77 D9. Recent Advances in Paleoclimatology/Paleoceanography

Monday, 23 September 2024
8:00 AM - 12:00 PM
207D

REASSESSING THE TEMPERATURE HISTORY OF THE ORDOVICIAN OCEAN

Paper number: 77-2
Program: Technical Sessions
Time: 8:05 AM – 8:20 AM

Authors

Abstract

Paleotemperature curves may be distorted by uneven sampling distributions and latitudinal temperature differences, which were overlooked during the Ordovician paleotemperature reconstructions. Using well-screened oxygen isotope temperature data (4,949 records), we found that the previously published temperature curve, especially based on bulk-rock δ18O data, was ~10℃ biased on average. After sampling corrections, the reassessed paleotemperature curves revealed Early Ordovician temperature decreased with lower magnitudes of ~5℃ and decoupled temperature change and biodiversity in the tropical area, casting doubt on climate-driven diversification.

Geological Society of America Abstracts with Programs. Vol. 56, No. 5

doi: 10.1130/abs/2024AM-405276

© Copyright 2024 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.