GDAS terrain height?
Posted: July 18th, 2019, 8:52 pm
Hello,
I am using GDAS 1 deg resolution data for HYSPLIT back trajectory modeling. In the traj output, there is a column of terrain height asl. What's the resolution of this "terrain" height data? Is it also 1 deg? If so, finer scale peaks or mountains might be smoothed out. Is the elevation the same for the whole 1 degree grid?
I am curious how the terrain height is treated by HYSPLIT. I saw previous posts that NCEP/NCAR terrain height is inferred from pressure fields, not real elevation asl. I am considering to use HYSPLIT trajectory end point coordinates as input to DEM raster to read the real "elevation" from the exact coordinates. Do you caveat on this?
Best,
Ryan
I am using GDAS 1 deg resolution data for HYSPLIT back trajectory modeling. In the traj output, there is a column of terrain height asl. What's the resolution of this "terrain" height data? Is it also 1 deg? If so, finer scale peaks or mountains might be smoothed out. Is the elevation the same for the whole 1 degree grid?
I am curious how the terrain height is treated by HYSPLIT. I saw previous posts that NCEP/NCAR terrain height is inferred from pressure fields, not real elevation asl. I am considering to use HYSPLIT trajectory end point coordinates as input to DEM raster to read the real "elevation" from the exact coordinates. Do you caveat on this?
Best,
Ryan