Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse

  title={Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse},
  author={Andr{\'e} Bornemann and Richard D. Norris and Oliver Friedrich and Britta Beckmann and Stefan Schouten and Jaap S. Sinninghe Damst{\'e} and Jennifer A. Vogel and Peter Hofmann and Thomas Wagner},
  pages={189 - 192}
The Turonian (93.5 to 89.3 million years ago) was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C. High-amplitude sea-level changes and positive δ18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of extreme warmth. New δ18O data from the tropical Atlantic show synchronous shifts ∼91.2 million years ago for both the surface and deep ocean that are consistent with an approximately 200,000-year… 
The Magnitude and Duration of Late Ordovician–Early Silurian Glaciation
This work used carbonate “clumped” isotope paleothermometry to constrain ocean temperatures, and thereby estimate ice volumes, through the Late Ordovician–Early Silurian glaciation, and finds tropical ocean temperatures of 32° to 37°C except for short-lived cooling by ~5°C during the final Ordovicians stage.
Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse
It is shown that the palaeogeography typifying the Cenomanian–Turonian renders the Earth System resilient to glaciation with no perennial ice accumulation occurring under prescribed CO2 levels as low as 420 p.p.m.
Anatomy of a eustatic event during the Turonian (Late Cretaceous) hot greenhouse climate
  • B. Haq, B. Huber
  • Environmental Science, Geography
    Science China Earth Sciences
  • 2016
Sequence stratigraphic studies consider relative change in sea level (as regulated by eustasy, local tectonics and sediment supply) as the main builder of the stratigraphic record. Eustasy has
Temperate rainforests near the South Pole during peak Cretaceous warmth
Multi-proxy core data and model simulations support the presence of temperate rainforests near the South Pole during mid-Cretaceous warmth, indicating very high CO 2 levels and the absence of Antarctic ice.
The rise and fall of the Cretaceous Hot Greenhouse climate
High sea-surface temperatures during the Early Cretaceous Epoch
The Early Cretaceous Epoch, about 145–100 million years ago, is generally thought of as a greenhouse period, with high atmospheric CO2 concentrations1 and high global mean temperatures2. But evidence
Evidence for global cooling in the Late Cretaceous
A record of SSTs for the Campanian–Maastrichtian interval from hemipelagic sediments deposited on the western North Atlantic shelf reveals that the North Atlantic was relatively warm in the earliest Campanian, but experienced significant cooling after this, suggesting that the cooling pattern was global rather than regional and, therefore, driven predominantly by declining atmospheric pCO2 levels.
Late Cretaceous Temperature Evolution of the Southern High Latitudes: A TEX86 Perspective
The Late Cretaceous was a greenhouse world, characterized by elevated temperatures and high atmospheric pCO2. Even in the context of an extreme greenhouse climate, existing planktic foraminiferal
A stable and hot Turonian without glacial δ18O excursions is indicated by exquisitely preserved Tanzanian foraminifera
A shift from the icehouse climate in which humans evolved to a Late Cretaceous–like greenhouse climate is an often-repeated cautionary prediction of the consequences of continued anthropogenic CO 2


Palaeobotanical evidence for a warm Cretaceous Arctic Ocean
THE Cretaceous period was a time of global warmth1–4. Mid-Cretaceous equatorial temperatures were similar to today's5, but the equator-to-pole temperature gradient is the subject of some
Warm tropical sea surface temperatures in the Late Cretaceous and Eocene epochs
New data from exceptionally well preserved foraminifer shells extracted from impermeable clay-rich sediments indicate that for the intervals studied, tropical sea surface temperatures were at least 28–32 °C, more in line with the understanding of the geographical distributions of temperature-sensitive fossil organisms and the results of climate models with increased CO2 levels.
Rapid Cenozoic glaciation of Antarctica induced by declining atmospheric CO2
In this simulation, declining Cenozoic CO2 first leads to the formation of small, highly dynamic ice caps on high Antarctic plateaux, and at a later time, a CO2 threshold is crossed, initiating ice-sheet height/mass-balance feedbacks that cause the ice caps to expand rapidly with large orbital variations, eventually coalescing into a continental-scale East Antarctic Ice Sheet.
Mid-Cretaceous (Albian–Santonian) sea surface temperature record of the tropical Atlantic Ocean
Paleoclimate records of geologic time periods characterized by extreme global warmth such as the mid-Cretaceous are important for a better understanding of the Earth9s climate system operating in an
The Phanerozoic Record of Global Sea-Level Change
Long-term sea level peaked at 100 ± 50 meters during the Cretaceous, implying that ocean-crust production rates were much lower than previously inferred, and presents a new sea-level record for the past 100 million years.
Deep-sea paleotemperature record of extreme warmth during the Cretaceous
Oxygen isotope analyses of well-preserved foraminifera from Blake Nose (30°N paleolatitude, North Atlantic) and globally distributed deep-sea sites provide a long-term paleotemperature record for the
Midlatitude shelf seas in the Cenomanian‐Turonian greenhouse world: Temperature evolution and North Atlantic circulation
[1] An 8 million year record of subtropical and midlatitude shelf-sea temperatures, derived from oxygen isotopes of well-preserved brachiopods from a variety of European sections, demonstrates a
Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean
The changes in oxygen-isotope composition across the Eocene/Oligocene boundary are too large to be explained by Antarctic ice-sheet growth alone and must therefore also indicate contemporaneous global cooling and/or Northern Hemisphere glaciation.
Evidence for Late Cretaceous (Late Turonian) climate cooling from oxygen-isotope variations and palaeobiogeographic changes in Western and Central Europe
  • S. Voigt, F. Wiese
  • Environmental Science, Geography
    Journal of the Geological Society
  • 2000
Trends of stable oxygen-isotope data through four European sections of Middle–Upper Turonian sediments show three phases of synchronous variations, each phase having a duration of about 250 ka. The