A tropopause-related climatology of ozone profiles (TpO3 climatology)

A new ozone climatology (TpO3 climatology), based on ozonesonde (1980-2006) and SAGE-II satellite measurements(1984-2005) covers altitudes from the Earth’s surface up to  ~60 km. This climatology is novel in that the ozone profiles are categorized according to calendar month, latitude, and local tropopause heights. It presents ozone mixing ratio profiles in 10° latitude zones on a 1 km pressure altitude grid (z=16 log10(1013/P), P is pressure in hPa), according to the tropopause (or double tropopause) heights. Presentation2The probability distribution of tropopause heights is also provided.

The TpO3 climatology has several benefits compared a sea-level- or tropopause-referenced climatology. In particular:

(i) The dependence of the ozone abundance and its variability on tropopause height is preserved. This allows a more accurate characterization of ozone profiles and a partial characterization of longitudinal variability.

(ii) Variability in the upper troposphere and the lower stratosphere is reduced when compared to sea-level-referenced climatologies.

(iii) Ozone profiles in the presence of double tropopauses are somewhat better characterized.

(iv) The availability of the tropopause height statistics makes it possible to reduce the TpO3 climatology to a more traditional sea-level-referenced or tropopause-referenced climatology.





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In publications using the TpO3 climatology please include the reference to the paper above.


Contact: Viktoria Sofieva(firstname.lastname(at) fmi.fi)


Last updated: 9 January 2014