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- Title
Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwestern Europe.
- Authors
O'Hora, Heidi E.; Petersen, Sierra V.; Vellekoop, Johan; Jones, Matthew M.; Scholz, Serena R.
- Abstract
Paleotemperature reconstructions of the end-Cretaceous interval document local and global climate trends, some driven by greenhouse gas emissions from Deccan Traps volcanism and associated feedbacks. Here, we present a new clumped-isotope-based paleotemperature record derived from fossil bivalves from the Maastrichtian type region in southeastern Netherlands and northeastern Belgium. Clumped isotope data document a mean temperature of 20.4±3.8 ∘ C, consistent with other Maastrichtian temperature estimates, and an average seawater δ18 O value of 0.2±0.8‰ VSMOW for the region during the latest Cretaceous (67.1–66.0 Ma). A notable temperature increase at ∼66.4 Ma is interpreted to be a regional manifestation of the globally defined Late Maastrichtian Warming Event, linking Deccan Traps volcanic CO 2 emissions to climate change in the Maastricht region. Fluctuating seawater δ18 O values coinciding with temperature changes suggest alternating influences of warm, salty southern-sourced waters and cooler, fresher northern-sourced waters from the Arctic Ocean. This new paleotemperature record contributes to the understanding of regional and global climate response to large-scale volcanism and ocean circulation changes leading up to a catastrophic mass extinction.
- Subjects
MAASTRICHT (Netherlands); NETHERLANDS; BELGIUM; MASS extinctions; OCEAN circulation; FOSSIL bivalves; CARBON emissions; DECCAN traps; FRESH water
- Publication
Climate of the Past, 2022, Vol 18, Issue 9, p1963
- ISSN
1814-9324
- Publication type
Article
- DOI
10.5194/cp-18-1963-2022