A 135,000-YEAR RECORD OF VEGETATIONAL AND CLIMATIC-CHANGE FROM THE BANDUNG AREA, WEST-JAVA, INDONESIA

Citation
Wa. Vanderkaars et Mac. Dam, A 135,000-YEAR RECORD OF VEGETATIONAL AND CLIMATIC-CHANGE FROM THE BANDUNG AREA, WEST-JAVA, INDONESIA, Palaeogeography, palaeoclimatology, palaeoecology, 117(1-2), 1995, pp. 55-72
Citations number
34
Categorie Soggetti
Paleontology
ISSN journal
00310182
Volume
117
Issue
1-2
Year of publication
1995
Pages
55 - 72
Database
ISI
SICI code
0031-0182(1995)117:1-2<55:A1ROVA>2.0.ZU;2-9
Abstract
Sedimentological and palynological analyses of sediment cores from the intramontane Bandung basin (West-Java, Indonesia) provide a first pal aeoclimatic record for the Indonesian region covering continuously the last,135,000 years. Our data on palaeosol development indicate anomal ously dry conditions for the final part of the penultimate glacial per iod, around 135,000 yr B.P., and very warm and humid interglacial cond itions from 126,000 to 81,000 yr B.P. During the transition to the las t glacial period, around 81,000 yr B.P., freshwater swamp forest of th e Bandung plain was replaced by an open swamp vegetation dominated by grasses and sedges, indicating a change to considerably drier conditio ns, possibly related to reduced moisture uptake by the NW monsoon as a consequence of lower sea levels at the onset of glacial conditions. A strong reduction in Asplenium ferns from 81,000 to 74,000 yr B.P. sug gests that drier conditions may also have occurred in the mountains of the Bandung area, while increased numbers indicate that from 74,000 t o 47,000 yr B.P. it was slightly wetter again. Inferred depression of montane vegetation zones and reduced fern percentages suggests distinc tly cooler and possibly drier climatic conditions prevailed in the Ban dung area from 47,000 to approximately 20,000 yr B.P. For the Last Gla cial Maximum 4-7 degrees C lower temperatures are recorded.