A novel tropopause-related climatology of ozone profiles V. F. Sofieva1, J. Tamminen1, E. Kyrölä1, T. Mielonen2,3, P. Veefkind3,4, B. Hassler5,6, and G.E. Bodeker7 1Finnish Meteorological Institute, Helsinki, Finland 2Finnish Meteorological Institute, Kuopio, Finland 3Royal Netherlands Meteorological Institute (KNMI), De Bilt, the Netherlands 4Delft University of Technology, Faculty of Civil Engineering and Geosciences Department of Geoscience and Remote Sensing, Delft, the Netherlands 5CIRES, University of Colorado, Boulder, CO, USA 6NOAA, ESRL, Chemical Sciences Division, Boulder, CO, USA 7Bodeker Scientific, Alexandra, Central Otago, New Zealand
Abstract. A new ozone climatology, based on ozonesonde and satellite measurements,
spanning the altitude region between the earth's surface and ~60 km is
presented (TpO3 climatology). This climatology is novel in
that the ozone profiles are categorized according to calendar month,
latitude and local tropopause heights. Compared to the standard
latitude–month categorization, this presentation improves the
representativeness of the ozone climatology in the upper troposphere and the
lower stratosphere (UTLS). The probability distribution of tropopause
heights in each latitude–month bin provides additional climatological
information and allows transforming/comparing the TpO3 climatology to a
standard climatology of zonal mean ozone profiles. The TpO3 climatology
is based on high-vertical-resolution measurements of ozone
from the satellite-based Stratospheric Aerosol and Gas Experiment II (in
1984 to 2005) and from balloon-borne ozonesondes from 1980 to 2006.
The main benefits of the TpO3 climatology are reduced standard
deviations on climatological ozone profiles in the UTLS, partial
characterization of longitudinal variability, and characterization of ozone
profiles in the presence of double tropopauses.
The first successful application of the TpO3 climatology as a priori in ozone
profile retrievals from Ozone Monitoring Instrument on board the Earth Observing System (EOS) Aura
satellite shows an improvement of ozone precision in UTLS of up to 10%
compared with the use of conventional climatologies.
In addition to being advantageous for use as a priori in satellite retrieval
algorithms, the TpO3 climatology might be also useful for validating
the representation of ozone in climate model simulations.
Citation: Sofieva, V. F., Tamminen, J., Kyrölä, E., Mielonen, T., Veefkind, P., Hassler, B., and Bodeker, G.E.: A novel tropopause-related climatology of ozone profiles, Atmos. Chem. Phys., 14, 283-299, doi:10.5194/acp-14-283-2014, 2014.