| PALEOCEANOGRAPHY |
North Iceland Shelf (MD99-2269) Holocene Quartz and Grain Size Data
|
|
Moros M., J.T. Andrews, D.D. Eberl, E. Jansen. 2006. Holocene history of drift ice in the northern North Atlantic: Evidence
for different spatial and temporal modes. Paleoceanography, 21, PA2017.
| Data Coverage |
North: 66.63 * South: 66.63 |
|
West: -23.85 * East: -23.85 |
|
Altitude: -365 m |
Start Year: 9950 14C yr BP
* End Year: 12 14C yr BP
Data: Please Cite Data Contributors!
|
|
Summary: We present new high-resolution proxy data for the Holocene history of drift ice off Iceland based on the mineralogy of the
<2-mm sediment fraction using quantitative X-ray diffraction. These new data, bolstered by a comparison with published proxy
records, point to a long-term increasing trend in drift ice input into the North Atlantic from 6 to 5 ka toward the present
day at sites influenced by the cold east Greenland Current. This feature reflects the late Holocene Neoglacial or cooling
period recorded in ice cores and further terrestrial archives on Greenland. In contrast, a decrease in drift ice during the
same period is recorded at sites underlying the North Atlantic Drift, which may reflect a warming of this region. The results
document that Holocene changes in iceberg rafting and sea ice advection did not occur uniformly across the North Atlantic.
Centennial-scale climate variability in the North Atlantic region over the last ~4 kyr is linked to the observed changes in
drift ice input. Increased drift ice may have played a role in the increase of cold intervals during the late Holocene, e.g.,
the Little Ice Age cooling.
More Info on Paleoceanography Data |
|
|
Parameters: Quartz weight percent (> 125 micron); Quartz/Plagioclase ratio; calendar years before 1950AD; Calcium carbonate weight percent; Quartz weight percent; Quartz weight percent (> 63 micron)
|
|
Complete XML Record: noaa-ocean-5595
(Last Revised: 2008-04-10 )
|
|
 |
DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
325 Broadway, E/CC23
Boulder, CO 80305
USA
|
| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
Phone: 303-497-6280
Fax: 303-497-6513
|
|
