North American Regional Climate Change Assessment Program
North American Regional Climate Change Assessment Program
    Home About Projections
 
  PROGRAM
About NARCCAP
About Data
Contact Us
  RESOURCES
For PIs
For Users
    Access Data
  User Directory
  Contributions
  Acknowledgements
  RESULTS
Output Data Catalog
General Results
    NCEP-Driven RCM Runs
Climate Change Results
CRCM+CCSM
CRCM+CGCM3
ECP2+GFDL
ECP2+HadCM3 NEW!
HRM3+GFDL
HRM3+HadCM3
MM5I+CCSM
MM5I+HadCM3 NEW!
RCM3+CGCM3
RCM3+GFDL
WRFG+CCSM
WRFG+CGCM3
  SPONSORS
 
Projections
 

The grid_mapping attribute of the main data variable in each file names a "dummy" variable whose attributes record the type and parameters of the map projection used by each RCM. Here's a summary all in one place:

CRCM

polar_stereographic:grid_mapping_name = "polar_stereographic"
polar_stereographic:latitude_of_projection_origin = 90.
polar_stereographic:standard_parallel = 60.
polar_stereographic:straight_vertical_longitude_from_pole = 263.
polar_stereographic:false_easting = 3475000.
polar_stereographic:false_northing = 7475000.

ECP2

polar_stereographic:grid_mapping_name = "polar_stereographic"
polar_stereographic:latitude_of_projection_origin = 90.
polar_stereographic:standard_parallel = 60.
polar_stereographic:straight_vertical_longitude_from_pole = 263.
polar_stereographic:false_easting = 4700000.
polar_stereographic:false_northing = 8500000.

HRM3

rotated_pole:grid_mapping_name = "rotated_latitude_longitude"
rotated_pole:grid_north_pole_latitude = 42.5
rotated_pole:grid_north_pole_longitude = 83.

MM5I

Lambert_Conformal:grid_mapping_name = "lambert_conformal_conic"
Lambert_Conformal:latitude_of_projection_origin = 47.5
Lambert_Conformal:longitude_of_central_meridian = -97.
Lambert_Conformal:standard_parallel = 30., 60.
Lambert_Conformal:false_easting = 3825000.
Lambert_Conformal:false_northing = 3200000.

RCM3

Transverse_Mercator:grid_mapping_name = "transverse_mercator"
Transverse_Mercator:latitude_of_projection_origin = 47.5
Transverse_Mercator:longitude_of_central_meridian = -97.
Transverse_Mercator:scale_factor_at_central_meridian = 1.
Transverse_Mercator:false_easting = 3900000.
Transverse_Mercator:false_northing = 3150000.

WRFG

Lambert_Conformal:grid_mapping_name = "lambert_conformal_conic"
Lambert_Conformal:latitude_of_projection_origin = 47.5
Lambert_Conformal:longitude_of_central_meridian = -97.
Lambert_Conformal:standard_parallel = 30., 60.
Lambert_Conformal:false_easting = 3325000.
Lambert_Conformal:false_northing = 2700000.

 
©2007 UCAR   |   Privacy Policy   |   Terms of Use   |   Site Map   |   top of page    
The National Center for Atmospheric Research is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.