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Orca Basin, Gulf of Mexico MD02-2551 d18O and Mg/Ca Data During the Last Glaciation

Originator:

Hill, H.W.; Flower, B.P.; Quinn, T.M.; Hollander, D.J.; Guilderson, T.P.

Citation Information:

Hill, H.W., B.P. Flower, T.M. Quinn, D.J. Hollander, and T.P. Guilderson. 2006. Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation. Paleoceanography, 21(1), PA1006. doi: 10.1029/2005PA001186

Lat:0, Lon:0

Download Data:

MD02-2551
Alternate Format Data	md2-2551-tab.txt
Original Data and Full Metadata	hill2006

Use Constraints:

Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.

Distributor:

National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce

Resource Description (data set id):

noaa-ocean-2641

Data Coverage:

Latitude: 26.95
Longitude: -91.35
Minimum Elevation: -2248 m
Maximum Elevation: -2248 m
Earliest Year: 44461 cal yr BP (-42511 CE)
Most Recent Year: 23220 cal yr BP (-21270 CE)

Science Keywords:

Other Hydroclimate Reconstruction
Sea Surface Temperature Reconstruction

Parameters:

earth science>paleoclimate>paleocean>age control
earth science>paleoclimate>paleocean>trace metals in carbonates
earth science>paleoclimate>paleocean>reconstruction
earth science>paleoclimate>paleocean>oxygen isotopes

Variables:

data type	what	material	unit	detail	info
PALEOCEANOGRAPHY	age		calendar year before present
CLIMATE RECONSTRUCTIONSPALEOCEANOGRAPHY	delta 18O	sea watermagnesium/calciumdelta 18O	per mil VSMOW
CLIMATE RECONSTRUCTIONSPALEOCEANOGRAPHY	delta 18O	sea watermagnesium/calciumdelta 18O	per mil VSMOW	corrected	corrected for ice volume
PALEOCEANOGRAPHY	delta 18O	Globigerinoides ruber pink	per mil PDB
PALEOCEANOGRAPHY	depth		centimeter
PALEOCEANOGRAPHY	magnesium/calcium	Globigerinoides ruber pink	dimensionless
CLIMATE RECONSTRUCTIONSPALEOCEANOGRAPHY	sea surface temperature	magnesium/calcium	degree Celsius

Summary/Abstract:

A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed fresh water between the Gulf of Mexico (GOM) and the North Atlantic, affecting North Atlantic Deep Water variability and regional climate. Paired measurements of d18O and Mg/Ca of foraminiferal calcite from GOM sediments reveal five episodes of LIS meltwater input from 28 to 45 thousand years ago (ka) that do not match the millennial-scale Dansgaard-Oeschger warmings recorded in Greenland ice. We suggest that summer melting of the LIS may occur during Antarctic warming and likely contributed to sea level variability during marine isotope stage 3.

More Information:

PALEOCEANOGRAPHY

Contact Information:

DOC/NOAA/NESDIS/NCEI

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