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The influence of the ∼73 ka Toba super-eruption on the ecosystems of northern Sumatra as recorded in marine core BAR94-25
- Source :
-
Quaternary International . May2012, Vol. 258, p45-53. 9p. - Publication Year :
- 2012
-
Abstract
- Abstract: Examination of pollen content and geochemical analysis of marine core BAR94-25 taken from ∼100 km north-west of Sumatra in the Andaman Sea reveals a ∼100,000 year record of environmental change as well as the influence of the Toba super-eruption at ∼73,000 years ago on the ecosystems of northern Sumatra. The record also contains an older volcanic ash dated to ∼89,000 years ago, allowing a comparison of the effects of two eruptions on the local environments of the island. The immediate effects of the older eruption on the ecosystem of northern Sumatra were limited, though a gradual and substantial increase in pine forest likely followed the event in the longer term. The Toba super-eruption at ∼73,000 years ago, however, had an instantaneous and devastating effect on the pine forests of northern Sumatra. Evidence for impacts of this super-eruption at ∼73,000 years ago on regional climatic conditions remains inconclusive. Climatic changes inferred from the pollen record or estimated via pollen transfer functions date to a few thousand years after the eruption, or are clearly linked to long-term climatic trends initiated a few thousand years before. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 10406182
- Volume :
- 258
- Database :
- Academic Search Index
- Journal :
- Quaternary International
- Publication Type :
- Academic Journal
- Accession number :
- 74110531
- Full Text :
- https://doi.org/10.1016/j.quaint.2011.09.006