Greenland Basal Heat Flux

Meta-data for Greenland_heat_flux_5km.nc

GLOBAL ATTRIBUTES
title	Greenland basal heat flux
creator_name	Glen Granzow
institution	University of Montana
date_created	October 1, 2012
summary	This data set contains basal heat flux data for Greenland based on satellite magnetic field measurements. The data has been projected and interpolated onto the standard CISM grid.
mapping
ellipsoid	WGS84
grid_mapping_name	polar_stereographic
latitude_of_projection_origin	[ 90.]
standard_parallel	[ 71.]
straight_vertical_longitude_from_pole	[-39.]
false_easting	[ 0.]
false_northing	[ 0.]
bheatflx
long_name	Basal Heat Flux
standard_name	upward_geothermal_flux_at_ice_base
units	watts/meter^2
grid_mapping	mapping
creator_name	Glen Granzow
contributor_name	Michael Purucker
contributor_role	Michael Purucker provided the original data from which this data set was interpolated.
contributor_url	http://core2.gsfc.nasa.gov/research/purucker/heatflux_updates.html
reference_url	http://core2.gsfc.nasa.gov/research/purucker/foxmaule_dkc09-09_greenland.pdf
source	http://core2.gsfc.nasa.gov/research/purucker/heatflux_mf7_foxmaule05.txt
reference	Fox Maule, C., Purucker, M.E., Olsen, N. & Mosegaard, K., 2005. Heat flux in Antarctica revealed from satellite magnetic data, Science, 309, 464-467, doi: 10.1126/science.1106888.
comments	The original data, provided by Mike Purucker, giving the basal heat flux at specific longitudes and latitudes is quite sparse. Projection and interpolation of the data onto the CISM standard grid was accomplished using a python script written by Glen Granzow. This script used pyproj, a python interface to the PROJ.4 library, to generate x,y coordinates in the required stereographic projection then matplotlib.mlab.griddata for interpolation. matplotlib.mlab.griddata implements natural neighbor interpolation which is based on Delaunay triangulation. To interpolate onto grid points outside the convex hull of the original data set, four fictitious points were added to the original data, one outside each corner of the final data grid. The assumed value of heat flux at the fictitious points was the mean of the heat flux at the actual data points. The vast majority of the interpolated data influenced by these fictitious points are in the ocean and thus of little concern.
x1
long_name	Cartesian x-coordinate
standard_name	projection_x_coordinate
units	meters
y1
long_name	Cartesian y-coordinate
standard_name	projection_y_coordinate
units	meters
time
calender	none
long_name	Time
standard_name	time
units	year since 1-1-1 0:0:0