Recent content by chunchih

Hi, OK. Sounds good! Thank you for your explanation. Best regards, David

Thanks for looking into this. The file I uploaded was wrfout_d03_2007-06-22_120000, inside a zipped folder called wrfout_psfc. I am not sure if there was another zipped file with the same name as the one I uploaded. I uploaded the file on Nov. 28 2023 if that helps. Since P, PB, and PSFC are...

Below is an example, I chose j = 328, i = 6 Total pressure at the first model level PT[0,328,6] in Pa. 93765.016 Surface pressure PSFC[328,6] 93748.14 Geopotential height at the first model level ZH[0,328,6] in meters. 637.4329 Terrain height HGT[328,6] in meters 621.8816 So the height...

This actually occurred for many points in the domain. Below are some points where this occurred. The three numbers are j index, i index, and the difference in Pa, respectively. PSFC lower than first model level pressure: 171 445 35.46875 PSFC lower than first model level pressure: 171 446...

I think there are such points in all three of my domains (1 parent, 2 nested). So far, I have only found this issue in my initial WRF output file (i.e., the very first output since the simulation start, which should be identical to the wrfinput file). I have uploaded the wrfinput and initial...

Hi, I discovered that the surface pressure (PSFC) at some points in my initial WRF output file (the output file at the initial time) is slightly lower than that at the first de-staggered model level, which does not make physical sense (pressure should decrease with height). However, my...

Hi, Another WRF user (xgfan_wrf) asked a similar question some time ago. However, after reading through the thread, the relationship between the soil temperature fields in met_em and wrfinput still isn't very clear to me. I have a couple of questions about the layered soil fields in general...

Hi Ming, In my METGRID.TBL, the fill_lev line for RH is indeed fill_lev=200100:const(-1.E30). I haven't checked my intermediate file yet. rd_intermediate.exe only printed out limited information about the fields in my intermediate file. Is there another utility program that I should use...

Hi Ming, Thanks! However, I am still unsure about the second issue with the slightly negative RH in met_em.

I am not sure if both are normal behaviors. My guess is that for the first issue, the RH with respect to ice is computed in the GFS analysis but in WPS and WRF, RH is only calculated with respect to liquid. I did some tests and found that the difference between the GFS analysis RH and met_em RH...

Hi, Out of curiosity, I looked into the RH (relative humidity) field in my GFS analysis data (the 0.5 deg GFS analysis) and compared that with the RH field in my met_em file processed by WPS, at the same time. I found that at higher pressure levels (i.e., closer to the ground), the RH in my...

Hi Ming, OK. Great! Thank you for your quick response. -David

Hi WRF support, I am running a real-case simulation using the Noah Land Surface Scheme. I have some questions about the inconsistencies between my met_em, wrfinput, and wrfout files regarding a few land-state variables. The first one is CANWAT (canopy water). I was looking into my CANWAT...

Hi Dr. Werner, That's OK. We ran the same simulation with different diff_6th_opt_factors ranging from 0.005 to 0.12. Using diff_6th_opt = 2 sufficiently reduces the stripes with any use of diff_6th_opt_factor above 0.005, but for reasons that we still do not understand very well, it also...

Hi Dr. Werner, Sorry, I just want to make sure that I understood your response correctly. When you say the stripes are 'resolved' by the end of my simulation do you mean that they disappear? Most of the stripes are gone (or fizzle out) about 3-4 hours before the end of my simulation. In...