microphysics Module Reference

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This module provides a wrapper to call various microphysics models It sets up variables specific to the physics package to be used including history variables not currently stored in the domain level data structure More...

Public Member Functions
subroutine	mp_init (options)
	Initialize microphysical routines More...
subroutine	distribute_precip (current_precip, last_precip, local_fraction)
	Distribute the microphysics precipitation to neighboring grid cells More...
subroutine	mp (domain, options, dt_in, model_time)
	Microphysical driver More...
subroutine	mp_finish (options)
	Finalize microphysical routines More...

Public Attributes
integer	update_interval
real *8	last_model_time
real, dimension(:,:), allocatable	sr
real, dimension(:,:), allocatable	last_rain
real, dimension(:,:), allocatable	last_snow
real, dimension(:,:), allocatable	this_precip
integer, parameter	npoints =8
real, dimension(npoints)	dist_fraction = [ 0.1,0.15,0.1, 0.15,0.15, 0.1,0.15,0.1]
integer, dimension(npoints)	x_list = [ -1,0,1, -1,1, -1,0,1]
integer, dimension(npoints)	y_list = [ 1,1,1, 0,0, -1,-1,-1]

Detailed Description

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This module provides a wrapper to call various microphysics models It sets up variables specific to the physics package to be used including history variables not currently stored in the domain level data structure

The main entry point to the code is mp(domain,options,dt)

 Call tree graph :
  mp_init->[ external initialization routines]
  mp->[   external microphysics routines]
  mp_finish

 High level routine descriptions / purpose
   mp_init            - allocates module data and initializes physics package
   mp                 - sets up and calls main physics package
   mp_finish          - deallocates module memory, place to do the same for physics

 Inputs: domain, options, dt
      domain,options  = as defined in data_structures
      dt              = time step (seconds)
 

Author

Ethan Gutmann (gutma.nosp@m.nn@u.nosp@m.car.e.nosp@m.du)

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Member Function/Subroutine Documentation

subroutine microphysics::distribute_precip	(	real, dimension(:,:), intent(inout)	current_precip,
		real, dimension(:,:), intent(inout)	last_precip,
		real, intent(in)	local_fraction
	)

---

Distribute the microphysics precipitation to neighboring grid cells

Because ICAR can be too aggressive at putting precip on mountain tops, this routine smooths out the precip by keeping only a fraction of it locally, and distributing the rest to the neighboring grid cells, weighted by distance.

Parameters

[in,out]		accumulated model precip at this time step
[in]		accumulated model precip prior to microphysics call
[in]		fraction of precip to maintain in the local gridcell

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subroutine microphysics::mp	(	type(domain_type), intent(inout)	domain,
		type(options_type), intent(in)	options,
		real, intent(in)	dt_in,
		double precision, intent(in)	model_time
	)

---

Microphysical driver

This routine handles calling the individual microphysics routine specified, that includes creating and passing any temporary variables, and checking when to update the microphysics based on the specified update_interval.

Parameters

domain	ICAR model domain structure
options	ICAR model options structure
dt_in	Current driving time step (this is the advection step)
model_time	Current model time (to check if it will exceed the update_interval)

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subroutine microphysics::mp_finish

(

type(options_type), intent(in)

options

)

---

Finalize microphysical routines

This routine will call the finalization routines (if any) for the specified microphysics packages. It also deallocates any module level variables, e.g. SR

Parameters

options

ICAR model options to specify required initializations

subroutine microphysics::mp_init

(

type(options_type), intent(in)

options

)

---

Initialize microphysical routines

This routine will call the initialization routines for the specified microphysics packages. It also initializes any module level variables, e.g. update_interval

Parameters

options

ICAR model options to specify required initializations

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Member Data Documentation

real, dimension(npoints) microphysics::dist_fraction = [ 0.1,0.15,0.1, 0.15,0.15, 0.1,0.15,0.1]

real*8 microphysics::last_model_time

real, dimension(:,:), allocatable microphysics::last_rain

real, dimension(:,:), allocatable microphysics::last_snow

integer, parameter microphysics::npoints =8

real, dimension(:,:), allocatable microphysics::sr

real, dimension(:,:), allocatable microphysics::this_precip

integer microphysics::update_interval

integer, dimension(npoints) microphysics::x_list = [ -1,0,1, -1,1, -1,0,1]

integer, dimension(npoints) microphysics::y_list = [ 1,1,1, 0,0, -1,-1,-1]

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The documentation for this module was generated from the following file:

• physics/mp_driver.f90