved. For these retrievals, the profile of
$^{16}$O$^{16}$O$^{16}$O was constrained to the previously retrieved profile, which was also used as the a-priori profile for
the target species. Results are compared to previous ground-based, balloon-based and satellite measurements of isotopic
enrichments in atmospheric ozone and found to have smaller uncertainties. The results should therefore provide useful data
for validating proposed mechanisms for the anomalous mass-independent isotopic enrichments in atmospheric ozone.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting