Abrupt deep-sea warming at the end of the Cretaceous

  title={Abrupt deep-sea warming at the end of the Cretaceous},
  author={Liangquan Li and Gerta Keller},
Climatic and oceanographic variations during the last 2 m.y. of the Maastrichtian inferred from high-resolution (10 k.y.) stable isotope analysis of the mid-latitude South Atlantic Deep Sea Drilling Project Site 525 reveal a major warm pulse followed by rapid cooling prior to the Cretaceous-Tertiary boundary. Between 66.85 and 65.52 Ma, cool but fluctuating temperatures average 9.9 and 15.4 °C in intermediate and surface waters, respectively. This interval is followed by an abrupt short-term… Expand

Figures and Tables from this paper

Variability in Late Cretaceous climate and deep waters: evidence from stable isotopes
Abstract Strong climatic and temperature fluctuations mark the Late Campanian and Maastrichtian as indicated by stable isotope records from the equatorial Pacific (Site 463) and middle and highExpand
Late Cretaceous (late Campanian–Maastrichtian) sea-surface temperature record of the Boreal Chalk Sea
Abstract. The last 8 Myr of the Cretaceous greenhouse interval were characterized by a progressive global cooling with superimposed cool/warm fluctuations. The mechanisms responsible for theseExpand
Major intensification of Atlantic overturning circulation at the onset of Paleogene greenhouse warmth
It is proposed that this intensification of Atlantic overturning circulation in concert with increased atmospheric CO2 from continental rifting marked a climatic tipping point contributing to a more efficient distribution of heat over the planet. Expand
Early to Late Maastrichtian environmental changes in the Indian Ocean compared with Tethys and South Atlantic
Abstract Planktic foraminiferal analysis, including species populations, diversity trends, high-stress indices and stable isotopes of the latest Campanian through Maastrichtian in the South Atlantic,Expand
Upheavals during the Late Maastrichtian: Volcanism, climate and faunal events preceding the end-Cretaceous mass extinction
Abstract The late Maastrichtian was a time of major climate, evolution and extinction extremes. Rapid climate warming of 2–3 °C in intermediate waters between 69.5 and 68 Ma (top C31r to base C30n)Expand
Early Maastrichtian stable isotopes: Changing deep water sources in the North Atlantic?
We propose that the observed short-term stable isotope fluctuations reflect changes in high- and low-latitude intermediate to deep water sources, based on a high-resolution stable isotope record ofExpand
Latest Cretaceous climatic and environmental change in the South Atlantic region
Latest Maastrichtian climate change caused by Deccan volcanism has been invoked as a cause of mass extinction at the Cretaceous-Paleogene (K-Pg) boundary (~66.0 Ma). Yet late Maastrichtian climateExpand
Mid-latitude terrestrial climate of East Asia linked to global climate in the Late Cretaceous: REPLY
The Late Cretaceous (late Campanian to Maastrichtian) was characterized by a variable greenhouse climate, with evidence for cooling and/or glaciation and warming events. Most of these climaticExpand
Late Cretaceous to early Paleocene climate and sea-level fluctuations: the Tunisian record
Abstract Climate and sea-level fluctuations across the Cretaceous–Tertiary (K–T) transition in Tunisia were examined based on bulk rock and clay mineralogies, biostratigraphy and lithology in fiveExpand
Correlated terrestrial and marine evidence for global climate changes before mass extinction at the Cretaceous–Paleogene boundary
Paleotemperatures for the last ≈1.1 million years of the Cretaceous are estimated by using fossil plants from North Dakota and employ paleomagnetic stratigraphy to correlate the results to foraminiferal paleoclimatic data from four middle- and high-latitude sites, suggesting a coupling of pCO2 and temperature. Expand


Global environmental changes preceding the Cretaceous-Tertiary boundary: Early-late Maastrichtian transition
Stable carbon, oxygen, and strontium isotope data from Maastrichtian planktic and benthic foraminifera from southern high-latitude Ocean Drilling Program Sites 690, 750, and 761 reveal major changesExpand
Paleotemperature History of the Cenozoic and the Initiation of Antarctic Glaciation: Oxygen and Carbon Isotope Analyses in DSDP Sites 277, 279 and 281
An oxygen and carbon isotopic history based on analyses of benthonic and planktonic foraminifera in three overlapping subantarctic sections is presented for the last 55 m.y. with a sampling intervalExpand
Evidence for thermohaline-circulation reversals controlled by sea-level change in the latest Cretaceous
Fluctuations in oxygen (δ 18 O) and carbon (δ 13 C) isotope values of benthic foraminiferal calcite from the tropical Pacific and Southern Oceans indicate rapid reversals in the dominant mode andExpand
Stable isotope and foraminiferal changes across the Cretaceous-Tertiary boundary at Stevns Klint, Denmark : arguments for long-term oceanic instability before and after bolide-impact event
Abstract Stable isotope and planktic and benthic foraminiferal analyses of the K/T boundary transition at Stevens Klint, Denmark, indicate a 100–500 kyr long period of instability in oceanicExpand
Geochemical evidence for suppression of pelagic marine productivity at the Cretaceous/Tertiary boundary
The normal, biologically productive ocean is characterized by a gradient of the 13C/12C ratio from surface to deep waters. Here we present stable isotope data from planktonic and benthicExpand
Gradual mass extinction, species survivorship, and long-term environmental changes across the Cretaceous-Tertiary boundary in high latitudes
Stable-isotope and planktic foraminiferal analyses across the Cretaceous/Tertiary (K/T) boundary transition at Nye Klov indicate longterm oceanic instability associated with global sea-levelExpand
Late Cretaceous Oceans and the Cool Tropic Paradox
Oxygen isotopic proxies of paleo-sea surface temperatures (SSTs) suggest that Maastrichtian (about 66 million years ago) tropical SSTs were lower than those of today. They also demonstrate thatExpand
The Paleoceanographic and Paleoclimatic Signature of the Cretaceous/Paleogene Boundary in the Antarctic: Stable Isotopic Results from ODP Leg 113
Stable isotopic records across the Cretaceous/Paleogene (K/P) boundary in Maud Rise Holes 689B and 690C indi­ cate that significant climatic changes occurred during the latest Cretaceous, beginningExpand
The Cretaceous-Tertiary boundary transition in the Antarctic Ocean and its global implications
Abstract Three Antarctic Ocean K/T boundary sequences from ODP Site 738C on the Kerguelen Plateau, ODP Site, 752B on Broken Ridge and ODP Site 690C on Maud Rise, Weddell Sea, have been analyzed forExpand
Maastrichtian climate, productivity and faunal turnovers in planktic foraminifera in South Atlantic DSDP sites 525A and 21
Abstract Stratigraphic, faunal and isotopic analyses of the Maastrichtian at DSDP sites 525A and 21 in the South Atlantic reveal a planktic foraminiferal fauna characterized by two major events, anExpand