Deglacial Warming and Hydroclimate Variability in the Central Indonesian Archipelago.

Schröder, Jan, Kuhnt, Wolfgang, Holbourn, Ann, Beil, Sebastian, Zhang, Peng, Hendrizan, Marfasran and Xu, Jian (2018) Deglacial Warming and Hydroclimate Variability in the Central Indonesian Archipelago. Paleoceanography and Paleoclimatology, 33 (9). pp. 974-993. DOI 10.1029/2018PA003323.

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Supplementary data:

Abstract

We present centennial‐scale records of sea surface temperature and oxygen isotopes from the Celebes Sea, Makassar Strait, Flores Sea, and northwestern Banda Sea, which provide new insights into the variability of Indonesian hydroclimate over the past 25 kyr. Deglacial warming was generally gradual with an amplitude of 3–4 °C. Statistical evaluation of the temperature data suggests that the onset of deglacial sea surface temperatures warming in the tropical Indonesian Sea occurred earlier than the global atmospheric CO2 rise. In contrast to previous terrestrial precipitation records, our ice volume‐corrected δ18O of seawater (δ18Osw) does not support widespread aridity in central Indonesia during the last glacial period. While δ18Osw was substantially enriched during Heinrich Stadial 1 and the Younger Dryas, δ18Osw values were only ~0.2‰ heavier during the Last Glacial Maximum than during the Holocene. Heavier δ18Osw during Heinrich Stadial 1 and the Younger Dryas either reflects a decline in precipitation amount and/or increased δ18O of rainfall in central Indonesia, both likely caused by a southward displacement of the tropical rain belt. Comparison of the Celebes Sea, Makassar Strait, Flores Sea, and Banda Sea records suggests that rainfall isotope and/or amount changes were comparable over Borneo and Sulawesi during the last termination.

Document Type: Article
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > Leibniz-Institut für Meereswissenschaften
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2018PA003323
ISSN: 2572-4517
Projects: Future Ocean
Date Deposited: 30 Jan 2019 09:55
Last Modified: 06 Feb 2020 09:16
URI: http://oceanrep.geomar.de/id/eprint/45535

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