remap of flux
Added by Shizhu Wang about 6 years ago
Hi,
I am a user of cdo. Today when I do the remap of the global river discharge:cdo remapbil,r360x80 in.nc out.nc
I find after remap, the total river transport into the ocean changes a lot.
Then I realize that when I remap the flux terms, I need to calculate the total transport by
multiplying the flux and cell_area, then I can do the remap.
So I am wondering that not only river runoff, when I do the remap of radiation or precipitation,
I can not do the remap directly. I need to calculate the total transport first, then
remap the total transport.
AM I right? I am not sure about that.
Thanks.
Shizhu
Replies (3)
RE: remap of flux - Added by Ralf Mueller about 6 years ago
Hi!
Depending on your source grid (which know nothing about) bilinear remapping can cause differences wrt. the total flux. I personally would stick to conservative remapping instead of bilinear to get around this.
hth
ralf
RE: remap of flux - Added by Shizhu Wang about 6 years ago
Dear Ralf,
thanks for you reply.
Yes, I just tried remapcon,remapbil and remapnn. I think remapcon and remapnn work well.
By the way, all of there remap commands can deal with missing value? Because when I use remapbil, the result seems strange.
Best,
Shizhu
RE: remap of flux - Added by Ralf Mueller about 6 years ago
have a look into the manual: https://code.mpimet.mpg.de/projects/cdo/embedded/cdo.pdf
starting from page 149. docu is pretty extensive on that topic