noaa-model-13440
Model Simulations of Orbital Sensitivity of North American Ice Sheets
Pollard, D.; DeConto, R.M.
Model Simulations of Orbital Sensitivity of North American Ice Sheets
2012-10-24
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13440
Investigator
D.
Pollard
Investigator
R.M.
DeConto
earth science
paleoclimate
paleoclimatic modeling
latitude,null,null,degree north,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
upward ice sheet velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,basal ice
earth science
paleoclimate
paleoclimatic modeling
ice sheet x velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet calving,null,null,meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet area,null,null,square meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
bedrock elevation,null,null,meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet elevation,null,null,meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
age,null,null,year Common Era,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet volume,null,null,cubic meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet area,null,null,square meter,annual,paleoclimatic modeling,null,null,N,floating ice area
earth science
paleoclimate
paleoclimatic modeling
bedrock elevation,null,one standard deviation,meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet melt,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,surface melt rate
earth science
paleoclimate
paleoclimatic modeling
ice sheet x velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,surface ice
earth science
paleoclimate
paleoclimatic modeling
ice sheet area,null,null,square meter,annual,paleoclimatic modeling,null,null,N,grounded ice area
earth science
paleoclimate
paleoclimatic modeling
rainfall,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet y velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
notes,null,null,dimensionless,annual,paleoclimatic modeling,null,null,N,OH basin sector number
earth science
paleoclimate
paleoclimatic modeling
sea level,null,null,meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet thickness,null,null,meter,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice temperature,null,null,degree Celsius,annual,paleoclimatic modeling,null,null,N,surface temperature
earth science
paleoclimate
paleoclimatic modeling
ice temperature,null,null,degree Celsius,annual,paleoclimatic modeling,null,null,N,basal temperature
earth science
paleoclimate
paleoclimatic modeling
ice sheet y velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,surface ice
earth science
paleoclimate
paleoclimatic modeling
snowfall,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
bedrock elevation,null,null,meter,annual,paleoclimatic modeling,null,null,N,equilibrium bedrock elevation
earth science
paleoclimate
paleoclimatic modeling
ice sheet melt,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,sub-ice oceanic melt rate
earth science
paleoclimate
paleoclimatic modeling
surface type,null,null,dimensionless,annual,paleoclimatic modeling,null,null,N,mask
earth science
paleoclimate
paleoclimatic modeling
ice sheet melt,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,face melt rate
earth science
paleoclimate
paleoclimatic modeling
upward ice sheet velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,surface ice
earth science
paleoclimate
paleoclimatic modeling
longitude,null,null,degree east,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
ice sheet volume,null,null,cubic meter,annual,paleoclimatic modeling,null,null,N,grounded ice volume
earth science
paleoclimate
paleoclimatic modeling
ice sheet volume,null,null,cubic meter,annual,paleoclimatic modeling,null,null,N,floating ice volume
earth science
paleoclimate
paleoclimatic modeling
ice temperature,null,null,degree Celsius,annual,paleoclimatic modeling,null,null,N,basal homologous temperature
earth science
paleoclimate
paleoclimatic modeling
ice sheet x velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,basal ice
earth science
paleoclimate
paleoclimatic modeling
ice sheet y velocity,null,null,meter per year,annual,paleoclimatic modeling,null,null,N,basal ice
earth science
paleoclimate
model
other model
geoscientificInformation
200000 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
Pollard, D. and R.M. DeConto. 2012.
Description of a hybrid ice sheet-shelf model, and application to Antarctica.
Geoscientific Model Development, 5, 1273-1295. DOI: 10.5194/gmd-5-1273-2012
The formulation of a 3-D ice sheet-shelf model is described. The model is designed for long-term continental-scale applications, and has been used mostly in paleoclimatic studies. It uses a hybrid combination of the scaled shallow ice and shallow shelf approximations for ice flow. Floating ice shelves and grounding-line migration are included, with parameterized ice fluxes at grounding lines that allows relatively coarse resolutions to be used. All significant components and parameterizations of the model are described in some detail. Basic results for modern Antarctica are compared with observations, and simulations over the last 5 million years are compared with previously published results. The sensitivity of ice volumes during the last deglaciation to basal sliding coefficients is discussed.
STUDY NOTES: Snapshots of a 3-D ice sheet model (Pollard and DeConto, 2012) applied over
North America and Greenland, driven either by simply parameterized climate
(similarly to Pollard and DeConto, 2009), or by a look-up table of previous
Global Climate Model (GCM) solutions (similarly to DeConto and Pollard, 2003),
with idealized 40,000-yr sinusoidal climate variations.
Main model variables of interest are:
h = ice sheet thickness (m)
hs = surface elevation (m)
hb = bedrock elevation (m)
maskwater = 0 for land or grounded ice, 1 for ocean or floating ice.
Latitudes of grid points:
Every 0.5 degrees, from 20.5 N to 84.5 N (130 points).
Longitudes of grid points:
Every 1.0 degrees, from 179.5 W to -10.5 W (170 points).
Time period:
Model integrations of up to 200,000 years, representing idealized
orbital forcing with 40,000 year periodicity. Variables are saved
every 2000 years, from 0 up to 200000 yr (up to 101 saves).
Each NetCDF file contains results for one model experiment, named as follows:
fort.92_cyca to fort.92_cych.nc:
Using parameterized climate forcing, each with slightly different climate
parameters.
fort.92_gcmcyc1.nc to fort.92_gcmcyc5.nc:
Using GCM lookup-table forcing, each with slightly different look-up
parameters, mainly albedo feedback strength.
ADDITIONAL REFERENCE:
DeConto, R.M. and D. Pollard. 2003. Rapid Cenozoic glaciation of Antarctica induced by declining atmospheric CO2. Nature, 421, 245-249.
ADDITIONAL REFERENCE:
Pollard, D. and R.M. DeConto. 2009. Modelling West Antarctic ice sheet growth and collapse through the past five million years. Nature, 458, 329-332
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycj.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/pollard2012icesheets.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc1.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc2.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycb.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc5.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc4.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cyca.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycc.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cyce.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cych.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycf.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycg.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cyci.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycd.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc3.nc
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11