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
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.