Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA
Eocene transient global warming events (hyperthermals) can provide insight into a future warmer world. While much research has focused on the Paleocene–Eocene Thermal Maximum (PETM), hyperthermals of a smaller magnitude can be used to characterize climatic responses over different magnitudes of forc...
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2023
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Online Access: | https://www.vliz.be/imisdocs/publications/70/393970.pdf |
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ftnioz:oai:imis.nioz.nl:368689 2023-12-10T09:46:17+01:00 Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA Rush, W. Self-Trail, J.M. Zhang, Y. Sluijs, A. Brinkhuis, H. Zachos, J.C. Ogg, J.G. Robinson, M.M. 2023 application/pdf https://www.vliz.be/imisdocs/publications/70/393970.pdf en eng info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/cp-19-1677-2023 https://www.vliz.be/imisdocs/publications/70/393970.pdf info:eu-repo/semantics/openAccess %3Ci%3EClim.+Past+19%288%29%3C%2Fi%3E%3A+1677-1698.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Fcp-19-1677-2023%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Fcp-19-1677-2023%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftnioz https://doi.org/10.5194/cp-19-1677-2023 2023-11-15T23:21:56Z Eocene transient global warming events (hyperthermals) can provide insight into a future warmer world. While much research has focused on the Paleocene–Eocene Thermal Maximum (PETM), hyperthermals of a smaller magnitude can be used to characterize climatic responses over different magnitudes of forcing. This study identifies two events, namely the Eocene Thermal Maximum 2 (ETM2 and H2), in shallow marine sediments of the Eocene-aged Salisbury Embayment of Maryland, based on magnetostratigraphy, calcareous nannofossil, and dinocyst biostratigraphy, as well as the recognition of negative stable carbon isotope excursions (CIEs) in biogenic calcite. We assess local environmental change in the Salisbury Embayment, utilizing clay mineralogy, marine palynology, δ 18 O of biogenic calcite, and biomarker paleothermometry (TEX 86 ). Paleotemperature proxies show broad agreement between surface water and bottom water temperature changes. However, the timing of the warming does not correspond to the CIE of the ETM2 as expected from other records, and the highest values are observed during H2, suggesting factors in addition to p CO 2 forcing have influenced temperature changes in the region. The ETM2 interval exhibits a shift in clay mineralogy from smectite-dominated facies to illite-rich facies, suggesting hydroclimatic changes but with a rather dampened weathering response relative to that of the PETM in the same region. Organic walled dinoflagellate cyst assemblages show large fluctuations throughout the studied section, none of which seem systematically related to CIE warming. These observations are contrary to the typical tight correspondence between climate change and assemblages across the PETM, regionally and globally, and ETM2 in the Arctic Ocean. The data do indicate very warm and (seasonally) stratified conditions, likely salinity-driven, across H2. The absence of evidence for strong perturbations in local hydrology and nutrient supply during ETM2 and H2, compared to the PETM, is consistent with the less extreme ... Article in Journal/Newspaper Arctic Arctic Ocean Climate change Global warming NIOZ Repository (Royal Netherlands Institute for Sea Research) Arctic Arctic Ocean Salisbury ENVELOPE(-153.617,-153.617,-85.633,-85.633) Climate of the Past 19 8 1677 1698 |
institution |
Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
Eocene transient global warming events (hyperthermals) can provide insight into a future warmer world. While much research has focused on the Paleocene–Eocene Thermal Maximum (PETM), hyperthermals of a smaller magnitude can be used to characterize climatic responses over different magnitudes of forcing. This study identifies two events, namely the Eocene Thermal Maximum 2 (ETM2 and H2), in shallow marine sediments of the Eocene-aged Salisbury Embayment of Maryland, based on magnetostratigraphy, calcareous nannofossil, and dinocyst biostratigraphy, as well as the recognition of negative stable carbon isotope excursions (CIEs) in biogenic calcite. We assess local environmental change in the Salisbury Embayment, utilizing clay mineralogy, marine palynology, δ 18 O of biogenic calcite, and biomarker paleothermometry (TEX 86 ). Paleotemperature proxies show broad agreement between surface water and bottom water temperature changes. However, the timing of the warming does not correspond to the CIE of the ETM2 as expected from other records, and the highest values are observed during H2, suggesting factors in addition to p CO 2 forcing have influenced temperature changes in the region. The ETM2 interval exhibits a shift in clay mineralogy from smectite-dominated facies to illite-rich facies, suggesting hydroclimatic changes but with a rather dampened weathering response relative to that of the PETM in the same region. Organic walled dinoflagellate cyst assemblages show large fluctuations throughout the studied section, none of which seem systematically related to CIE warming. These observations are contrary to the typical tight correspondence between climate change and assemblages across the PETM, regionally and globally, and ETM2 in the Arctic Ocean. The data do indicate very warm and (seasonally) stratified conditions, likely salinity-driven, across H2. The absence of evidence for strong perturbations in local hydrology and nutrient supply during ETM2 and H2, compared to the PETM, is consistent with the less extreme ... |
format |
Article in Journal/Newspaper |
author |
Rush, W. Self-Trail, J.M. Zhang, Y. Sluijs, A. Brinkhuis, H. Zachos, J.C. Ogg, J.G. Robinson, M.M. |
spellingShingle |
Rush, W. Self-Trail, J.M. Zhang, Y. Sluijs, A. Brinkhuis, H. Zachos, J.C. Ogg, J.G. Robinson, M.M. Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA |
author_facet |
Rush, W. Self-Trail, J.M. Zhang, Y. Sluijs, A. Brinkhuis, H. Zachos, J.C. Ogg, J.G. Robinson, M.M. |
author_sort |
Rush, W. |
title |
Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA |
title_short |
Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA |
title_full |
Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA |
title_fullStr |
Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA |
title_full_unstemmed |
Assessing environmental change associated with early Eocene hyperthermals in the Atlantic Coastal Plain, USA |
title_sort |
assessing environmental change associated with early eocene hyperthermals in the atlantic coastal plain, usa |
publishDate |
2023 |
url |
https://www.vliz.be/imisdocs/publications/70/393970.pdf |
long_lat |
ENVELOPE(-153.617,-153.617,-85.633,-85.633) |
geographic |
Arctic Arctic Ocean Salisbury |
geographic_facet |
Arctic Arctic Ocean Salisbury |
genre |
Arctic Arctic Ocean Climate change Global warming |
genre_facet |
Arctic Arctic Ocean Climate change Global warming |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/cp-19-1677-2023 https://www.vliz.be/imisdocs/publications/70/393970.pdf |
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info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-19-1677-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
8 |
container_start_page |
1677 |
op_container_end_page |
1698 |
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1784889637948358656 |