noaa-ocean-2628
Southern Ocean Oligocene to early Miocene Paleoceanographic Data
Anderson, L.D.; Delaney, M.L.
Southern Ocean Oligocene to early Miocene Paleoceanographic Data
2005-01-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/2628
Investigator
L.D.
Anderson
Investigator
M.L.
Delaney
earth science
paleoclimate
paleoceanography
barium excess,sediment,null,micromole per gram,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
mineral matter,sediment,null,weight percent,null,paleoceanography,null,null,N,determined as total sediment % minus carbonate % minus biogenic silica %
earth science
paleoclimate
paleoceanography
manganese,sediment,null,micromole per gram,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
biogenic silica,sediment,null,millimole per square centimeter per kiloyear,null,paleoceanography,null,null,N,mass accumulation rate
earth science
paleoclimate
paleoceanography
phosphorus,sediment,null,micromole per gram,null,paleoceanography,null,null,N,reactive
earth science
paleoclimate
paleoceanography
phosphorus,sediment,null,micromole per gram,null,paleoceanography,null,null,N,detrital phosphorus
earth science
paleoclimate
paleoceanography
age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
barium,sediment,null,micromole per gram,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
barium excess,sediment,null,micromole per square centimeter per kiloyear,null,paleoceanography,null,null,N,accum. rate
earth science
paleoclimate
paleoceanography
phosphorus,sediment,null,unspecified unit,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
calcium carbonate,sediment,null,millimole per square centimeter per kiloyear,null,paleoceanography,null,null,N,accum. rate
earth science
paleoclimate
paleoceanography
calcium carbonate,sediment,null,weight percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
uranium,sediment,null,nanomole per gram,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
biogenic silica,sediment,null,weight percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
aluminum,sediment,null,parts per million,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
mineral matter,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,terrigenous sediment mass accumulation rate determined as Total MAR - carbonate MAR - biogenic silica MAR
earth science
paleoclimate
paleoceanography
titanium,sediment,null,micromole per gram,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
geochemistry
earth science
paleoclimate
paleocean
lithology
earth science
paleoclimate
paleocean
physical properties
earth science
paleoclimate
paleocean
age control
geoscientificInformation
29750964 14C yr BP
20120856 14C yr BP
29750964 cal yr BP
20120856 cal yr BP
Complete
-42.908333
-42.908333
8.9
8.9
-3702
-3702
Ocean
Atlantic Ocean
South Atlantic Ocean
ODP 1090>LATITUDE -42.908333>LONGITUDE 8.9
None
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.
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
Anderson, L.D. and M.L. Delaney. 2005. Use of multiproxy records on the Agulhas Ridge, Southern Ocean (Ocean Drilling Project Leg 177, Site 1090) to investigate sub-Antarctic hydrography from the Oligocene to the early Miocene. Paleoceanography 20(3), PA3011. doi:10.1029/2004PA001082
Ocean Drilling Program (ODP) Site 1090, on the Agulhas Ridge in the South Atlantic sector of the Southern Ocean, is ideally located to capture changes in Southern Ocean circulation patterns. Using samples taken from cored sediments, we construct multiproxy records of productivity (biogenic barium (Baex), opal, and CaCO3 mass accumulation rates (MARs)), nutrient and organic carbon burial (reactive phosphorus (Pr) MARs), and redox conditions (U and Mn enrichments) to investigate hydrographic conditions associated with climatic shifts from the Oligocene through the early Miocene. Orbitally induced cyclicity in U and Mn enrichments (100 kyr) suggests shifts in deepwater characteristics. However, CaCO3 dissolution coincident with low U and Mn enrichments does not indicate low-oxygen, corrosive waters similar to modern conditions. These observations indicate that a well developed ""modern-type"" Antarctic Circumpolar Current (ACC) did not yet exist over the period from 30 to 20 Ma, with two potential consequences: The Southern Ocean was not functioning as a silica trap, permitting a broader distribution of silica that may have facilitated organic carbon burial in the ocean in general, and the lack ofa deeply mixing ACC may have facilitated organic carbon burial in the Southern Ocean. Both the relative (high opal MARs coincident with low CaCO3 MARs) and absolute (high Pr MARs) burial of organic carbon suggest a powerful mechanism for pCO2 drawdown.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1090d-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2005b
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11