Inverse estimate of the North Atlantic Circulation:n Influence of the fine resolution GOCINA dynamic topography
Dmitry Sidorenko(1) , Sergey Danilov(1) , and Jens Schroeter(1)
Postfach 12 01 61,
The circulation in the North Atlantic subpolar gyre and the Nordic
seas has been improved by assimilating GOCINA altimetry into inverse
finite-element ocean circulation model. The inverse model
seeks for the density field which minimizes the distance between model and
observations subject to stationary dynamic equations.
A series of model experiments has been conducted to improve the circulation
by including altimetry data. It turned out to be necessary to
add information about the deep ocean circulation to obtain a realistic
solution. We chose to require closeness of the deep pressure gradient
to that of a forward solution.
The work also gives estimates of transports across the Denmark Strait.