noaa-ocean-12277
North Atlantic Holocene Sortable Silt Grain Size Data
Hoogakker, B.A.A.; Chapman, M.R.; McCave, I.N.; Hillaire-Marcel, C.; Ellison, C.R.W; Hall, I.R.; Telford, R.J.
North Atlantic Holocene Sortable Silt Grain Size Data
2011-11-22
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12277
Investigator
B.A.A.
Hoogakker
Investigator
M.R.
Chapman
Investigator
I.N.
McCave
Investigator
C.
Hillaire-Marcel
Investigator
C.R.W
Ellison
Investigator
I.R.
Hall
Investigator
R.J.
Telford
earth science
paleoclimate
paleoceanography
grain size mean,null,null,micrometer,null,paleoceanography,null,null,N,carbonate and opal free; 10-63 mcm fraction
earth science
paleoclimate
paleoceanography
delta 18O,Cibicidoides wuellerstorfi,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 13C,Cibicidoides wuellerstorfi,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,composited,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,Cibicidoides wuellerstorfi,null,per mil,null,paleoceanography,corrected,null,N,plus 0.64
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth at sample start,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth at sample end,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
lithology
geoscientificInformation
Meridional Overturning Circulation (MOC)
10116 cal yr BP
16 cal yr BP
Complete
50.208
57.458
-45.688
-14.7
-2620
3448
Ocean
Atlantic Ocean
North Atlantic Ocean
MD95-2024>LATITUDE 50.208>LONGITUDE -45.688
Ocean
Atlantic Ocean
North Atlantic Ocean
ODP 980>LATITUDE 55.48>LONGITUDE -14.7
Ocean
Atlantic Ocean
North Atlantic Ocean
MD99-2251>LATITUDE 57.458>LONGITUDE -27.913
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
Hoogakker, B.A.A., M.R. Chapman, I.N. McCave, C. Hillaire-Marcel,
C.R.W. Ellison, I.R. Hall, and R.J. Telford. 2011.
Dynamics of North Atlantic Deep Water masses during the Holocene.
Paleoceanography, Vol. 26, PA4214, doi:10.1029/2011PA002155.
High resolution flow speed reconstructions of two core sites
located on Gardar Drift in the northeast Atlantic Basin
and Orphan Knoll in the northwest Atlantic Basin reveal
a long-term decrease in flow speed of Northeast Atlantic
Deep Water (NEADW) after 6,500 years. Benthic foraminiferal
oxygen isotopes of sites currently bathed in NEADW show
a 0.2‰ depletion after 6,500 years, shortly after the start
of the development of a carbon isotope gradient between
NEADW and Norwegian Sea Deep Water. We consider these
changes in near-bottom flow vigor and benthic foraminiferal
isotope records to mark a significant reorganization of the
Holocene deep ocean circulation, and attribute the changes
to a weakening of NEADW flow during the mid to late Holocene
that allowed the shoaling of Lower Deep Water and deeper
eastward advection of Labrador Sea Water into the northeast
Atlantic Basin.
STUDY NOTES: Sortable silt grain sizes data for box core HU91 045 093 HR
and piston core MD95 2024 from Orphan Knoll in the Labrador
Sea, and piston core MD99 2251 from Gardar Drift. At both
sites sortable silt grain sizes were measured (mean grain
size of the carbonate and opal free 10-63 um fraction),
and for the site in the Labrador Sea benthic foraminiferal
oxygen isotopes (epifaunal Cibicidoides wuellerstorfi)
were also measured.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoogakker2011/hoogakker2011.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoogakker2011/hoogakker2011.xls
USA/NOAA
DIF
Version 9.8.4
2019-06-07
2019-06-07