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Ozone assimilation in the ERA‐40 reanalysis project
Author(s) -
Dethof A.,
Hólm E. V.
Publication year - 2004
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1256/qj.03.196
Subject(s) - ozone , data assimilation , environmental science , meteorology , assimilation (phonology) , atmospheric sciences , climatology , geography , geology , philosophy , linguistics
In this paper we outline the ozone model and analysis system used in the ECMWF 45‐year reanalysis project, and take a first look at the quality of the resulting ozone fields. The analysed ozone, both profiles and total‐column ozone field, generally compares well with independent observations. However, there are certain problematic situations when the profile is not correct even if the analysed total ozone is close to observations. These situations appear when there is a bias between the model and the observations used in the assimilation. Suggestions are made for improvements of the ozone assimilation and modelling, including the introduction of a bias correction scheme for ozone data. Copyright © 2004 Royal Meteorological Society