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radiation

  1. W

    Sign definition about radiation variables

    Hello! I was recently studying the surface energy balance, and while using CESM1 Last Millennium Ensemble data, I had questions about the direction of LWCF, SWCF. I know that FLUS = FLNS + FLDS, but the Pearson's correlation coefficient between FLUS calculated by this formula and TS is 1. I...
  2. Jewel

    Remove the radiation effect of a certain aerosol

    Hello everyone I added a new aerosol with dust components in CESM, but I don’t want this new aerosol to have radiation effects. I just want it to be transported and settled along with the dust aerosol. I tried setting the parameters in the '&rad_cnst_nl' corresponding radiation file to 0 or a...
  3. E

    How to appropriately calculate radiative forcing imbalance

    When running simulations with volcanic forcing in a fixed sea-surface temperature condition to get an estimate of the forcing, what output variables are the appropriate ones to use? From what I understand, the standard way to do this is to calculate it as the sum of the shortwave + longwave...
  4. K

    Clear sky upwelling LW not equal to total sky upwelling LW at surface?

    I am confused why the clearsky upwelling longwave flux at the surface (FLNSC - FLDSC) is not equal to the total sky upwelling longwave flux the the surface (FLNS - FLDS). There are regions where the total sky upwelling flux is over 100 W/m2 and/or 1.5+ times more than the clear sky. I looked...
  5. S

    [Question] Modifications of SW and LW flux at certain layers

    Dear CESM community, My colleague and I are trying to perform some simulations using CESM1.2.2 that modify SW and LW at different layers. For example, we want to modify the model to reflect more SW upward or reduce the outgoing longwave at the atmospheric layer near the tropopause. I checked...
  6. Z

    Question about the extra model top layer for radiation

    Hi, I am looking at the radiation calculation in CAM, and notice this in the CAM3 documentation: I wonder if this is still true in CAM5 or CAM6, and if there is any more detailed documentation on how the properties of this layer are chosen? Thanks!
  7. R

    Outlining the major differences between CCSM3 and Chou's Radiation Model

    Hello, I was looking at this site that shows a variety of things, including the equilibrium surface temperature given a series of specified parameters. It gives an option to swap between the CCSM3 and the Chou Model, of which I think more can be found about here. The models output different...
  8. T

    Scaling factor for aerosol optical depth in CAM 6

     In CAM 3, it was possible to add a scaling factor for aerosol mass using SCL_RF options. I was wondering if there is any way to do this in CAM 6. I was also wondering if it is possible to scale aerosol optical depth instead of the mass. Ideally, I would want to do this with radiation...
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