noaa-ocean-5589
Southern Ocean Midlatitude 160KYr Alkenone SST Reconstructions
Pahnke, K.; Sachs, J.P.
Southern Ocean Midlatitude 160KYr Alkenone SST Reconstructions
2006-07-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/5589
Investigator
K.
Pahnke
Investigator
J.P.
Sachs
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Prahl et al. 1988 calibration
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,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
climate reconstructions|paleoceanography
sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Sikes and Volkman 1993 calibration
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
biomarkers
earth science
paleoclimate
paleocean
reconstruction
earth science
paleoclimate
paleocean
age control
geoscientificInformation
Sea Surface Temperature Reconstruction
156360 cal yr BP
1951 cal yr BP
Complete
-45.53
-40.37
174.93
177.98
-3014
-1210
Ocean
Pacific Ocean
South Pacific Ocean
MD97-2121>LATITUDE -40.37>LONGITUDE 177.98
Ocean
Pacific Ocean
South Pacific Ocean
MD97-2120>LATITUDE -45.53>LONGITUDE 174.93
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
Pahnke, K., and J.P. Sachs. 2006. Sea surface temperatures of southern midlatitudes 0-160 kyr B.P. Paleoceanography, 21, PA2003.
Late Quaternary climate fluctuated between extremes of glaciations, lasting ~90 kyr on average, and interglacial episodes, lasting ~10 kyr. Still largely unknown are the spatial and temporal evolution of these global climate states, with vigorous debate still underway on the mechanisms responsible for glacial inceptions and terminations. Though it is widely believed that the Southern Hemisphere oceans play a central role in global climate changes, few paleoclimate records exist from there. Here we present three new alkenone-derived SST records from the midlatitude Southern Hemisphere spanning the last 160 kyr, a full glacial-interglacial cycle. Our subtropical SST records from the last glacial period are characterized by (1) warming 47ŋ23 kyr B.P., when high latitudes in both hemispheres cooled, and (2) milder temperatures during the penultimate glacial period than during the last glacial interval. These SST features are found to be of tropical- to subtropical-wide extent, implying increased thermal gradients at times of high-latitude ice sheet growth. This has implications for the vigor of atmospheric and upper ocean circulation and the transport of heat and moisture to the poles that may have been instrumental in the growth and maintenance of polar ice sheets during glacial periods.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m97-2121-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m97-2120-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pahnke2006
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11