Towards a North Atlantic Plio-Pleistocene sediment color climate index

Author(s): Obrochta, Stephen; Bailey, I.; Channell, J. E. T.; Hodell, David A.; Timmermann, Axel; Tyler, J. J.; Xuan, C.; Yokoyama, Y.
Author Affiliation(s): Primary:
Akita University, Akita, Japan
Other:
University of Exeter, United Kingdom
University of Florida, United States
University of Cambridge, United Kingdom
University of Hawaii at Manoa, United States
University of Adelaide, Australia
University of Southampton, United Kingdom
University of Tokyo, Japan
Volume Title: AGU 2015 fall meeting
Source: American Geophysical Union Fall Meeting, Vol.2015; American Geophysical Union 2015 fall meeting, San Francisco, CA, Dec. 14-18, 2015. Publisher: American Geophysical Union, Washington, DC, United States
Note: In English
Summary: Sediment color variations at North Atlantic Site DSDP609/U1308 exhibit a very similar pattern to the water isotope record of the North GRIP ice core. Moving window cross correlation between NGRIP δ18O and sediment lightness (L*) reveals a consistently high and significant correlation. Based on this relationship, we construct a color-based climate index by calculating color reflectance values from the shipboard line-scanner images. Use of the line-scanner images provides a higher-resolution series (0.01 cm) than the 2-cm shipboard spectrophotometer data and permits for manual removal of disturbed pixels prior to analysis. At present, the composite benthic δ18O record at Site U1308 extends to MIS K2, providing age control beyond 3 Ma. Thus, we expect this to yield a near-continuous, centennial-scale record of 41-ky world interstadial-stadial variability back to Northern Hemisphere glacial inception.
Year of Publication: 2015
Research Program: DSDP Deep Sea Drilling Project
IODP Integrated Ocean Drilling Program
IPOD International Phase of Ocean Drilling
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Cenozoic; Climate change; Cores; DSDP Site 609; Deep Sea Drilling Project; Expedition 303; Expeditions 303/306; IODP Site U1308; IPOD; Integrated Ocean Drilling Program; Leg 94; Marine sediments; Mid-Atlantic Ridge; Neogene; North Atlantic; Northeast Atlantic; Paleoclimatology; Pleistocene; Pliocene; Quaternary; Sediments; Tertiary
Coordinates: N495240 N495241 W0241417 W0241418
N495300 N495300 W0241400 W0241400
Record ID: 2016060092
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