 |
| Titel |
Coupled model simulations of mid-Holocene ENSO and comparisons with coral oxygen isotope records |
| VerfasserIn |
J. Brown, M. Collins, A. Tudhope |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7340
|
| Digitales Dokument |
URL |
| Erschienen |
In: 1st Alexander von Humboldt International Conference ; Nr. 6 (2006-01-09), S.29-33 |
| Datensatznummer |
250003233
|
| Publikation (Nr.) |
 copernicus.org/adgeo-6-29-2006.pdf |
|
|
|
|
|
| Zusammenfassung |
| The sensitivity of El Niño-Southern Oscillation (ENSO) to changes in mean
climate is investigated for simulations of pre-industrial and mid-Holocene
(6000 years before present) climate using the Hadley Centre coupled
atmosphere-ocean model, HadCM3. Orbitally-forced changes in insolation in the
mid-Holocene produce changes in seasonality which may alter ENSO amplitude
and frequency. The model simulations are compared with mid-Holocene fossil
coral oxygen isotope records from the western Pacific Warm Pool. The coral
records imply a reduction of around 60% in the amplitude of interannual
variability associated with ENSO in the mid-Holocene, while the model
simulates a smaller reduction in ENSO amplitude of around 10%. The model
also simulates a slight shift to longer period variability and a weakening of
ENSO phase-locking to the seasonal cycle in the mid-Holocene. There is little
change in the pattern of ENSO tropical precipitation teleconnections in the
simulated mid-Holocene climate. |
| |
|
| Teil von |
|
|
|
|
|
|
|