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◆ icloud()

subroutine gfdl_cloud_microphys_mod::icloud ( integer, intent(in) ktop,
integer, intent(in) kbot,
real, dimension (ktop:kbot), intent(inout) tzk,
real, dimension (ktop:kbot), intent(in) p1,
real, dimension (ktop:kbot), intent(inout) qvk,
real, dimension (ktop:kbot), intent(inout) qlk,
real, dimension (ktop:kbot), intent(inout) qrk,
real, dimension (ktop:kbot), intent(inout) qik,
real, dimension (ktop:kbot), intent(inout) qsk,
real, dimension (ktop:kbot), intent(inout) qgk,
real, dimension (ktop:kbot), intent(in) dp1,
real, dimension (ktop:kbot), intent(in) den,
real, dimension (ktop:kbot), intent(in) denfac,
real, dimension (ktop:kbot), intent(in) vts,
real, dimension (ktop:kbot), intent(in) vtg,
real, dimension (ktop:kbot), intent(in) vtr,
real, dimension (ktop:kbot), intent(inout) qak,
real, intent(in) rh_adj,
real, intent(in) rh_rain,
real, intent(in) dts,
real, intent(in) h_var )
private
Author
Shian-Jiann Lin, GFDL

This scheme is featured with:

  • bulk cloud microphysics
  • processes splitting with some un-split sub-grouping
  • time implicit (when possible) accretion and autoconversion

GFDL icloud Detailed Algorithm

  • Define conversion scalar/factor.
  • Define heat capacity and latend heat coefficient.
  • Calculate P_{imlt}: instant melting of cloud ice.
  • Calculate P_{ihom}: homogeneous freezing of cloud water into cloud ice. This is the 1st occurance of liquid water freezing in the split MP process.
  • Call linear_prof() to calculate vertical subgrid variability of cloud ice.
  • Update capacity heat and latend heat coefficient.
  • Melting of snow:
  • P_{sacw}: accretion of cloud water by snow
  • P_{sacr}: accretion of rain by melted snow
  • P_{racs}: accretion of snow by rain
  • Total snow sink: P_{smlt}: snow melt (smlt(); due to rain accretion)
  • Update capacity heat and latend heat coefficient.
  • Melting of graupel:
  • P_{gacr}: accretion of rain by graupel
  • P_{gacw}: accretion of cloud water by graupel
  • P_{gmlt}: graupel melt (gmlt())
  • Cloud ice processes:
  • P_{saci}: accretion of cloud ice by snow
  • P_{saut}: autoconversion: cloud ice \rightarrow snow.
    similar to Lin et al.(1983) [119] eq. 21 solved implicitly; threshold from wsm6 scheme, Hong et al. (2004) [94], eq (13) : qi0_crt ~0.8e-4.
  • P_{gaci}: accretion of cloud ice by graupel
  • Cold-rain processes:
  • P_{sacr}: accretion of rain by snow (acr3d())
  • P_{gfr}: rain freezing \rightarrow graupel
  • Calculate total sink to q_r :
    Sink terms to q_r: P_{sacr}+P_{gfr}
    source term to q_s: P_{sacr}
    source term to q_g: P_{gfr}
  • Update capacity heat and latend heat coefficient.
  • Graupel production terms:
  • accretion: snow \rightarrow graupel (acr3d())
  • autoconversion: snow \rightarrow graupel
  • P_{gacw}: accretion of cloud water by graupel
  • P_{gacr}: accretion of rain by graupel (acr3d())

Definition at line 1544 of file module_gfdl_cloud_microphys.F90.

References acr3d(), linear_prof(), smlt(), and subgrid_z_proc().

Referenced by mpdrv().

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