100- kyr cyclicity in volcanic ash emplacement: evidence from a 1.1 Myr tephra record from the NW Pacific.

Schindlbeck, Julie Christin , Jegen, Marion , Freundt, Armin , Kutterolf, Steffen , Straub, Susanne M. , Mleneck-Vautravers, Maryline J. and McManus, Jerry F. (2018) 100- kyr cyclicity in volcanic ash emplacement: evidence from a 1.1 Myr tephra record from the NW Pacific. Open Access Scientific Reports, 8 (Article number 4440). DOI 10.1038/s41598-018-22595-0.

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Abstract

It is a longstanding observation that the frequency of volcanism periodically changes at times of global climate change. The existence of causal links between volcanism and Earth's climate remains highly controversial, partly because most related studies only cover one glacial cycle. Longer records are available from marine sediment profiles in which the distribution of tephras records frequency changes of explosive arc volcanism with high resolution and time precision. Here we show that tephras of IODP Hole U1437B (northwest Pacific) record a cyclicity of explosive volcanism within the last 1.1 Myr. A spectral analysis of the dataset yields a statistically significant spectral peak at the similar to 100 kyr period, which dominates the global climate cycles since the Middle Pleistocene. A time-domain analysis of the entire eruption and delta O-18 record of benthic foraminifera as climate/sea level proxy shows that volcanism peaks after the glacial maximum and similar to 13 +/- 2 kyr before the delta O-18 minimum right at the glacial/interglacial transition. The correlation is especially good for the last 0.7 Myr. For the period 0.7-1.1 Ma, during the Middle Pleistocene Transition (MPT), the correlation is weaker, since the 100 kyr periodicity in the delta O-18 record diminishes, while the tephra record maintains its strong 100 kyr periodicity.

Document Type: Article
Keywords: IZU-BONIN ARC; GLACIAL CYCLES; ICE; DEGLACIATION; CLIMATE; ERUPTIONS; ONSET; JAPAN; TEPHROCHRONOLOGY; TRANSITION; IODP Expedition 350
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1038/s41598-018-22595-0
ISSN: 2045-2322
Projects: IODP
Expeditions/Models/Experiments:
Date Deposited: 29 Mar 2018 07:27
Last Modified: 23 Sep 2019 22:06
URI: http://oceanrep.geomar.de/id/eprint/42481

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