Cavalheiro, Liyenne, Wagner, Thomas ORCID: 0000-0001-5006-625X, Steinig, Sebastian ORCID: 0000-0003-3700-1106, Bottini, Cinzia, Dummann, Wolf, Esegbue, Onoriode, Gambacorta, Gabriele, Giraldo-Gomez, Victor, Farnsworth, Alexander, Floegel, Sascha, Hofmann, Peter, Lunt, Daniel J., Rethemeyer, Janet ORCID: 0000-0001-6698-4186, Torricelli, Stefano and Erba, Elisabetta (2021). Impact of global cooling on Early Cretaceous high pCO(2) world during the Weissert Event. Nat. Commun., 12 (1). BERLIN: NATURE PORTFOLIO. ISSN 2041-1723

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Abstract

The Weissert Event similar to 133 million years ago marked a profound global cooling that punctuated the Early Cretaceous greenhouse. We present modelling, high-resolution bulk organic carbon isotopes and chronostratigraphically calibrated sea surface temperature (SSTs) based on an organic paleothermometer (the TEX86 proxy), which capture the Weissert Event in the semi-enclosed Weddell Sea basin, offshore Antarctica (paleolatitude similar to 54 degrees S; paleowater depth similar to 500 meters). We document a similar to 3-4 degrees C drop in SST coinciding with the Weissert cold end, and converge the Weddell Sea data, climate simulations and available worldwide multi-proxy based temperature data towards one unifying solution providing a best-fit between all lines of evidence. The outcome confirms a 3.0 degrees C (+/- 1.7 degrees C) global mean surface cooling across the Weissert Event, which translates into a similar to 40% drop in atmospheric pCO(2) over a period of similar to 700 thousand years. Consistent with geologic evidence, this pCO(2) drop favoured the potential build-up of local polar ice.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Cavalheiro, LiyenneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wagner, ThomasUNSPECIFIEDorcid.org/0000-0001-5006-625XUNSPECIFIED
Steinig, SebastianUNSPECIFIEDorcid.org/0000-0003-3700-1106UNSPECIFIED
Bottini, CinziaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dummann, WolfUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esegbue, OnoriodeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gambacorta, GabrieleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giraldo-Gomez, VictorUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Farnsworth, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Floegel, SaschaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hofmann, PeterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lunt, Daniel J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rethemeyer, JanetUNSPECIFIEDorcid.org/0000-0001-6698-4186UNSPECIFIED
Torricelli, StefanoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erba, ElisabettaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-599986
DOI: 10.1038/s41467-021-25706-0
Journal or Publication Title: Nat. Commun.
Volume: 12
Number: 1
Date: 2021
Publisher: NATURE PORTFOLIO
Place of Publication: BERLIN
ISSN: 2041-1723
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SEA-SURFACE TEMPERATURES; ISOPRENOID TETRAETHER LIPIDS; NORTHERN-HEMISPHERE; CLIMATE SENSITIVITY; TEX86; CARBON; CO2; CALIBRATION; VOLCANISM; EVOLUTIONMultiple languages
Multidisciplinary SciencesMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/59998

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