Difference between revisions of "Present Day Greenland"

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Journal of Glaciology, Vol. 55, No. 189, 2009
 
Journal of Glaciology, Vol. 55, No. 189, 2009
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|surface_temperature
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|degrees Celsius
 
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|-valign="top"   
 
| ''Future Precipitation Forcing''
 
| ''Future Precipitation Forcing''

Revision as of 15:28, 31 March 2009

Contents

Grid Details

These are 5km resolution, NetCDF files of Greenland gathered from various data sources and interpolated, when necessary, onto the same grid using polar stereographic projection.

Mapping: Polar Stereographic
Standard Parallel    71.0
Latitude of Projection Origin   90.0
False Easting    0.0
False Northing    0.0
Straight Vertical Longitude from Pole   -39.0
Lower Left Corner X-Value   -800 km
Lower Left Corner Y-Value   -3400 km

Data Download

Greenland The data files contains the following fields in a NetCDF format:
  • Latitude
  • Longitude
  • Ice Thickness, 5km, corrected,(Bamber 2001)
  • Bed Topography, 5km, corrected,(Bamber 2001) + Bathymetry(Jakobsson et al. 2008)Data courtesy of Ed Bueler
  • Ice Surface Elevaton, 5km, corrected,(Bamber 2001)
  • Precipitation, courtesy of Bea Csatho (van der Veen, Bromwich, Csatho and Kim 2001)
  • Basal Heat Flux, Shapiro and Ritzwoller(2004) Data courtesy of Ed Bueler.
  • Mean Annual Near-surface(2m) Air Temperature, (Fausto et al 2009)
media:Greenland_5km_v5.nc

The recent changes to the files above can be found in the change log.

Precipitation Maps

The precipitation maps below are courtesy of Bea Csatho and show the locations of data, and a comparison of the observation study and the Bromwich climate model.

Greenland: Stations Map.
Greenland: Colormaps of observational data.
Greenland: Model vs. observational data

Data Sources

Input Field Reference: Notes: CF Name: Units:
Precipitation van der Veen, Bromwich, Csatho and Kim (2001)
This data is in meters/year (water equivalent).

The grid was obtained from the following components:
(1) Geographic trend surface derived from multivariate regression of accumulation;
(2) Geometry effect regressing the geographic trend residual on the first and third principal components characterizing the ice sheet geometry;
(3) Kriging interpolation of residual=[accumulation (ice cores and pits) or precipitation (coastal stations) - geometry and geographic effects]
(4) Sublimation from Box and Steffen (2001).
netCDF, CF 1.3. Polar Stereographic projection, 5 km

Bed topography (Bamber 2001) + Bathymetry(Jakobsson et al. 2008) netCDF, CF 1.3. Polar Stereographic projection, 5 km bedrock_altitude meter
Ice thickness Bamber (2001) netCDF, CF 1.3. Polar Stereographic projection, 5 km land_ice_thickness meter
Surface elevation Bamber (2001) netCDF, CF 1.3. Polar Stereographic projection, 5 km surface_altitude meter
Basal Heat Flux Shapiro and Ritzwoller(2004) netCDF, CF 1.3 Polar Sterographic projection, 5km basal_heat_flux watts/meters^2
Temperature time series GRIP for 125kyr, interpolated over 100 year intervals Text file
Sea Level Change SPECMAP Text file, also in NetCDF
Mean Annual Temperature Calculated from a paper on present day parameterization for present-day Greenland (Fausto et al 2009), it has dependencies on latitude, longitude and altitude. Fausto et al

Journal of Glaciology, Vol. 55, No. 189, 2009

surface_temperature degrees Celsius
Future Precipitation Forcing
Future Temperature Forcing
Future Ocean Forcing