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- Title
Observed relationships between El Niño-Southern Oscillation, rainfall variability and vegetation and fire history on Halmahera, Maluku, Indonesia.
- Authors
VAN DER KAARS, SANDER; TAPPER, NIGEL; COOK, ELLYN J.
- Abstract
A temporally high-resolution palynological study of the uppermost section of core MD98-2180 from Kau Bay, Halmahera, Indonesia, provides a vegetation and fire record covering the last 250 years. The record is compared with the Maluku Rainfall Index, Southern Oscillation Index (SOI) and southern hemisphere winter sea surface temperatures (SST) for the central Pacific Ocean based on instrumental data, as well as reconstructions of the SOI and the central Pacific SST and historically recorded El Niño events. The results show that significant El Niño events are generally associated with increased representation of Dipterocarpaceae pollen, probably reflecting the mass-flowering of this taxon during El Niño-Southern Oscillation (ENSO) droughts, and elevated charcoal levels, reflecting a greater incidence of fires during these extremely dry periods, while humid phases show increased fern numbers. Our findings demonstrate that pollen records ‘ecological’ in scale can provide useful additional proxy records of ENSO events.
- Subjects
MALUKU (Indonesia); INDONESIA; VEGETATION &; climate; FIRES; DISASTERS; DIPTEROCARPACEAE; POLLEN; CARBON; HALMAHERA (Indonesia)
- Publication
Global Change Biology, 2010, Vol 16, Issue 6, p1705
- ISSN
1354-1013
- Publication type
Article
- DOI
10.1111/j.1365-2486.2009.02025.x