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**Harvard**

El Amraoui, L., Ricaud, P., Urban, J., Théodore, A., Hauchecorne, N., Lautié, N., De La Noë, J., Guirlet, E., Le Flochmoën, N., Murtagh, D., Dupuy, E., Frisk, U. och d'Andon, O. (2004) *Assimilation of Odin/SMR and O<sub>3</sub> and N<sub>2</sub>O Measurements in a Three-dimensional Chemistry Transport Model*.

** BibTeX **

@article{

El Amraoui2004,

author={El Amraoui, L. and Ricaud, P. and Urban, Joachim and Théodore, A. and Hauchecorne, N. and Lautié, Nicolas and De La Noë, J. and Guirlet, E. and Le Flochmoën, N. and Murtagh, Donal P. and Dupuy, E. and Frisk, U. and d'Andon, O.F.},

title={Assimilation of Odin/SMR and O<sub>3</sub> and N<sub>2</sub>O Measurements in a Three-dimensional Chemistry Transport Model},

journal={Journal of Geophysical Research - Atmospheres},

issn={0148-0227},

volume={109},

issue={D22},

abstract={A method for assimilating observations of long-lived species such as ozone (O-3) and nitrous oxide (N2O) in a three-dimensional chemistry transport model (3D-CTM) is described. The model is forced by the temperature and wind analyses from the European Centre for Medium-Range Weather Forecasts (ECMWF). The O-3 and N2O fields used in this study are obtained from the Sub-Millimeter Radiometer (SMR) aboard the Odin satellite. The assimilation technique used is the sequential statistical interpolation approach. The parametrization of the error covariance matrix of the model forecast field is described. A sensitivity study of the system parameters is done in terms of the OMF (observation minus forecast) vector also called "innovation'' vector and in terms of the chi(2) (chi-square) test. The effect of the correlation distances is critical for the assimilated field. The RMS ( root mean square) of the OMF for the correlation distances is minimal for values of 1500 km in the meridional direction and 500 km in the zonal direction for both O-3 and N2O. The treatment of the meridional distance as a function of latitude does not reveal an important improvement. The chi(2) diagnostic shows that the asymptotic value of the model error ( the model error of saturation) is optimal for the value of 12.5% for O-3 and 18% for N2O. We demonstrate the applicability of the developed assimilation method for the Odin/SMR data. We also present first results of the assimilation of Odin/SMR ozone and nitrous oxide for the period from 22 December 2001 to 17 January 2002.},

year={2004},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 4022

A1 El Amraoui, L.

A1 Ricaud, P.

A1 Urban, Joachim

A1 Théodore, A.

A1 Hauchecorne, N.

A1 Lautié, Nicolas

A1 De La Noë, J.

A1 Guirlet, E.

A1 Le Flochmoën, N.

A1 Murtagh, Donal P.

A1 Dupuy, E.

A1 Frisk, U.

A1 d'Andon, O.F.

T1 Assimilation of Odin/SMR and O<sub>3</sub> and N<sub>2</sub>O Measurements in a Three-dimensional Chemistry Transport Model

YR 2004

JF Journal of Geophysical Research - Atmospheres

SN 0148-0227

VO 109

IS D22

AB A method for assimilating observations of long-lived species such as ozone (O-3) and nitrous oxide (N2O) in a three-dimensional chemistry transport model (3D-CTM) is described. The model is forced by the temperature and wind analyses from the European Centre for Medium-Range Weather Forecasts (ECMWF). The O-3 and N2O fields used in this study are obtained from the Sub-Millimeter Radiometer (SMR) aboard the Odin satellite. The assimilation technique used is the sequential statistical interpolation approach. The parametrization of the error covariance matrix of the model forecast field is described. A sensitivity study of the system parameters is done in terms of the OMF (observation minus forecast) vector also called "innovation'' vector and in terms of the chi(2) (chi-square) test. The effect of the correlation distances is critical for the assimilated field. The RMS ( root mean square) of the OMF for the correlation distances is minimal for values of 1500 km in the meridional direction and 500 km in the zonal direction for both O-3 and N2O. The treatment of the meridional distance as a function of latitude does not reveal an important improvement. The chi(2) diagnostic shows that the asymptotic value of the model error ( the model error of saturation) is optimal for the value of 12.5% for O-3 and 18% for N2O. We demonstrate the applicability of the developed assimilation method for the Odin/SMR data. We also present first results of the assimilation of Odin/SMR ozone and nitrous oxide for the period from 22 December 2001 to 17 January 2002.

LA eng

DO 10.1029/2004JD004796

LK http://dx.doi.org/10.1029/2004JD004796

OL 30