Donwscale CESM-DPLE simulations using WRF

[acast]

Dear forum

I am planning to downscale CESM-DPLE simulations using WRF. Based on this post I am not sure if all the variables needed are available (WPS ECMWF (ds626.0) surface and isobaric levels as initial and boundary conditions) and the files I have from CESM-DPLE are in NetCDF format. The variables are skin temperature, sea level pressure, SST, surface pressure, specific humidity, temperature, and u and v component of wind, 2m temperature, soil temperature (in top 10 cm of soil and vegetated land units), 10 m u and v and volumetric soil level, surface Geopotential and Geopotential height at 300 and 500 mb.

I would like to know if i)I can run WRF with only these variables. I only have volumetric soil water and not soil moisture and Geopotential height only available at surface 300 and 500 mb and ii)someone can help me convert these files to intermediate WPS format.

Thanks,



Alma

 

[Ming Chen]

Alma,

Required Meteorological Fields for Running WRF are listed below:​

Field name in intermediate file	Units​	Description​	Notes​
TT	K	3-d air temperature
RH	%	3-d relative humidity	Not needed if SPECHUMD is available
SPECHUMD	kg kg-1	3-d specific humidity	Not needed if RH is available
UU	m s-1	3-d wind u-component
VV	m s-1	3-d wind v-component
GHT	m	3-d geopotential height
PRESSURE	Pa	3-d pressure	Only needed for non-isobaric datasets
PSFC	Pa	Surface pressure
PMSL	Pa	Mean sea-level pressure
SKINTEMP	K	Skin temperature
SOILHGT	m	Soil height
TT	K	2-meter air temperature
RH	%	2-meter relative humidity	Not needed if SPECHUMD is available
SPECHUMD	kg kg-1	2-meter specific humidity	Not needed if RH is available
UU	m s-1	10-meter wind u-component
VV	m s-1	10-meter wind v-component
LANDSEA	fraction	Land-sea mask (0=water, 1=land)
SMtttbbb	m3 m-3	Soil moisture	'ttt' is the layer top depth in cm, and 'bbb' is the layer bottom depth in cm
STtttbbb	K	Soil temperature
SOILMmmm	kg m-3	Soil moisture	'mmm' is the level depth in cm, not needed if SMtttbbb available
SOILTmmm	K	Soil temperature

 

[Ming Chen]

Pleas take a look at the document below, which describes in detail the format of intermediate file.

Chapter 3: WRF Standard Initialization

based on this, you can easily read your data and write them to intermediate format files.