Low-latitude climate variability in the Heinrich frequency band of the Late Cretaceous greenhouse world

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doi: 10.5194/cp-10-1-2014
Author(s): de Winter, N. J.; Zeeden, C.; Hilgen, F. J.
Author Affiliation(s): Primary:
Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Volume Title: Climate of the Past
Source: Climate of the Past, 10(3), p.1001-1015. Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1814-9324
Note: In English. 66 refs.; illus.
Summary: Deep marine successions of early Campanian age from DSDP (Deep Sea Drilling Project) site 516F drilled at low paleolatitudes in the South Atlantic reveal distinct sub-Milankovitch variability in addition to precession, obliquity and eccentricity-related variations. Elemental abundance ratios point to a similar climatic origin for these variations and exclude a quadripartite structure as an explanation for the inferred semi-precession cyclicity in the magnetic susceptibility (MS) signal as observed in the Mediterranean Neogene for precession-related cycles. However, semi-precession cycles as suggested by previous work are likely an artifact reflecting the first harmonic of the precession signal. The sub-Milankovitch variability, especially in MS, is best approximated by a ∼7 kyr cycle as shown by spectral analysis and bandpass filtering. The presence of sub-Milankovitch cycles with a period similar to that of Heinrich events of the last glacial cycle is consistent with linking the latter to low-latitude climate change caused by a non-linear response to precession-induced variations in insolation between the tropics.
Year of Publication: 2014
Research Program: DSDP Deep Sea Drilling Project
IODP Integrated Ocean Drilling Program
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Blake Nose; Blake Plateau; Carbonate platforms; Carbonates; Chemical analysis; Chemical composition; Chemical elements; Climate change; Climate forcing; Concentration; Cores; Cretaceous; Cycles; Cyclic processes; Cyclostratigraphy; DSDP Site 516; Data processing; Deep Sea Drilling Project; Eccentricity; Expedition 303; Expeditions 303/306; Fluctuations; Frequency; Glaciation; Greenhouse effect; Heinrich events; IPOD; Insolation; Integrated Ocean Drilling Program; Leg 162; Leg 171A; Leg 171B; Leg 72; Magnetic properties; Magnetic susceptibility; Magnetostratigraphy; Mesozoic; Milankovitch theory; North Atlantic; Obliquity of the ecliptic; Ocean Drilling Program; Orbital forcing; Paleoclimatology; Paleolatitude; Paleomagnetism; Passband filters; Periodicity; Precession; Quadruplet structure; Rio Grande Rise; Sedimentation; Sedimentation rates; Semi-precession; South Atlantic; Spectra; Spectral analysis; Spectrophotometry; Statistical analysis; Succession; Terrestrial sedimentation; Time series analysis; Upper Cretaceous; Wavelets; X-ray fluorescence spectra
Coordinates: S301700 S301700 W0351700 W0351700
Record ID: 2015062059
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany