Growth increment width measurement and SGIshell data, and COSMOS model simulations ...
New sclerochronological data suggest that a variability comparable to the North Atlantic Oscillation (NAO) was already present during the middle Oligocene, about 20 Myr earlier than formerly assumed. Annual increment width data of long-lived marine bivalves of Oligocene (30-25 Ma) strata from Centra...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2018
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.884968 https://doi.pangaea.de/10.1594/PANGAEA.884968 |
| Summary: | New sclerochronological data suggest that a variability comparable to the North Atlantic Oscillation (NAO) was already present during the middle Oligocene, about 20 Myr earlier than formerly assumed. Annual increment width data of long-lived marine bivalves of Oligocene (30-25 Ma) strata from Central Europe revealed a distinct quasi-decadal climate variability modulated on 2-12 (mainly 3-7) year cycles. As in many other modern bivalves, these periodic changes in shell growth were most likely related to changes in primary productivity, which in turn, were coupled to atmospheric circulation patterns. Stable carbon isotope values of the shells (d13Cshell) further corroborated the link between shell growth and food availability. Sub-decal oscillations in the 3-7 year band in other annually resolved fossil archives were often interpreted as El Niño-Southern Oscillation (ENSO) cycles. This possibility is discussed in the present study. However, combined shell-derived proxy and numerical climate model data lend ... : Supplement to: Walliser, Eric Otto; Lohmann, Gerrit; Niezgodzki, Igor; Schöne, Bernd R (2017): Inter-annual climate variability in Europe during the Oligocene icehouse. Palaeogeography, Palaeoclimatology, Palaeoecology, 475, 140-153 ... |
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