 |
| Titel |
Climatic Conditions for modelling the Northern Hemisphere ice sheets throughout the ice age cycle |
| VerfasserIn |
A. Abe-Ouchi, T. Segawa, F. Saito |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 3, no. 3 ; Nr. 3, no. 3 (2007-07-19), S.423-438 |
| Datensatznummer |
250001071
|
| Publikation (Nr.) |
 copernicus.org/cp-3-423-2007.pdf |
|
|
|
|
|
| Zusammenfassung |
| The ice sheet-climate interaction as well as the climatic response to
orbital parameters and atmospheric CO2 concentration are examined in
order to drive an ice sheet model throughout an ice age cycle. Feedback
processes between ice sheet and atmosphere are analyzed by numerical
experiments using a high resolution General Circulation Model (GCM)
under different conditions at the Last Glacial Maximum. Among the proposed
processes, the ice albedo feedback, the elevation-mass balance feedback
and the desertification effect over the ice sheet were found to be the
dominant processes for the ice-sheet mass balance.
For the elevation-mass balance feedback, the temperature
lapse rate over the ice sheet is proposed to be weaker than assumed
in previous studies.
Within the plausible range of parameters related to these
processes, the ice sheet response to the orbital parameters and atmospheric
CO2 concentration for the last glacial/interglacial cycle was
simulated in terms of both ice volume and geographical distribution, using a
three-dimensional ice-sheet model. Careful treatment of climate-ice sheet feedback is essential for a reliable simulation
of the ice sheet changes during ice age cycles. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|