noaa-ocean-14588
Cariaco Basin and Arabian Sea Sediment Reflectance Data Over the Last 100,000 Years
Deplazes, G.; Lückge, A.; Peterson, L.C.; Timmermann, A.; Hamann, Y.; Hughen, K.A.; Röhl, U.; Laj, C.; Cane, M.A.; Sigman, D.M.; Haug, G.H.
Cariaco Basin and Arabian Sea Sediment Reflectance Data Over the Last 100,000 Years
2013-06-19
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/14588
Investigator
G.
Deplazes
Investigator
A.
Lückge
Investigator
L.C.
Peterson
Investigator
A.
Timmermann
Investigator
Y.
Hamann
Investigator
K.A.
Hughen
Investigator
U.
Röhl
Investigator
C.
Laj
Investigator
M.A.
Cane
Investigator
D.M.
Sigman
Investigator
G.H.
Haug
earth science
paleoclimate
paleoceanography
depth,null,null,meter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,meter,null,paleoceanography,corrected,null,N,null
earth science
paleoclimate
paleoceanography
reflectance,sediment,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
physical properties
geoscientificInformation
Dansgaard-Oeschger cycles
Intertropical Convergence Zone (ITCZ)
109200 cal yr BP
1740 cal yr BP
Complete
10.67817
23.12233
-64.9715
66.49722
-847
-571
Ocean
Indian Ocean
Arabian Sea
SO130-289KL>LATITUDE 23.12233>LONGITUDE 66.49722
Ocean
Atlantic Ocean
North Atlantic Ocean
MD03-2621>LATITUDE 10.67817>LONGITUDE -64.9715
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Deplazes, G., Lückge, A., Peterson, L.C., Timmermann, A., Hamann, Y., Hughen, K.A., Röhl, U., Laj, C., Cane, M.A., Sigman, D.M. and Haug, G.H. 2013. Links between tropical rainfall and North Atlantic climate during the last glacial period. Nature Geoscience, 6, 213-217. DOI: 10.1038/ngeo1712.
During the last glacial period, the North Atlantic region experienced pronounced, millennial-scale alternations between cold, stadial conditions and milder interstadial conditions—commonly referred to as Dansgaard-Oeschger oscillations - as well as periods of massive iceberg discharge known as Heinrich events. Changes in Northern Hemisphere temperature, as recorded in Greenland, are thought to have affected the location of the Atlantic inter tropical convergence zone and the strength of the Indian summer monsoon. Here we use high-resolution records of sediment color - a measure of terrigenous versus biogenic content - from the Cariaco Basin off the coast of Venezuela and the Arabian Sea to assess teleconnections with the North Atlantic climate system during the last glacial period. The Cariaco record indicates that the intertropical convergence zone migrated seasonally over the site during mild stadial conditions, but was permanently displaced south of the basin during peak stadials and Heinrich events. In the Arabian Sea, we find evidence of a weak Indian summer monsoon during the stadial events. The tropical records show a more variable response to North Atlantic cooling than the Greenland temperature records. We therefore suggest that Greenland climate is especially sensitive to variations in the North Atlantic system - in particular sea-ice extent - whereas the intertropical convergence zone and Indian monsoon system respond primarily to variations in mean Northern Hemisphere temperature.
STUDY NOTES: Sediment total reflectance, L*, was measured in transects from digital images of the sediment surface with a down-core resolution of ~70 μm (143- 146 pixels/cm). The age model is based on cross-correlation to 14C-dated cores from the same region and by correlating the L* records to the ice-core d18O record of NGRIP using the extended GICC05 age scale.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/deplazes2013/deplazes2013-cariaco.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/deplazes2013/deplazes2013-arabian.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/deplazes2013/SO130-289KL_SedimentImages_Reflectance.pdf
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/deplazes2013/MD03-2621_SedimentImages_Reflectance.pdf
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11