Hi Yuecheng,
Wet deposition values are negative in CAM output because it is a removal from the atmosphere.
In CLM output it is positive because it is an addition to the land module.
Hope that helps.
Best,
Rebecca
Wet deposition values are negative in CAM output because it is a removal from the atmosphere.
In CLM output it is positive because it is an addition to the land module.
Hope that helps.
Best,
Rebecca
Hi, Rebecca,
Thank you for your reply. By the way, are these the variable names for sulfur deposition in CLM: 'so4_a1DDF', 'so4_a1SFWET', 'so4_a2DDF', 'so4_a2SFWET', 'so4_a3DDF', 'so4_a3SFWET', 'WD_SO2', 'WD_H2SO4', 'DF_H2SO4', 'DF_SO2'?
Best,
Yuecheng
Hi Yuecheng,
You will need to investigate CLM documentation and ask their team about their variable names for output.
For CAM-chem, information about output can be found here on the wiki:
wiki.ucar.edu
As well as the MASTER FIELD LIST within the atmospheric log file of your build of CAM-chem. An example of all possible simulation output with descriptions can be found here:
wiki.ucar.edu
Those species you listed do look like they are the sulfur deposition species (wet and dry) in CAM-chem.
Best,
Rebecca
You will need to investigate CLM documentation and ask their team about their variable names for output.
For CAM-chem, information about output can be found here on the wiki:
Using CAM-chem Output - CAM-Chem - wiki.ucar.edu
As well as the MASTER FIELD LIST within the atmospheric log file of your build of CAM-chem. An example of all possible simulation output with descriptions can be found here:
CAM-chem History Fields - CAM-Chem - wiki.ucar.edu
Those species you listed do look like they are the sulfur deposition species (wet and dry) in CAM-chem.
Best,
Rebecca
Hi Rebecca,
Are there any other reasons that could cause the S deposition to show negative values, especially wet deposition? This is because the N deposition values I simulated using CAM (‘dry_deposition_NHx_as_N’, ‘wet_deposition_NOy_as_N’, ‘wet_deposition_NHx_as_N’, ‘wet_deposition_NOy_as_N’) are all positive.
Best,
Yuecheng
Are there any other reasons that could cause the S deposition to show negative values, especially wet deposition? This is because the N deposition values I simulated using CAM (‘dry_deposition_NHx_as_N’, ‘wet_deposition_NOy_as_N’, ‘wet_deposition_NHx_as_N’, ‘wet_deposition_NOy_as_N’) are all positive.
Best,
Yuecheng
Hi Yuecheng,
Wet deposition fluxes (WD_*) are reported as negative, but dry dep fluxes (DF_*) are positive values - this is just a convention with no real significance. Both are losses from the atmosphere.
The "wet/dry_deposition_*_as_N" variables are fields that are primarily for passing the nitrogen deposition totals to the land model.
Best,
Rebecca
Wet deposition fluxes (WD_*) are reported as negative, but dry dep fluxes (DF_*) are positive values - this is just a convention with no real significance. Both are losses from the atmosphere.
The "wet/dry_deposition_*_as_N" variables are fields that are primarily for passing the nitrogen deposition totals to the land model.
Best,
Rebecca