Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe
Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology or Earth and Environmental Sciences, Department of Earth and Environmental Sciences Paleotemperature reconstructions linked to Deccan traps volcanic greenhouse gas emissions and associated feed...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/2027.42/171489 https://doi.org/10.7302/4001 |
id |
ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/171489 |
---|---|
record_format |
openpolar |
spelling |
ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/171489 2023-08-20T04:04:50+02:00 Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe O'Hora, Heidi Earth and Environmental Sciences, Department of Ann Arbor 2021-08 application/pdf https://hdl.handle.net/2027.42/171489 https://doi.org/10.7302/4001 en_US eng https://hdl.handle.net/2027.42/171489 https://dx.doi.org/10.7302/4001 Geological Sciences Science Article 2021 ftumdeepblue https://doi.org/10.7302/4001 2023-07-31T21:09:14Z Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology or Earth and Environmental Sciences, Department of Earth and Environmental Sciences Paleotemperature reconstructions linked to Deccan traps volcanic greenhouse gas emissions and associated feedbacks in the lead-up to the end-Cretaceous meteorite impact and extinction document local and global climate trends during a key interval of geologic history. Here, we present a new clumped-isotope-based paleotemperature record derived from fossil bivalves from the Maastrichtian type region, in southeast Netherlands and northeast Belgium. Clumped isotope data documents a mean temperature of 19.2 3.8 C, consistent with other Maastrichtian temperature estimates, and an average seawater δ18O value of -0.2 0.9‰ 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 CO2 emissions prior to the end-Cretaceous extinction to climate change in the Maastricht region. Fluctuating seawater δ18O 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. http://deepblue.lib.umich.edu/bitstream/2027.42/171489/1/OHora_Heidi_MS_Thesis_2021.pdf c5a42028-499d-4e85-9fdc-dc71e2baca26 Description of OHora_Heidi_MS_Thesis_2021.pdf : MS thesis SELF Article in Journal/Newspaper Arctic Arctic Ocean Climate change University of Michigan: Deep Blue Arctic Arctic Ocean |
institution |
Open Polar |
collection |
University of Michigan: Deep Blue |
op_collection_id |
ftumdeepblue |
language |
English |
topic |
Geological Sciences Science |
spellingShingle |
Geological Sciences Science O'Hora, Heidi Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe |
topic_facet |
Geological Sciences Science |
description |
Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology or Earth and Environmental Sciences, Department of Earth and Environmental Sciences Paleotemperature reconstructions linked to Deccan traps volcanic greenhouse gas emissions and associated feedbacks in the lead-up to the end-Cretaceous meteorite impact and extinction document local and global climate trends during a key interval of geologic history. Here, we present a new clumped-isotope-based paleotemperature record derived from fossil bivalves from the Maastrichtian type region, in southeast Netherlands and northeast Belgium. Clumped isotope data documents a mean temperature of 19.2 3.8 C, consistent with other Maastrichtian temperature estimates, and an average seawater δ18O value of -0.2 0.9‰ 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 CO2 emissions prior to the end-Cretaceous extinction to climate change in the Maastricht region. Fluctuating seawater δ18O 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. http://deepblue.lib.umich.edu/bitstream/2027.42/171489/1/OHora_Heidi_MS_Thesis_2021.pdf c5a42028-499d-4e85-9fdc-dc71e2baca26 Description of OHora_Heidi_MS_Thesis_2021.pdf : MS thesis SELF |
author2 |
Earth and Environmental Sciences, Department of Ann Arbor |
format |
Article in Journal/Newspaper |
author |
O'Hora, Heidi |
author_facet |
O'Hora, Heidi |
author_sort |
O'Hora, Heidi |
title |
Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe |
title_short |
Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe |
title_full |
Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe |
title_fullStr |
Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe |
title_full_unstemmed |
Clumped-isotope-derived climate trends leading up to the end-Cretaceous mass extinction in northwest Europe |
title_sort |
clumped-isotope-derived climate trends leading up to the end-cretaceous mass extinction in northwest europe |
publishDate |
2021 |
url |
https://hdl.handle.net/2027.42/171489 https://doi.org/10.7302/4001 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change |
genre_facet |
Arctic Arctic Ocean Climate change |
op_relation |
https://hdl.handle.net/2027.42/171489 https://dx.doi.org/10.7302/4001 |
op_doi |
https://doi.org/10.7302/4001 |
_version_ |
1774715230982504448 |