CRETACEOUS-PALEOCENE-EOCENE SEA SURFACE TEMPERATURE EVOLUTION AT HIGHER LATITUDES: CONSTRAINTS FROM TEX<sub>86 </sub>AND PLANKTONIC FORAMINIFERAL OXYGEN ISOTOPES

O'Brien, Charlotte L; Inglis, Gordon N.; Robinson, Stuart A.; Pancost, Richard D.; Huber, Brian T.; Farnsworth, Alexander; Lunt, Daniel

doi:10.1130/abs/2018am-323378

Cited by 40 publications

(79 citation statements)

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“…During the peak warm Cenomanian‐Turonian, conversely, the Arctic Ocean was ice‐free year‐round as also supported by terrestrial records (O'Regan et al, ; see section ). Comparing this high‐latitude record with Late Cretaceous SST values from the low latitudes <30°, this suggests a Northern Hemisphere pole‐equator temperature gradient of about 1–15 °C (Figure ; Wilson & Opdyke, ; Jenkyns et al, ; O'Brien et al, ).…”

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 84%

“…Paleoclimate reconstructions, however, can be used to assess the sensitivity of the Earth's climate system to changes of different forcing parameters (e.g., CO 2 ) and to test the reliability of climate models by evaluating their simulations for conditions very different from the modern climate. In this context, not only high‐resolution studies of the most recent (Holocene) climate history are of importance but also detailed studies of the earlier Earth history characterized by a much warmer (Greenhouse‐type) global climate with elevated atmospheric CO 2 concentrations, such as the Late Cretaceous and the Paleogene (Hong & Lee, ; Kent & Muttoni, ; O'Brien et al, ; Zachos et al, ). A precise knowledge of rates and scales of past climate change are the only mode to separate natural and anthropogenic forcings and will enable us to further increase the reliability of climate change predictions.…”

Section: Recent Arctic Climate Change Future Predictions and Paleormentioning

confidence: 99%

“…The Mesozoic to Cenozoic time interval is a period when the climate on Earth changed from one extreme (Cretaceous‐Paleogene Greenhouse lacking major ice sheets) to another (Neogene Icehouse with bipolar glaciation; Figure ; Pearson & Palmer, ; Norris et al, ; Zachos et al, ; Friedrich et al, ; Kent & Muttoni, ; O'Brien et al, ; O'Connor et al, ). This long‐term climatic evolution, including prominent warm and cold phases, is best reflected in marine deep‐water and surface‐water temperatures determined from benthic and planktic oxygen isotope, Mg/Ca thermometry, and biomarker (TEX 86 and U K 37 ) records, respectively, from low to middle latitudes (e.g., Alsenz et al, ; Bijl et al, ; Friedrich et al, ; Lear et al, ; Littler et al, ; Liu et al, ; Miller et al, ; Mutterlose et al, ; O'Brien et al, ; Zachos et al, ; Zachos et al, ). Peak warm intervals occurred around the Cenomanian/Turonian boundary, during the Paleocene‐Eocene Thermal Maximum (PETM), the Early Eocene Climate Optimum (EECO), and the Middle Eocene Climate Optimum (Figure ), most probably related to higher atmospheric CO 2 concentrations.…”

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 99%

“…According to these authors, tropical‐subtropical conditions prevailed to at least 45°N and possibly to 70°S, and warm to cool‐temperate climates extended to the ice‐free polar regions. Such a greenhouse world was characterized by significantly higher temperatures and reduced latitudinal temperature gradients (O'Brien et al, ; Robinson et al, ; Sinninghe Damsté et al, ). The overall warm climatic conditions most likely resulted from an enhanced greenhouse effect due to higher atmospheric CO 2 concentrations as inferred from various proxies (Figure ; Crowley & Berner, ; Royer, ; Kent & Muttoni, ; Foster et al, ) and conventionally attributed to the balance between the input of CO 2 from ocean crust production, volcanism, metamorphism, and organic carbon weathering and the output of CO 2 from silicate weathering and organic carbon burial (Foster et al, ; Kent & Muttoni, ; Walker et al, ; Weissert & Erba, ).…”

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 99%

“…White circles represent sites where single SST records are shown in Figure . The gray circles represent low‐latitude sites (low paleolatitudes <30°) where data have been used to compile the smoothed composite Late Cretaceous SST record (O'Brien et al, ) shown in Figure . See Table for details.…”

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 99%

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The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

Stein

2019

Paleoceanog and Paleoclimatol

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Over the past 3-4 decades, coincident with global warming and atmospheric CO 2 increase, Arctic sea ice has significantly decreased in its extent as well as in thickness. When extrapolating this alarming trend, the central Arctic Ocean might become ice-free during summers within about the next 2-5 decades. Paleoclimate records allow us to better understand the processes controlling modern climate change and distinguish between natural and anthropogenic forcing. In this context, detailed studies of the earlier Earth history characterized by a much warmer global climate with elevated atmospheric CO 2 concentrations are important. The main focus of this review paper is the long-term late Mesozoic-Cenozoic Arctic Ocean climate history from Greenhouse to Icehouse conditions, with special emphasis on Arctic sea ice history. Starting with some information on the Cretaceous Arctic Ocean climate, this paper will concentrate on selected results from Integrated Ocean Drilling Program (IODP) Expedition 302 (Arctic Ocean Coring Expedition (ACEX)), the first scientific drilling in the permanently ice-covered Arctic Ocean, dealing with the Cenozoic climate history. While these results from ACEX were unprecedented, key questions related to the Cenozoic Arctic climate history remain unanswered, largely due to the major mid-Cenozoic hiatus (if existing) and partly to the poor recovery of the ACEX record. Following-up ACEX and its cutting-edge science, a second scientific drilling on Lomonosov Ridge with a focus on the reconstruction of the continuous and complete Cenozoic Arctic Ocean climate history has currently been proposed and scheduled as IODP Expedition 377 for 2021.

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Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 84%

Section: Recent Arctic Climate Change Future Predictions and Paleormentioning

confidence: 99%

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 99%

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 99%

Section: Long‐term Climate Change From Greenhouse To Icehouse Conditionsmentioning

confidence: 99%

See 3 more Smart Citations

The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

Stein

2019

Paleoceanog and Paleoclimatol

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Conifer‐dominant palynoflora from the Lower Cretaceous in Ordos Basin, China: Biostratigraphical and palaeoclimatic implications

et al. 2020

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Open oceanic and coastal marine sedimentary rocks provide abundant valuable records of Cretaceous greenhouse climates, but limited information is available regarding the Cretaceous continental climate regimes. This study presents a palynological report from the middle Zhidan Group based on the ZK1046 drillcore in the southwestern Ordos Basin of central China. A total of 52 types of palynomorphs including 15 genera of spores (20 species) and 24 genera of gymnosperm pollen (34 species) were recognized in the palynological assemblages. Upwards from the base, the palynomorph assemblages in the ZK1046 drill core were not very diverse. They were dominated by bisaccates and proto‐saccate pollen (around 80%), followed by some fern spores and a low content of Classopollis (below 10%). The overall characteristics of the palynomorph assemblages and some biostratigraphically significant palynomorph genera, such as Ephedripites, Jugella, and Rugubivesiculites, suggest that the middle Zhidan Group dates from the middle Early Cretaceous (probably Hauterivian). Vegetation reconstruction points to conifer‐dominated forests with subordinate pteridophyte, Taxodiaceae, and a few Cheirolepidiaceae plants, indicating a relatively stable, cold, and slightly humid environment. This climatic condition was a likely response to the relatively cool global climate during the middle Early Cretaceous.

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Effects of different constants and standards on the reproducibility of carbonate clumped isotope (Δ₄₇) measurements: Insights from a long‐term dataset

Chang

Defliese

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale Carbonate clumped isotope (Δ47) thermometry examines the temperature‐dependent excess abundance of the 13C–18O bond in the carbonate lattice. Inconsistent temperature calibrations and standard values have been reported among laboratories, which has led to the use of equilibrated gases and carbonate standards for standardization. Furthermore, different acid fractionation factors and isotopic parameter sets have been proposed for improving inter‐laboratory data comparability. However, few long‐term datasets have been generated to explore the effects of these factors on the long‐term reproducibility of Δ47 data within a laboratory. Methods Four standards (ISTB‐1, NBS‐19, GBWO4416, and GB04417) were analyzed as unknowns by isotope ratio mass spectrometry from 2015 to 2019. The values of Δ47 were calibrated using the ETH standards. We investigated the Assonov, Brand, and Gonfiantini isotope parameter sets for carbon and oxygen isotopes, as well as two correction schemes of equilibrated gas and carbonate standardization, using the same sample measurements to determine which procedures enhanced reproducibility. ISTB‐1 (calcite) and ZK312‐346W (dolomite) were measured to determine the 90°C acid fractionation factor. Results The corrected 90°C acid fractionation factors are 0.076 ± 0.008‰ for ISTB‐1 and 0.077 ± 0.009‰ for ZK312‐346W. The choice of isotope parameter set had no significant influence on final Δ47 values in this study. However, using the Assonov parameters to calculate Δ47 values improved the reproducibility of the results. The use of carbonate standards improved reproducibility through time compared with the use of equilibrated gases for standardization. Conclusions At 90°C, the acid fractionation factors of calcite and dolomite are statistically indistinguishable. We find an insignificant effect from changing the isotope parameter set, suggesting that the choice of isotope parameter set among laboratories is not a major factor affecting inter‐laboratory reproducibility. We find that using carbonate standards improved the reproducibility of results, suggesting that the use of carbonate standards may help to achieve inter‐laboratory comparability of results in future studies.

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CRETACEOUS-PALEOCENE-EOCENE SEA SURFACE TEMPERATURE EVOLUTION AT HIGHER LATITUDES: CONSTRAINTS FROM TEX₈₆AND PLANKTONIC FORAMINIFERAL OXYGEN ISOTOPES

Cited by 40 publications

References 0 publications

The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

Conifer‐dominant palynoflora from the Lower Cretaceous in Ordos Basin, China: Biostratigraphical and palaeoclimatic implications

Effects of different constants and standards on the reproducibility of carbonate clumped isotope (Δ₄₇) measurements: Insights from a long‐term dataset

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CRETACEOUS-PALEOCENE-EOCENE SEA SURFACE TEMPERATURE EVOLUTION AT HIGHER LATITUDES: CONSTRAINTS FROM TEX86 AND PLANKTONIC FORAMINIFERAL OXYGEN ISOTOPES

Cited by 40 publications

References 0 publications

The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

Conifer‐dominant palynoflora from the Lower Cretaceous in Ordos Basin, China: Biostratigraphical and palaeoclimatic implications

Effects of different constants and standards on the reproducibility of carbonate clumped isotope (Δ47) measurements: Insights from a long‐term dataset

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CRETACEOUS-PALEOCENE-EOCENE SEA SURFACE TEMPERATURE EVOLUTION AT HIGHER LATITUDES: CONSTRAINTS FROM TEX₈₆AND PLANKTONIC FORAMINIFERAL OXYGEN ISOTOPES

Effects of different constants and standards on the reproducibility of carbonate clumped isotope (Δ₄₇) measurements: Insights from a long‐term dataset