noaa-recon-11933
Global 3Ma Temperature, Sea Level, and Ice Volume Reconstructions
Bintanja, R.; van de Wal, R.S.W.
Global 3Ma Temperature, Sea Level, and Ice Volume Reconstructions
2011-09-12
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11933
Investigator
R.
Bintanja
Investigator
R.S.W.
van de Wal
earth science
paleoclimate
paleoclimatic modeling
age,null,null,calendar kiloyear before present,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet volume,null,null,meter,null,paleoclimatic modeling,null,null,N,Eurasian ice sheet volume in meters of sea level equivalent; anomalized relative to present
earth science
paleoclimate
paleoclimatic modeling
ice sheet volume,null,null,meter,null,paleoclimatic modeling,null,null,N,North American ice sheet volume in meters of sea level equivalent; anomalized relative to present
earth science
paleoclimate
paleoclimatic modeling
delta 18O,sea water,null,per mil,null,paleoclimatic modeling,anomalized,null,N,Marine oxygen isotope value relative to present
earth science
paleoclimate
paleoclimatic modeling
delta 18O,sea water,null,per mil,null,paleoclimatic modeling,anomalized,null,N,"Deep-sea temperature contribution to the marine isotope signal, relative to present"
earth science
paleoclimate
paleoclimatic modeling
land surface temperature,null,null,degree Celsius,null,paleoclimatic modeling,anomalized,null,N,anomalized relative to present
earth science
paleoclimate
paleoclimatic modeling
sea water temperature,null,null,degree Celsius,null,paleoclimatic modeling,anomalized,null,N,deepwater temperature anomalized relative to present
earth science
paleoclimate
paleoclimatic modeling
delta 18O,sea water,null,per mil,null,paleoclimatic modeling,anomalized,null,N,"Ice sheet contribution to the marine isotope signal, relative to present"
earth science
paleoclimate
paleoclimatic modeling
surface air temperature,null,null,degree Celsius,null,paleoclimatic modeling,anomalized,null,N,anomalized relative to present
earth science
paleoclimate
reconstructions
air temperature
earth science
paleoclimate
reconstructions
ice extent
earth science
paleoclimate
reconstructions
sea level
geoscientificInformation
Air Temperature Reconstruction
Sea Level Reconstruction
sea level
3000000 cal yr BP
0 cal yr BP
Complete
-90
90
-180
180
Geographic Region
Global
Global>LATITUDE >LONGITUDE
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
Bintanja, R. and R.S.W. van de Wal. 2008.
North American ice-sheet dynamics and the onset
of 100,000-year glacial cycles.
Nature, Vol. 454, pp. 869-872, 14 August 2008.
doi:10.1038/nature07158
The onset of major glaciations in the Northern Hemisphere
about 2.7 million years ago was most probably induced by
climate cooling during the late Pliocene epoch. These glaciations,
during which the Northern Hemisphere ice sheets successively
expanded and retreated, are superimposed on this long-term
climate trend, and have been linked to variations in the Earth's
orbital parameters. One intriguing problem associated with
orbitally driven glacial cycles is the transition from 41,000-year
to 100,000-year climatic cycles that occurred without an apparent
change in insolation forcing. Several hypotheses have been proposed
to explain the transition, both including and excluding ice-sheet
dynamics. Difficulties in finding a conclusive answer to this
palaeoclimatic problem are related to the lack of sufficiently long
records of ice-sheet volume or sea level. Here we use a comprehensive
ice-sheet model and a simple ocean-temperature model to extract
three-million-year mutually consistent records of surface air
temperature, ice volume and sea level from marine benthic oxygen
isotopes. Although these records and their relative phasings
are subject to considerable uncertainty owing to limited availability
of palaeoclimate constraints, the results suggest that the gradual
emergence of the 100,000-year cycles can be attributed to the
increased ability of the merged North American ice sheets to survive
insolation maxima and reach continental-scale size. The oversized,
wet-based ice sheet probably responded to the subsequent insolation
maximum by rapid thinning through increased basal-sliding,
thereby initiating a glacial termination. Based on our assessment
of the temporal changes in air temperature and ice volume during
individual glacials, we demonstrate the importance of ice dynamics
and ice-climate interactions in establishing the 100,000-year
glacial cycles, with enhanced North American ice sheet growth
and the subsequent merging of the ice sheets being key elements.
STUDY NOTES: A comprehensive ice-sheet model and a simple ocean-temperature
model were applied to marine benthic oxygen isotopes (LR04 stack)
to extract three-million-year mutually consistent records of
surface air temperature, ice volume, and sea level.
The reconstructed atmospheric surface air temperatures apply to
all subarctic to arctic land masses (including continental shelves)
north of about ~45N.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2008/bintanja2008.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bintanja2008/bintanja2008.txt
USA/NOAA
DIF
Version 9.8.4
2019-01-30
2019-01-30