noaa-ocean-12362
Western Arctic Ocean 8KYr BWT and Sea Ice Reconstructions
Farmer, J.R.; Cronin, T.M.; de Vernal, A.; Dwyer, G.S.; Keigwin, L.D.; Thunell, R.C.
Western Arctic Ocean 8KYr BWT and Sea Ice Reconstructions
2012-01-05
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12362
Investigator
J.R.
Farmer
Investigator
T.M.
Cronin
Investigator
A.
de Vernal
Investigator
G.S.
Dwyer
Investigator
L.D.
Keigwin
Investigator
R.C.
Thunell
earth science
paleoclimate
climate reconstructions|paleoceanography
sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,bottom water temperature from Islandiella helenae
earth science
paleoclimate
climate reconstructions|paleoceanography
sea ice cover,dinoflagellate assemblage,null,month,null,climate reconstructions|paleoceanography,null,null,N,month per year
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,benthic foraminifer,null,per mil VPDB,null,paleoceanography,null,null,N,Islandiella helenae
earth science
paleoclimate
paleoceanography
magnesium/calcium,ostracod,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,bottom water temperature from Nonionella labradorica
earth science
paleoclimate
climate reconstructions|paleoceanography
sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,bottom water temperature from Krithe glacialis
earth science
paleoclimate
paleoceanography
delta 18O,benthic foraminifer,null,per mil VPDB,null,paleoceanography,null,null,N,Nonionella labradorica
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
geochemistry
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
reconstruction
geoscientificInformation
Meridional Overturning Circulation (MOC)
Sea Ice Reconstruction
sea ice
8100 cal yr BP
52 cal yr BP
Complete
72.1555
73.7067
-162.7433
-155.5082
-369
-203
Ocean
Arctic Ocean
HLY0205-GGC19>LATITUDE 72.1555>LONGITUDE -155.5082
Ocean
Arctic Ocean
P1-92AR-P1/B3>LATITUDE 73.7067>LONGITUDE -162.7433
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
Farmer, J.R., T.M. Cronin, A. de Vernal, G.S. Dwyer, L.D. Keigwin,
and R.C. Thunell. 2011.
Western Arctic Ocean temperature variability during the last 8000 years.
Geophysical Research Letters, Vol. 38, L24602, doi:10.1029/2011GL049714.
We reconstructed subsurface (~200-400 m) ocean temperature
and sea-ice cover in the Canada Basin, western Arctic Ocean
from foraminiferal d18O, ostracode Mg/Ca ratios, and dinocyst
assemblages from two sediment core records covering the last
8000 years. Results show mean temperature varied from -1 to 0.5°C
and -0.5 to 1.5°C at 203 and 369 m water depths, respectively.
Centennial-scale warm periods in subsurface temperature records
correspond to reductions in summer sea-ice cover inferred from
dinocyst assemblages around 6.5 ka, 3.5 ka, 1.8 ka and during
the 15th century Common Era. These changes may reflect centennial
changes in the temperature and/or strength of inflowing Atlantic
Layer water originating in the eastern Arctic Ocean. By comparison,
the 0.5 to 0.7°C warm temperature anomaly identified in oceanographic
records from the Atlantic Layer of the Canada Basin exceeded
reconstructed Atlantic Layer temperatures for the last 1200 years
by about 0.5°C.
STUDY NOTES: We reconstructed subsurface ocean temperature and surface sea-ice
duration at centennial to submillenial-scale resolution from cores
HLY0205-GGC19 and P1-92AR-P1/B3 in the Canada Basin, Arctic Ocean.
Oxygen isotopic composition of benthic foraminifers and magnesium
to calcium (Mg/Ca) ratios in ostracodes were used as temperature
proxies, with sea-ice duration interpreted from dinocyst assemblages.
Chronology for both cores was established with radiocarbon dating
Data Include:
1. 14C chronology for both cores
2. GGC19 bottom water temperature from d18O of benthic
foraminifer Islandiella helenae
3. GGC19 bottom water temperature from d18O of benthic
foraminifer Nonion labradoricum
4. GGC19 sea-ice duration (months/year) from dinocyst assemblages
5. P1/B3 ostracode Mg/Ca and BWT, and sea-ice duration
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/farmer2011/farmer2011.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/farmer2011/farmer2011.xls
USA/NOAA
DIF
Version 9.8.4
2019-04-22
2019-04-22