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MacLeod, Kenneth G; Huber, Brian T; Isaza-Londoño, Carolina (2005): Strontium and oxygen isotope data for DSDP Hole 44-390A and ODP Leg 171 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.722600, Supplement to: MacLeod, KG et al. (2005): North Atlantic warming during global cooling at the end of the Cretaceous. Geology, 33(6), 437-440, https://doi.org/10.1130/G21466.1

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Abstract:
Differences in regional responses to climate fluctuations are well documented on short time scales (e.g., El Niño-Southern Oscillation), but with the exception of latitudinal temperature gradients, regional patterns are seldom considered in discussions of ancient greenhouse climates. Contrary to the expectation of global warming or global cooling implicit in most treatments of climate evolution over millions of years, this paper shows that the North Atlantic warmed by as much as 6°C (1.5% decrease in d18O values of planktic foraminifera) during the Maastrichtian global cooling interval. We suggest that warming was the result of the importation of heat from the South Atlantic. Decreasing North Atlantic d18O values are also associated with increasing gradients in planktic d13C values, suggesting increasing surface-water stratification and a correlated strengthening of the North Atlantic Polar Front. If correct, this conclusion predicts arctic cooling during the late Maastrichtian. Beyond implications for the Maastrichtian, these data demonstrate that climate does not behave as if there is a simple global thermostat, even on geologic time scales.
Other version:
GSA data repository - Age model - accompanying manuscript
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 30.064498 * Median Longitude: -76.324658 * South-bound Latitude: 29.951300 * West-bound Longitude: -76.626800 * North-bound Latitude: 30.142300 * East-bound Longitude: -76.112110
Date/Time Start: 1975-08-29T00:00:00 * Date/Time End: 1997-02-08T19:30:00
Event(s):
44-390A * Latitude: 30.142300 * Longitude: -76.112300 * Date/Time: 1975-08-29T00:00:00 * Elevation: -2665.0 m * Penetration: 142.5 m * Recovery: 86.3 m * Location: North Atlantic * Campaign: Leg44 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 133 m cored; 0 m drilled; 64.9 % recovery
171-1049C * Latitude: 30.142270 * Longitude: -76.112110 * Date/Time: 1997-01-16T00:30:00 * Elevation: -2670.8 m * Penetration: 158.5 m * Recovery: 88.86 m * Location: Blake Nose, North Atlantic Ocean * Campaign: Leg171B * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 111.5 m cored; 47 m drilled; 79.7 % recovery
171-1050C * Latitude: 30.099910 * Longitude: -76.234970 * Date/Time: 1997-02-08T19:30:00 * Elevation: -2296.5 m * Penetration: 606 m * Recovery: 200.19 m * Location: Blake Nose, North Atlantic Ocean * Campaign: Leg171B * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 288.5 m cored; 317.5 m drilled; 69.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. MacLeod, KG; Huber, BT; Isaza-Londoño, C (2005): (Table 2) Strontium isotopic data for ODP Hole 171-1049C. https://doi.org/10.1594/PANGAEA.722594
  2. MacLeod, KG; Huber, BT; Isaza-Londoño, C (2005): (Table 2) Strontium isotopic data for ODP Hole 171-1050C. https://doi.org/10.1594/PANGAEA.722595
  3. MacLeod, KG; Huber, BT; Isaza-Londoño, C (2005): (Table 2) Strontium isotopic data for ODP Hole 171-1052E. https://doi.org/10.1594/PANGAEA.722596
  4. MacLeod, KG; Huber, BT; Isaza-Londoño, C (2005): (Table DR1) Oxygen isotope data for planktonic and benthic foraminifera from DSDP Hole 44-390A. https://doi.org/10.1594/PANGAEA.722597
  5. MacLeod, KG; Huber, BT; Isaza-Londoño, C (2005): (Table DR2) Oxygen isotope data for planktonic and benthic foraminifera and bulk carbonate from ODP Hole 171-1050C. https://doi.org/10.1594/PANGAEA.722598
  6. MacLeod, KG; Huber, BT; Isaza-Londoño, C (2005): (Table DR3) Oxygen isotope data for planktonic and benthic foraminifera and bulk carbonate from ODP Hole 171-1052E. https://doi.org/10.1594/PANGAEA.722599