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Sub-decadal- to decadal-scale climate cyclicity during the Holsteinian interglacial (MIS 11) evidenced in annually laminated sediments

Sub-decadal- to decadal-scale climate cyclicity during the Holsteinian interglacial (MIS 11) evidenced in annually laminated sediments
Sub-decadal- to decadal-scale climate cyclicity during the Holsteinian interglacial (MIS 11) evidenced in annually laminated sediments
To unravel the short-term climate variability during Marine Isotope Stage (MIS) 11, which represents a close analogue to the Holocene with regard to orbital boundary conditions, we performed microfacies and time series analyses on a ~3200-yr-long record of annually laminated Holsteinian lake sediments from Dethlingen, northern Germany. These biogenic varves comprise two sub-layers: a light sub-layer, which is controlled by spring/summer diatom blooms, and a dark sub-layer consisting mainly of amorphous organic matter and fragmented diatom frustules deposited during autumn/winter. Time series analyses were performed on the thickness of the light and dark sub-layers. Signals exceeding the 95% and 99% confidence levels occur at periods that are near-identical to those known from modern instrumental data and Holocene palaeoclimatic records. Spectral peaks at periods of 90, 25, and 10.5 yr are likely associated with the 88-, 22- and 11-yr solar cycles, respectively. This variability is mainly expressed in the light sub-layer spectra, suggesting solar influence on the palaeoproductivity of the lake. Significant signals at periods between 3 and 5 yr and at ?6 yr are strongest expressed in the dark sub-layer spectra and may reflect an influence of the El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO) during autumn/winter. Our results suggest that solar forcing and ENSO/NAO-like variability influenced central European climate during MIS 11 similarly to the present interglacial, thus demonstrating the comparability of the two interglacial periods at sub-decadal to decadal timescales.
1814-9332
987-999
Koutsodendris, A.
b6cad26c-a130-4139-9dc3-c1530f582621
Brauer, A.
8b995222-45b1-44e0-b63b-d723687d4ebd
Pälike, H.
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Müller, U.C.
93cc2f4a-8844-4644-87b2-16ce9872ef8e
Dulski, P.
a2f00171-f6cc-469f-abcc-953271a36163
Lotter, A.F.
e950d249-e442-4154-9c41-c7d7cf7bd6a4
Pross, J.
e6953dba-20e4-4abd-8b01-4e1ac8d1e14a
Koutsodendris, A.
b6cad26c-a130-4139-9dc3-c1530f582621
Brauer, A.
8b995222-45b1-44e0-b63b-d723687d4ebd
Pälike, H.
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Müller, U.C.
93cc2f4a-8844-4644-87b2-16ce9872ef8e
Dulski, P.
a2f00171-f6cc-469f-abcc-953271a36163
Lotter, A.F.
e950d249-e442-4154-9c41-c7d7cf7bd6a4
Pross, J.
e6953dba-20e4-4abd-8b01-4e1ac8d1e14a

Koutsodendris, A., Brauer, A., Pälike, H., Müller, U.C., Dulski, P., Lotter, A.F. and Pross, J. (2011) Sub-decadal- to decadal-scale climate cyclicity during the Holsteinian interglacial (MIS 11) evidenced in annually laminated sediments. Climate of the Past, 7 (3), 987-999. (doi:10.5194/cp-7-987-2011).

Record type: Article

Abstract

To unravel the short-term climate variability during Marine Isotope Stage (MIS) 11, which represents a close analogue to the Holocene with regard to orbital boundary conditions, we performed microfacies and time series analyses on a ~3200-yr-long record of annually laminated Holsteinian lake sediments from Dethlingen, northern Germany. These biogenic varves comprise two sub-layers: a light sub-layer, which is controlled by spring/summer diatom blooms, and a dark sub-layer consisting mainly of amorphous organic matter and fragmented diatom frustules deposited during autumn/winter. Time series analyses were performed on the thickness of the light and dark sub-layers. Signals exceeding the 95% and 99% confidence levels occur at periods that are near-identical to those known from modern instrumental data and Holocene palaeoclimatic records. Spectral peaks at periods of 90, 25, and 10.5 yr are likely associated with the 88-, 22- and 11-yr solar cycles, respectively. This variability is mainly expressed in the light sub-layer spectra, suggesting solar influence on the palaeoproductivity of the lake. Significant signals at periods between 3 and 5 yr and at ?6 yr are strongest expressed in the dark sub-layer spectra and may reflect an influence of the El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO) during autumn/winter. Our results suggest that solar forcing and ENSO/NAO-like variability influenced central European climate during MIS 11 similarly to the present interglacial, thus demonstrating the comparability of the two interglacial periods at sub-decadal to decadal timescales.

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Published date: 2011
Organisations: Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 201425
URI: http://eprints.soton.ac.uk/id/eprint/201425
ISSN: 1814-9332
PURE UUID: c86972bf-2f8d-46eb-9d7b-249fdc112046

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Date deposited: 27 Oct 2011 13:06
Last modified: 14 Mar 2024 04:21

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Contributors

Author: A. Koutsodendris
Author: A. Brauer
Author: H. Pälike
Author: U.C. Müller
Author: P. Dulski
Author: A.F. Lotter
Author: J. Pross

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