Temperate rainforests near the South Pole during peak Cretaceous warmth

  title={Temperate rainforests near the South Pole during peak Cretaceous warmth},
  author={Johann Philipp Klages and Ulrich Salzmann and Torsten Bickert and C. Hillenbrand and Karsten Gohl and Gerhard Kuhn and Steven M. Bohaty and J{\"u}rgen Titschack and Juliane M{\"u}ller and Thomas Frederichs and Thorsten Bauersachs and Werner Ehrmann and Tina van de Flierdt and P. S. Pereira and Robert D. Larter and Gerrit Lohmann and Igor Niezgodzki and Gabriele Uenzelmann‐Neben and Maximilian Zundel and Cornelia Spiegel and Chris Mark and David M. Chew and Jane E. Francis and Gernot Nehrke and Florian Schwarz and James A. Smith and Tim Freudenthal and Oliver Esper and Heiko P{\"a}like and Thomas A. Ronge and Ricarda Dziadek and V. J. E. B. C. K. K. Y. F. M. Afanasyeva Arndt Ebermann Gebhardt Hochmuth K{\"u}ssne and Victoria Afanasyeva and Jan Erik Arndt and Benjamin Ebermann and Catalina Gebhardt and Katharina Hochmuth and Kevin K{\"u}ssner and Yani Najman and Florian Riefstahl and Mirko Scheinert},
The mid-Cretaceous period was one of the warmest intervals of the past 140 million years 1 – 5 , driven by atmospheric carbon dioxide levels of around 1,000 parts per million by volume 6 . In the near absence of proximal geological records from south of the Antarctic Circle, it is disputed whether polar ice could exist under such environmental conditions. Here we use a sedimentary sequence recovered from the West Antarctic shelf—the southernmost Cretaceous record reported so far—and show that a… 

Evidence for a Highly Dynamic West Antarctic Ice Sheet During the Pliocene

Major ice loss in the Amundsen Sea sector of the West Antarctic Ice Sheet (WAIS) is hypothesized to have triggered ice sheet collapses during past warm periods such as those in the Pliocene.

A large West Antarctic Ice Sheet explains early Neogene sea-level amplitude.

Geochemical and petrographic data show glacimarine sediments recovered at International Ocean Discovery Program Site U1521 in the central Ross Sea derive from West Antarctica, requiring the presence of a large West Antarctic Ice Sheet covering most of the Ross Sea continental shelf.

The warm winter paradox in the Pliocene northern high latitudes

Abstract. Reconciling palaeodata with model simulations of the Pliocene climate is essential for understanding a world with atmospheric CO2 concentration near 400 ppmv (parts per million by volume).

Impact of global cooling on Early Cretaceous high pCO2 world during the Weissert Event

Modelling, high-resolution bulk organic carbon isotopes and chronostratigraphically calibrated sea surface temperature (SSTs) based on an organic paleothermometer (the TEX86 proxy) confirm a 3.0 °C global mean surface cooling across the Weissert Event, which translates into a ~40% drop in atmospheric pCO2 over a period of ~700 thousand years.

Eocene to Oligocene vegetation and climate in the Tasmanian Gateway region were controlled by changes in ocean currents and <i>p</i>CO<sub>2</sub>

Abstract. Considered one of the most significant climate reorganizations of the Cenozoic period, the Eocene–Oligocene Transition (EOT; ca. 34.44–33.65) is characterized by global cooling and the

The Sabrina Microfloras of East Antarctica: Late Cretaceous, Paleogene or Reworked?

  • M. Macphail
  • Geography, Environmental Science
  • 2021
ABSTRACT The published latest Palaeocene to Early–Middle Eocene age limits of the Sabrina microfloras, offshore Aurora Subglacial Basin, East Antarctica, largely depend on 1970s age-range data for

Vegetation change across the Drake Passage region linked to late Eocene cooling and glacial disturbance after the Eocene–Oligocene Transition

Abstract. The role and climatic impact of the opening of the Drake Passage and how it affected both marine and terrestrial environments across the Eocene-Oligocene Transition (EOT ~ 34 Ma) period

The Warm Winter Paradox in the Pliocene High Latitudes

Abstract. Reconciling palaeodata with model simulations of the Pliocene climate is essential for understanding a world with atmospheric CO2 concentration near 400 parts per million by volume. Both

Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition

The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves.



Persistent near-tropical warmth on the Antarctic continent during the early Eocene epoch

It is shown that the climate in lowland settings along the Wilkes Land coast (at a palaeolatitude of about 70° south) supported the growth of highly diverse, near-tropical forests characterized by mesothermal to megathermal floral elements including palms and Bombacoideae.

The rise and fall of the Cretaceous Hot Greenhouse climate

Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse

The Turonian was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C, and high-amplitude sea-level changes and positive δ18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of extreme warmth.

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

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

High temperatures in the Late Cretaceous Arctic Ocean

Arctic palaeotemperatures from these Upper Cretaceous deposits are determined using TEX86, a new palaeothermometer that is based on the composition of membrane lipids derived from a ubiquitous component of marine plankton, Crenarchaeota, and infer an average sea surface temperature of ∼15 °C for the Arctic Ocean about 70 million years ago.

Antarctic subtropical humid episode at the Paleocene-Eocene boundary: Clay-mineral evidence

Clay-mineral assemblages from East Antarctica have been analyzed at high stratigraphic resolution (20 to 1 ka) throughout the interval from 55.6 to 55.0 Ma, which includes the terminal Paleocene

Evidence for ice-free summers in the late Miocene central Arctic Ocean

The presence of IP25 as a proxy for spring sea-ice cover and alkenone-based summer sea-surface temperatures >4 °C that support a seasonal sea- ice cover with an ice-free summer season being predominant during the late Miocene in the central Arctic Ocean is documented.

100 Million Years of Antarctic Climate Evolution: Evidence from Fossil Plants

The evolution of Antarctic climate from a Cretaceous greenhouse into the Neogene icehouse is captured within a rich record of fossil leaves, wood, pollen, and flowers from the Antarctic Peninsula and

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.