nb.F90 File Reference

This module contains the subroutines that find the adjacent neighbors of a given cell, in a cubed sphere grid. More...

Go to the source code of this file.

Data Types
type	cs_nb::nb_gp_idx
	Neighboring cell descriptor. More...
type	cs_nb::nb_tile_idx
	Neighboring tile descriptor. More...

Functions/Subroutines
integer function	cs_nb::bndry (i, j)
	Get boundary type from indices for global grid. More...
integer function	cs_nb::bndry_reg (i, j)
	Get boundary type from indices for regional grid. More...
subroutine	cs_nb::idx_init (cres_in)
	Initialize inter-panel neighbor index for global grid. More...
subroutine	cs_nb::idx_init_reg (xres_in, yres_in)
	Initialize resolution module variables for regional grid. More...
subroutine	cs_nb::neighbors (tile, i, j, nb)
	Get neighbors of cell 'c' at (tile, i, j) for global grid. More...
subroutine	cs_nb::neighbors_reg (i, j, nb)
	Get neighbors of cell 'c' at (tile, i, j) for regional grid. More...

Variables
integer	cs_nb::cres
	Cubed sphere resolution. More...
type(nb_tile_idx), dimension(4, 6)	cs_nb::nb_tile
	Descriptor for each edge of each tile on the cubed sphere. More...
integer	cs_nb::xres
	x resolution of regional grid More...
integer	cs_nb::yres
	y resolution of regional grid More...

Detailed Description

This module contains the subroutines that find the adjacent neighbors of a given cell, in a cubed sphere grid.

Each neighbor is in the form of (i,j,tile).

Author

Ning Wang

Date

July 1, 2020

Definition in file nb.F90.

Function/Subroutine Documentation

bndry()

integer function cs_nb::bndry	(	integer	i,
		integer	j
	)

Get boundary type from indices for global grid.

Parameters

[in]	i	cell index
[in]	j	cell index

Returns

bndry cell boundary type

Author

Ning Wang

Definition at line 107 of file nb.F90.

bndry_reg()

integer function cs_nb::bndry_reg	(	integer	i,
		integer	j
	)

Get boundary type from indices for regional grid.

Parameters

[in]	i	cell index
[in]	j	cell index

Returns

cell boundary type

Author

Ning Wang

Definition at line 141 of file nb.F90.

idx_init()

subroutine cs_nb::idx_init

(

integer

cres_in

)

Initialize inter-panel neighbor index for global grid.

Parameters

[in]

cres_in

cubed sphere resolution (48, 96...)

   _______1_______
  |               |       1-upper, 2-bottom, 3-left, 4-right 
  |               |
  |               |
 3|               |4
  |               |
  |               |
  |_______________|
          2
      Figure 1. Boundary numbers

Author

Ning Wang

Definition at line 49 of file nb.F90.

idx_init_reg()

subroutine cs_nb::idx_init_reg	(	integer, intent(in)	xres_in,
		integer, intent(in)	yres_in
	)

Initialize resolution module variables for regional grid.

Parameters

[in]	xres_in	x resolution
[in]	yres_in	y resolution

Author

Ning Wang

Definition at line 92 of file nb.F90.

neighbors()

subroutine cs_nb::neighbors	(	integer	tile,
		integer	i,
		integer	j,
		type(nb_gp_idx)	nb
	)

Get neighbors of cell 'c' at (tile, i, j) for global grid.

     ______________
    |    |    |    |              ________
    | 5  | 1  | 6  |             /\ 1 \ 6 
    |____|____|____|            /  \___\___
    |    |    |    |           /\2 / c / 3 /
    | 2  | c  | 3  |          /  \/___/___/
    |____|____|____|          \7 / 4 / 8 /
    |    |    |    |           \/___/___/
    | 7  | 4  | 8  |       
    |____|____|____|    
  
 Figure 2.  Eight neighbors of cell 'c' and special cases at upper left
 cornner of the tile

Parameters

[in]	tile	tile face
[in]	i	cell index
[in]	j	cell index
[out]	nb	neighbors

Author

Ning Wang

Definition at line 193 of file nb.F90.

neighbors_reg()

subroutine cs_nb::neighbors_reg	(	integer	i,
		integer	j,
		type(nb_gp_idx)	nb
	)

Get neighbors of cell 'c' at (tile, i, j) for regional grid.

Parameters

[in]	i	cell index
[in]	j	cell index
[out]	nb	neighbors

Author

Ning Wang

Definition at line 394 of file nb.F90.

Variable Documentation

cres

integer cs_nb::cres

Cubed sphere resolution.

Definition at line 24 of file nb.F90.

nb_tile

type(nb_tile_idx), dimension(4,6) cs_nb::nb_tile

Descriptor for each edge of each tile on the cubed sphere.

Definition at line 22 of file nb.F90.

xres

integer cs_nb::xres

x resolution of regional grid

Definition at line 25 of file nb.F90.

yres

integer cs_nb::yres

y resolution of regional grid

Definition at line 26 of file nb.F90.