Inferencia de perfis verticais de temperatura utilizando uma tecnica interativa implicita de inversao / Retrieval of vertical temperature profiles in the atmosphere using an interative implicit inversion technique

AUTOR(ES)

Joao Carlos Carvalho

DATA DE PUBLICAÇÃO

1998

RESUMO

In this work, we present an iterative implicit inversion method (MIII) to retrieve vertical temperature profiles based on the mathematical inversion of the radiative transfer equation (RTE). The inverse problem is formulated as a nonlinear constrained optimization problem. A regularization term is added to the objective function with the help of a Lagrange multiplier. The regularization function considered is the Tikhonov regularization, and regularization based on the maximum entropy principle. As a first step, it is presented a set of simulations using synthetically data obtained directly from the RTE, then, the method is applied in a real situation with radiance data given by the HIRS/2 (Hight Resolution Infrared Radiation Sounder) sensors. Finally, a comparison with profiles obtained by radiosonde is presented. In general, the proposed algorithm converges to excellent temperature profiles mainly in the tropopause inversion region.

ASSUNTO(S)

temperatura atmosferica problemas inversos sondagem atmosferica perfis de temperatura regulamentacao por maxima entropia transferencia radiativa

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