DOI: 10.1016/j.epsl.2020.116388
论文题名: Temperature changes across the Paleocene-Eocene Thermal Maximum – a new high-resolution TEX86 temperature record from the Eastern North Sea Basin
作者: Stokke E.W. ; Jones M.T. ; Tierney J.E. ; Svensen H.H. ; Whiteside J.H.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 544 语种: 英语
中文关键词: North Atlantic Igneous Province
; palaeotemperatures
; PETM
; TEX86
英文关键词: Carbon
; Explosives
; Global warming
; Stratigraphy
; Surface waters
; Environmental change
; Hyperthermal events
; Large temperature variations
; Non-thermal factors
; North Atlantic Igneous Province
; Paleocene-eocene thermal maximums
; Sea surface temperature (SST)
; Temperature response
; Oceanography
; carbon cycle
; emplacement
; global warming
; hydrothermal system
; image resolution
; Paleocene-Eocene boundary
; sea surface temperature
; temperature anomaly
; volcanism
; Atlantic Ocean
; North Sea
英文摘要: The Paleocene-Eocene Thermal Maximum (PETM; ∼55.9 Ma) was a hyperthermal event associated with large carbon cycle perturbations, sustained global warming, and marine and terrestrial environmental changes. One possible trigger and/or source of the carbon release that initiated the PETM is the emplacement of the North Atlantic Igneous Province (NAIP). This study focuses on an expanded section of marine clays and diatomite on Fur Island in northern Denmark, where the entire PETM sequence has been identified by a negative ∼4.5‰ δ13CTOC excursion. This remarkably well-preserved section also contains >180 interbedded ash layers sourced from the NAIP, making it an ideal site for investigating the correlations between large-scale volcanism and environmental changes. This study provides a new and complete high-resolution TEX86-derived sea-surface temperature (SST) reconstruction over the entire PETM and the post-PETM section (up to about 54.6 Ma). The palaeothermometry record indicates an apparent short-lived cooling episode in the late Paleocene, followed by a pronounced temperature response to the PETM carbon cycle perturbations with a ∼10 °C SST increase during the PETM onset (up to ∼33 °C). Extreme SSTs fall shortly after the PETM onset, and continue to decrease during the PETM body and recovery, down to anomalously cool SSTs post-PETM (∼11–23 °C). Both phases of potential cooling coincide with proxies of active NAIP volcanism, suggesting a causal connection, although several overprinting non-thermal factors complicate interpretations of the TEX86 values. Indices of effusive and explosive NAIP volcanism are largely absent from the Danish stratigraphy during the PETM body, though a re-emergence toward the end of the PETM suggest NAIP volcanism might have played a role in the PETM termination in the North Sea. This new SST record completes the previous fragmented view of climate changes at this globally important PETM site, and indicates large temperature variations in the North Sea during the earliest Eocene that are possibly linked to NAIP volcanism. © 2020 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165289
Appears in Collections: 气候变化与战略
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作者单位: Centre for Earth Evolution and Dynamics (CEED), University of Oslo, PO Box 1028 Blindern, Oslo, 0315, Norway; The University of Arizona, Department of Geosciences, 1040 E 4th St, Tucson, AZ 85721, United States; School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, SO14 3ZH, United Kingdom
Recommended Citation:
Stokke E.W.,Jones M.T.,Tierney J.E.,et al. Temperature changes across the Paleocene-Eocene Thermal Maximum – a new high-resolution TEX86 temperature record from the Eastern North Sea Basin[J]. Earth and Planetary Science Letters,2020-01-01,544