A four-dimensional inversion of the acoustic tomography, satellite altimetry and in situ data using Quasigeostrophic constraints

Autor: Konstantin V. Lebedev, Dmitri A. Nechaev, Max Yaremchuk
Rok vydání: 2004
Předmět:
Zdroj: Inverse Problems in Science and Engineering. 12:409-431
ISSN: 1741-5985
1741-5977
Popis: A least square dynamically constrained inversion algorithm (DCIA) is developed for monitoring open ocean eddies in the regions, where open boundaries are the major sources of model forecast uncertainties on time scales larger than one week. We employ a finite-difference quasigeostrophic numerical model to constrain evolution of the ocean state. The inversion algorithm is based upon minimization of a quadratic cost function in the space of initial and boundary conditions for quasigeostrophic equations. The problem is regularized by enforcing smoothness in the fields of vorticity, buoyancy, and vertical velocity. We demonstrate that quasigeostrophic currents in an open ocean 1000 × 1000 km region can be effectively reconstructed using acoustic tomography and satellite altimetry data supported by additional sources of information. Performance of the algorithm is tested in the framework of twin-data experiments and then applied to the real observations. The analyzed observations span over the period of two mo...
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje