 |
| Titel |
Estimating the mean dynamic sea topography by combining so-called complete gravity field models and altimetry |
| VerfasserIn |
Silvia Becker, Wolf-Dieter Schuh, Martin Losch, Grit Freiwald |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250035117
|
|
|
|
|
|
| Zusammenfassung |
| The ocean’s mean dynamic topography is used to improve estimates of the general ocean
circulation. In principle the dynamic topography results from subtracting the geoid height
from the altimetric mean sea surface. However, the data types have different representations
and spatial resolutions. Therefore, it is necessary to develop processing strategies considering
this aspect in estimating the ocean’s mean dynamic topography. On this poster we want to
present the following approach.
We consider the altimetric mean sea surface as a sum of geoid height represented in
terms of spherical harmonics and the mean dynamic topography parameterized
by a finite elements method. So-called complete gravity field models which span
the entire space have recently been designed. The altimetry information and the
complete gravity field model can now be combined in terms of normal equations
resulting in an estimation of the ocean’s mean dynamic topography with a regular
covariance matrix, which can be integrated into stationary ocean models. We will
demonstrate our approach presenting results obtained for the North Atlantic Ocean. |
|
|
|
|
|
|