noaa-ocean-9775
Southeast Atlantic Holocene and Marine Isotope Stage 11 isotope, alkenone and SST data
Dickson, A.J.; Beer, C.J.; Dempsey, C.; Maslin, M.A.; Bendle, J.A.; McClymont, E.L.; Pancost, R.D.
Southeast Atlantic Holocene and Marine Isotope Stage 11 isotope, alkenone and SST data
2010-09-10
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/9775
Investigator
A.J.
Dickson
Investigator
C.J.
Beer
Investigator
C.
Dempsey
Investigator
M.A.
Maslin
Investigator
J.A.
Bendle
Investigator
E.L.
McClymont
Investigator
R.D.
Pancost
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,null,null,N,bsf
earth science
paleoclimate
paleoceanography
age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,Uvigerina sp.,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,Neogloboquadrina incompta,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|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
alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,Globorotalia truncatulinoides,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,carbonate,null,per mil,null,paleoceanography,null,null,N,on fine fraction carbonate
earth science
paleoclimate
paleoceanography
depth at sample end,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
biomarkers
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
carbon isotopes
earth science
paleoclimate
paleocean
reconstruction
earth science
paleoclimate
paleocean
age control
geoscientificInformation
Meridional Overturning Circulation (MOC)
Sea Surface Temperature Reconstruction
473780 cal yr BP
0 cal yr BP
Complete
-29.37
-28.9833
13.6
13.833333
-1997
-1713
Ocean
Atlantic Ocean
South Atlantic Ocean
GeoB1720-3>LATITUDE -28.9833>LONGITUDE 13.833333
Ocean
Atlantic Ocean
South Atlantic Ocean
GeoB1720-2>LATITUDE -28.9833>LONGITUDE 13.833333
Ocean
Atlantic Ocean
South Atlantic Ocean
ODP 1085>LATITUDE -29.37>LONGITUDE 13.6
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
Dickson, A.J., C.J. Beer, C. Dempsey, M.A. Maslin, J.A. Bendle, E.L. McClymont, and R.D. Pancost. 2009. Oceanic forcing of the Marine Isotope Stage 11 interglacial. Nature Geoscience 2, 428-433.
Dickson, A.J., M.J. Leng, M.A. Maslin, H.J. Sloane, J. Green, J.A. Bendle, E.L. McClymont and R.D. Pancost. 2010. Atlantic overturning circulation and Agulhas leakage influences on southeast Atlantic upper ocean hydrography during marine isotope stage 11. Paleoceanography, 25, PA3208.
Dickson, A.J., M.J. Leng and M.A. Maslin. 2008. Mid-depth South Atlantic Ocean circulation and chemical stratification during MIS-10 to 12: implications for atmospheric CO2. Climate of the Past 4, 333-344.
The interglacial known as Marine Isotope Stage 11 has been proposed to be analogous to the Holocene, owing to similarities in the amplitudes of orbital forcing. It has been difficult to compare the periods, however, because of the long duration of Stage 11 and a lack of detailed knowledge of any extreme climate events that may have occurred. Here we use the distinctive phasing between seasurface temperatures and the oxygen-isotope records of benthic foraminifera in the southeast Atlantic Ocean to stratigraphically align the Holocene interglacial with the first half of the Marine Isotope Stage 11 interglacial optimum. This alignment suggests that the second half of Marine Isotope Stage 11 should not be used as a reference for 'pre-anthropogenic' greenhouse-gas emissions. By compiling benthic carbon-isotope records from sites in the Atlantic Ocean on a single timescale, we also find that meridional overturning circulation strengthened about 415,000 years ago, at a time of high orbital obliquity. We propose that this mechanism transported heat to the high northern latitudes, inhibiting significant ice-sheet build-up and prolonging interglacial conditions. We suggest that this mechanism may have also prolonged other interglacial periods throughout the past 800,000 years.
STUDY NOTES: Depth is cm below sea floor. The age model for Site-1085 was determined by correlation of the benthic delta18O data to the LR04 curve. d18O values have been corrected to a common 'Uvigerina' scale by adding 0.64permil. Some d13C data from Site-1085 are on the basis of measurements of Uvigerina spp. corrected to C. wuellerstorfi values by adding 0.9permil.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/dickson2009/dickson2009.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11