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Short-term warming events during the boreal Albian (mid-Cretaceous)

Short-term warming events during the boreal Albian (mid-Cretaceous)
Short-term warming events during the boreal Albian (mid-Cretaceous)
Pronounced paleotemperature variations associated with the carbon cycle perturbations of oceanic anoxic events (OAEs 1b and 1d) are known to have occurred during the early and latest Albian. However, reliable paleotemperature data spanning the 12 m.y. between these two events are sparse. Here we present ?18O, ?13C, and Mg/Ca data for the middle to early-late Albian based on analysis of unusually well preserved “glassy” foraminifers from a clay-rich sequence drilled in the boreal Lower Saxony Basin (northwestern Germany; ?45°N paleolatitude). Our records reveal pronounced variability in planktic ?18O (?1.5‰–2.5‰) on a 100 k.y. time scale that we interpret to indicate substantial changes in sea-surface temperature (to ?7 °C) and ?18O/salinity (to ?3 psu). Our findings attest to the climatic sensitivity of marginal basins in these boreal latitudes during the mid-Cretaceous and suggest that the heat and salt budgets of the Lower Saxony Basin were orbitally conditioned during the Albian, presumably through atmospheric or oceanic heat transport from lower latitudes where surface waters were warmer than today, in response to strong greenhouse gas forcing.
0091-7613
223-226
Erbacher, Jochen
77fb7ba3-7411-4331-aa09-c467cd9c43ba
Friedrich, Oliver
680f066c-a4b1-4647-beb3-281addc1ee17
Wilson, Paul A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
Lehmann, Jens
c5d25e2d-62c7-45f5-9d6a-b5eb4ab361d4
Weiss, Wolfgang
c06f6f5a-1a0c-4920-9dda-8ca3ff2757d1
Erbacher, Jochen
77fb7ba3-7411-4331-aa09-c467cd9c43ba
Friedrich, Oliver
680f066c-a4b1-4647-beb3-281addc1ee17
Wilson, Paul A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
Lehmann, Jens
c5d25e2d-62c7-45f5-9d6a-b5eb4ab361d4
Weiss, Wolfgang
c06f6f5a-1a0c-4920-9dda-8ca3ff2757d1

Erbacher, Jochen, Friedrich, Oliver, Wilson, Paul A., Lehmann, Jens and Weiss, Wolfgang (2011) Short-term warming events during the boreal Albian (mid-Cretaceous). Geology, 39 (3), 223-226. (doi:10.1130/G31606.1).

Record type: Article

Abstract

Pronounced paleotemperature variations associated with the carbon cycle perturbations of oceanic anoxic events (OAEs 1b and 1d) are known to have occurred during the early and latest Albian. However, reliable paleotemperature data spanning the 12 m.y. between these two events are sparse. Here we present ?18O, ?13C, and Mg/Ca data for the middle to early-late Albian based on analysis of unusually well preserved “glassy” foraminifers from a clay-rich sequence drilled in the boreal Lower Saxony Basin (northwestern Germany; ?45°N paleolatitude). Our records reveal pronounced variability in planktic ?18O (?1.5‰–2.5‰) on a 100 k.y. time scale that we interpret to indicate substantial changes in sea-surface temperature (to ?7 °C) and ?18O/salinity (to ?3 psu). Our findings attest to the climatic sensitivity of marginal basins in these boreal latitudes during the mid-Cretaceous and suggest that the heat and salt budgets of the Lower Saxony Basin were orbitally conditioned during the Albian, presumably through atmospheric or oceanic heat transport from lower latitudes where surface waters were warmer than today, in response to strong greenhouse gas forcing.

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Published date: 3 February 2011

Identifiers

Local EPrints ID: 178105
URI: http://eprints.soton.ac.uk/id/eprint/178105
ISSN: 0091-7613
PURE UUID: fdbf22e8-709b-40c7-a158-5d96b9a342c1

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Date deposited: 22 Mar 2011 16:23
Last modified: 16 Jul 2019 23:44

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