Project Leader:
sid hem
(sidney@ldeo.columbia.edu)
EI Collaborators:
Steven Goldstein
Additional External Researchers:
Ian Hall (Cardiff University)
Locations: Atlantic Ocean
Special Locations:
Mid-Atlantic Ridge; South Atlantic; North Atlantic
Description:
Funding from ARCHES/CICAR has aided our endeavors in several projects of relevance to rapid climate change. One goal is to study sediment composition and flux of samples along the mid-Atlantic ridge (MAR) to constrain the processes responsible for the distribution, and in the most exciting case, to constrain the position of the ITCZ. This contributes towards our long-term goal to have a map of LGM terrigenous isotope composition for the South Atlantic that is comparable to the Holocene map that exists now. A further goal is continued method development, both for the authigenic ferromanganese and terrigenous detritus components. As mentioned in the year 3-progress report, we have found that not all cores give true marine signals as monitored by the Sr isotope composition of the ferromanganese fraction. We have still not yet solved the problem and will continue the work in year 5. A major shift in the goal for year 4 was a return to the North Atlantic to study high-resolution ocean-atmosphere-ice sheet interaction as well as to characterize major ice rafted detritus (IRD) contributors in the North Atlantic region.
EI Unit:
Lamont-Doherty Earth Observatory (LDEO)
Cross Cutting Themes:
Climate and Society
Core Disciplines:
Earth Sciences
Collaborating Institutions:
Cardiff University
Funding Agency:
NOAA
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