 |
| Titel |
Mapping technique of climate fields between GCM's and ice models |
| VerfasserIn |
T. J. Reerink, M. A. Kliphuis, R. S. W. Wal |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1991-959X
|
| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 3, no. 1 ; Nr. 3, no. 1 (2010-01-11), S.13-41 |
| Datensatznummer |
250000793
|
| Publikation (Nr.) |
 copernicus.org/gmd-3-13-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Here, we present a mapping method OBLIMAP, which projects and interpolates
fields like surface temperature, surface mass balance, and surface height
between a geographical based coordinate system of a General Circulation Model
(GCM) and a rectangular based Ice Model (IM). We derive an oblique
stereographic projection and its inverse, which holds for any area at the
Earth's surface, and which can be combined with two different interpolation
methods. The first one is suited to interpolate the projected fields of a
coarse GCM grid on a fine meshed IM grid. The second one is appropriate for
the opposite case. Both grids are allowed to be arbitrary and irregularly
spaced. Therefore the OBLIMAP technique is suitable for any GCM-IM
combination. After a first scan of the GCM grid coordinates and the
specification of the IM grid, fast mapping of various fields is possible. To
and fro (GCM-IM-GCM) mapping tests with the Climate Community System Model
(CCSM) at T42 resolution (~313 km) and the Regional Atmospheric
Climate Model (RACMO) at ~11 km and ~55 km, show average
temperature differences of less than 0.1 K with small standard deviations.
OBLIMAP, available at GMD, is an accurate, robust and well-documented mapping
method for coupling an IM with a GCM or to map state of the art initial and
forcing fields available at geographical coordinates to any local IM grid
with an optimal centered oblique projection. Currently, the oblique
stereographic and the oblique Lambert azimuthal equal-area projections for
both the sphere and the ellipsoid are implemented in OBLIMAP. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|