cam6

Why is the 500 hPa geopotential height in the CAM5 simulation results so strange over land? The simulation of geopotential height in CAM6 is closer to ERA5, but due to the bias in CAM6's precipitation results, we have to use CAM5 for the study for now. The geopotential height variable (Z3) in...

What version of the code are you using? CESM2.2.2, CAM6 Have you made any changes to files in the source tree? Changes in nudging and CLM Describe every step you took leading up to the problem: I need to use ERA5 re-analisys files to nudge aerosols. Describe your problem or question: I...

Hello, I am working with the FWsc2010climo compset. The default resolution is f09_f09_mg17. For my application, I would like to use a more regular ~1° × 1° grid instead. From what I understand, this would require regridding all of the input data (initial conditions, prescribed ozone, CO₂...

What version of the code are you using? I am using CESM2.1.5 Have you made any changes to files in the source tree? I have not made any change yet Describe your problem or question: Dear CESM staff: I am working with the following component set...

What version of the code are you using? CESM2.2.2 Have you made any changes to files in the source tree? Changes in dust scheme and nuding Describe every step you took leading up to the problem: I need to create new emissions for current months of 2025 and I need some specific NCL libraries...

When simulating precipitation after 2015, the model results show that, compared with ERA5, the large-scale summer rain belt over China and adjacent regions is shifted northward, convective precipitation is relatively weak, and the western Pacific subtropical high (defined by the 5880-gpm...

I am a beginner to CESM, and am using CESM2.1.3 to run a CO2 forcing experiment. I would like to increase the CO2 concentration by 0.73% for 190 years to go from 284 ppmv (as set by co2vmr in the restart files) to 1135 ppmv. Can I use the following namelist variables to do so? Any suggestions...

I am currently using the CAM6.0 model and would like to calculate the apparent heat source and moisture sink. From previous discussions on this topic, I found some answers regarding CAM3: For temperature, the total physics tendency is PTTEND, where: PTTEND = DTCOND + QRS + QRL + DTV + TTGWORO...

What version of the code are you using? CESM2.2.2 in Derecho Have you made any changes to files in the source tree? Some modification in nudging module Describe your problem or question: What and where is located the subroutine that generates all the log files?.. Thanks

What version of the code are you using? CESM2.2.1/CAM6 in Derecho Have you made any changes to files in the source tree? Some changes in the nudging module Describe every step you took leading up to the problem: After modifying the nudging module I want to see how the q-array where are all the...

Hello, I am a user of CESM 2.2.2 and the atmospheric model is CAM6. I want to add additional outputs for some variables involving temperature and moisture balances. To do this, I need to find relevant variables and understand how they are calculated. I find this document useful...

What version of the code are you using? CESM2.1.3, cam6, clm5 Have you made any changes to files in the source tree? I haven't change the code. I want to run a base case successfully at first. Describe your problem or question: I have tried different compsets, including FCSD, FC2010climo...

What version of the code are you using? CESM2.1.5 Have you made any changes to files in the source tree? Not yet Describe your problem or question: Dear community, I plan to run a set of nudging experiments based on compset FHIST_BGC in CESM2.1.5. However, instead of using the default...

Dear all, I am currently evaluating two SST datasets, HadOIBl-SST and PCMDI-SST. While PCMDI-SST was based on observational data and explicitly designed for AMIP runs, I noticed that CESM2 predominantly uses the HadOIBl-SST dataset. I looked at both datasets, and the most significant...

Hi, I am trying to rerun a version of the CAM6 PPE on Derecho, incorporating a few changes to the model. To start, I have just been trying to get the correct CAM6 setup I need to build and run on Derecho. I recently was successful in building the model and submitting a case, but the case timed...

-I am using CESM2.1.5, due to the HPC storage quota. I want to run cam atm components only, and remove the rest components . Is there a possibility of getting xml format, which was prepared to simulate only the atmospheric (atm) components please?

Hi everyone, I've been working with the F2000climo compset and noticed that the input files seem to contain only twelve months of data, which I assume is circulated annually by the model. However, I would like to introduce time-varying SST and CO2 data in my simulations. To achieve this, I'm...

Greetings, I am working on how to modify the mass mixing ratio constituents in some modes and in the user guide for CAM6 indicates that: "The names of the mass mixing ratio constituents are hardcoded in the modal_aero_initialize_data module. " Where could I find that...

Hi, I am looking to produce some nudged simulations in the CESM2 CAM6 subseasonal prediction system. Some of these will be everywhere (constant window function) and some will be in particular boxes using a window function horizontally and vertically (tropical troposphere, extratropical NH...

Hello, everyone, I am using CESM 2.1.3 PC6 compset aiming to diagnosis of radiation flux by PORT. This compset requires a set of input file. I used the h1 file exported from F2000climo as a "base", with modified variables in it. I modified all the variables containing the time and vertical...