Journal article

A new Dobson Umkehr ozone profile retrieval method optimising information content and resolution

K Stone, MB Tully, SK Rhodes, R Schofield

Atmospheric Measurement Techniques | European Geosciences Union | Published : 2015

Abstract

The standard Dobson Umkehr methodology to retrieve coarse-resolution ozone profiles used by the National Oceanographic and Atmospheric Administration uses designated solar zenith angles (SZAs). However, some information may be lost if measurements lie outside the designated SZA range (between 60° and 90°), or do not conform to the fitting technique. Also, while Umkehr measurements can be taken using multiple wavelength pairs (A, C and D), past retrieval methods have focused on a single pair (C). Here we present an Umkehr inversion method that uses measurements at all SZAs (termed operational) and all wavelength pairs. (Although, we caution direct comparison to other algorithms.) Information ..

View full abstract

University of Melbourne Researchers

Grants

Awarded by Australian Research Council's Centre of Excellence for Climate System Science


Awarded by Australian Government's Australian Antarctic Science Grant Program


Awarded by Commonwealth Department of the Environment


Funding Acknowledgements

This work was supported through funding by the Australian Research Council's Centre of Excellence for Climate System Science (CE110001028), the Australian Bureau of Meteorology, the Australian Government's Australian Antarctic Science Grant Program (FoRCES 4012), and the Commonwealth Department of the Environment (grant 2011/16853). The authors wish to thank all current and past observers at the Bureau of Meteorology and, previously, CSIRO, for taking the Umkehr observations on which this work is based. The authors are also grateful to S. Jacobs (Monash University) for the digitisation of the historical Melbourne Umkehr data.