NetCDF and forcings adjustments

[jwtrubil]

I am delving into the NetCDF forcing data features. Two questions have come up so far:

1) Is the adiabatic lapse rate still a meaningful parameter when gridded forcings are used? It appears that temperatures are clamped directly to an HRU, so I think no, but wanted to check.

2) Can I still use :SnowCorrection and :RainCorrection with netcdf forcings?

Thanks!

[jrcraig]

1) It is advised not to use orographic corrections with gridded climate data, as there is no reference elevation associated with the climate grid cells as there is for a gauge measurement. It is assumed that the climate data is implicitly corrected for elevation effects. Raven will (perhaps dangerously) allow you to apply lapse corrections, but gridded data is assumed to have a reference elevation of zero meters above sea level.

2) You cannot use the :SnowCorrection and :RainCorrection, but you can use the :LinearTransform command on any gridded data. The syntax is:

Code: Select all

:LinearTransform  a  b

where the gridded values will be transformed using y=a*x+b where x is the raw gridded data and y is the transformed data.

[jwtrubil]

Thank you!