 |
| Titel |
Low-frequency oscillations of the Atlantic Ocean meridional overturning circulation in a coupled climate model |
| VerfasserIn |
M. Schulz, M. Prange, A. Klocker |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 3, no. 1 ; Nr. 3, no. 1 (2007-02-07), S.97-107 |
| Datensatznummer |
250000744
|
| Publikation (Nr.) |
 copernicus.org/cp-3-97-2007.pdf |
|
|
|
|
|
| Zusammenfassung |
| Using a 3-dimensional climate model of intermediate complexity we show that
the overturning circulation of the Atlantic Ocean can vary at
multicentennial-to-millennial timescales for modern boundary conditions. A
continuous freshwater perturbation in the Labrador Sea pushes the
overturning circulation of the Atlantic Ocean into a bi-stable regime,
characterized by phases of active and inactive deep-water formation in the
Labrador Sea. In contrast, deep-water formation in the Nordic Seas is active
during all phases of the oscillations. The actual timing of the transitions
between the two circulation states occurs randomly. The oscillations
constitute a 3-dimensional phenomenon and have to be distinguished from
low-frequency oscillations seen previously in 2-dimensional models of the
ocean. A conceptual model provides further insight into the essential
dynamics underlying the oscillations of the large-scale ocean circulation.
The model experiments indicate that the coupled climate system can exhibit
unforced climate variability at multicentennial-to-millennial timescales
that may be of relevance for Holocene climate variations. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|