Wasson, R.J. and Donnelly, T.H. (1991) Palaeoclimatic reconstructions for the last 30, 000 years in Australia: a contribution to prediction of future climate. Technical Report. CSIRO, Canberra, Australia.
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Abstract
A compilation of palaeoclimatic reconstruction for Australasia shows that during the mid-Holocene, around 6000 BP, climate was warmer and wetter. On the Australian continent theonly exception was in southwest WA where the palaeoclimate evidence indicates more arid conditions at this time. Within this general picture there was considerable patterning of temperature and rainfall, as a meridional transect from Antarctica to Papua New Guinea. Lake-level records (a surrogatefor P-E) for the Australian continent show a peak around 6000 BP. A similar trend was found for the sub-continent suggesting parallel climate behaviour in the two hemispheres at the time. This finding is contrary to what would be expected if direct forcing by hemispherically asymmetric changes inseasonal solar insolation due to orbital variations were the dominant factor. It is argued that if the forcing was mediated through some hemispherical symmetric process, then the exact cause of warming is irrelevant. The mid Holocene offers both a useful test of the veracity of GCMs and may be auseful analogue of future climate
| Item Type: | Monograph (Technical Report) |
|---|---|
| Uncontrolled Keywords: | Palaeoclimatology; Australia; Weather forecasting; Climatic change; Time series, RP6911 |
| Author Affiliation: | Institute of Natural Resources and Environment Division of Water Resources, Canberra Laboratory CSIRO |
| Subjects: | Atmosperic Science |
| Divisions: | General |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 04 Apr 2014 06:01 |
| Last Modified: | 04 Apr 2014 06:01 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/13015 |
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