Section 63
Chapter 62,169

Four-dimensional variational data assimilation using the adjoint of a multilevel primitive-equation model

Jean-Noéul Thepaut; Philippe Courtier

Quarterly Journal of the Royal Meteorological Society 117(502): 1225-1254


ISSN/ISBN: 0035-9009
DOI: 10.1002/qj.49711750206
Accession: 062168761

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The aim of the paper is to demonstrate the numerical feasibility of 4-D variational assimilation using a multilevel primitive-equation model. The experiments consist in minimizing the distance between the model solution and the observations. The gradient of the cost function thus defined is computed by integrating the adjoint of the model. Here, assimilations are performed using model-generated observations.

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