| Class | timefilter_asselin1972 |
| In: |
util/timefilter_asselin1972.f90
|
Note that Japanese and English are described in parallel.
計算モードを抑えるためのタイムフィルター (Asselin, 1972) を適用するためのモジュールです.
すなわち \[
\bar{A}^{t}
= {A}^{t}
+ \epsilon_f
\left(
\bar{A}^{t-\Delta t} - 2{A}^{t} + {A}^{t+\Delta t}
\right) \] \[
\qquad
= ( 1-2 \epsilon_f ) {A}^{t}
+ \epsilon_f
\left( \bar{A}^{t-\Delta t} + {A}^{t+\Delta t} \right)
\] として $ bar{A}^{t} $ を求めます. 添え字 $ t-\Delta t, t, t+Delta t $ はそれぞれ時間ステップを表し, タイムフィルターが適用された項には上線 ( $ bar{quad} $ ) が付いています.
タイムフィルターの係数 $epsilon_f$ は Create の際に設定します.
Time filter (Asselin, 1972) for suppression of computational mode is applied.
Concretely, $ bar{A}^{t} $ is derived as follows. \[
\bar{A}^{t}
= {A}^{t}
+ \epsilon_f
\left(
\bar{A}^{t-\Delta t} - 2{A}^{t} + {A}^{t+\Delta t}
\right) \] \[
\qquad
= ( 1-2 \epsilon_f ) {A}^{t}
+ \epsilon_f
\left( \bar{A}^{t-\Delta t} + {A}^{t+\Delta t} \right),
\] where suffices $ t-\Delta t, t, t+Delta t $ represent time step, and over-bar $ bar{quad} $ represents the terms applied time filter.
Time filter coefficient $ epsilon_f $ is specified by "Create".
| TimeFilter : | タイムフィルターの適用 |
| ———— : | ———— |
| TimeFilter : | Apply time filter |
NAMELIST#timefilter_asselin1972_nml
| Subroutine : | |||
| xyz_UB(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xyz_VB(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xyz_TempB(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xyz_QVapB(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xy_PsB(0:imax-1, 1:jmax) : | real(DP), intent(in)
| ||
| xyz_UN(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(inout)
| ||
| xyz_VN(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(inout)
| ||
| xyz_TempN(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(inout)
| ||
| xyz_QVapN(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(inout)
| ||
| xy_PsN(0:imax-1, 1:jmax) : | real(DP), intent(inout)
| ||
| xyz_UA(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xyz_VA(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xyz_TempA(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xyz_QVapA(0:imax-1, 1:jmax, 1:kmax) : | real(DP), intent(in)
| ||
| xy_PsA(0:imax-1, 1:jmax) : | real(DP), intent(in)
|
予報変数にタイムフィルターを適用します.
Time filter is applied to predictional variables.
subroutine TimeFilter( xyz_UB, xyz_VB, xyz_TempB, xyz_QVapB, xy_PsB, xyz_UN, xyz_VN, xyz_TempN, xyz_QVapN, xy_PsN, xyz_UA, xyz_VA, xyz_TempA, xyz_QVapA, xy_PsA )
!
! 予報変数にタイムフィルターを適用します.
!
! Time filter is applied to predictional variables.
!
! モジュール引用 ; USE statements
!
! 時刻管理
! Time control
!
use timeset, only: TimesetClockStart, TimesetClockStop
! 宣言文 ; Declaration statements
!
implicit none
real(DP), intent(in):: xyz_UB (0:imax-1, 1:jmax, 1:kmax)
! $ u (t-\Delta t) $ . 東西風速. Eastward wind
real(DP), intent(in):: xyz_VB (0:imax-1, 1:jmax, 1:kmax)
! $ v (t-\Delta t) $ . 南北風速. Northward wind
real(DP), intent(in):: xyz_TempB (0:imax-1, 1:jmax, 1:kmax)
! $ T (t-\Delta t) $ . 温度. Temperature
real(DP), intent(in):: xyz_QVapB (0:imax-1, 1:jmax, 1:kmax)
! $ q (t-\Delta t) $ . 比湿. Specific humidity
real(DP), intent(in):: xy_PsB (0:imax-1, 1:jmax)
! $ p_s (t-\Delta t) $ . 地表面気圧. Surface pressure
real(DP), intent(inout):: xyz_UN (0:imax-1, 1:jmax, 1:kmax)
! $ u (t) $ . 東西風速. Eastward wind
real(DP), intent(inout):: xyz_VN (0:imax-1, 1:jmax, 1:kmax)
! $ v (t) $ . 南北風速. Northward wind
real(DP), intent(inout):: xyz_TempN (0:imax-1, 1:jmax, 1:kmax)
! $ T (t) $ . 温度. Temperature
real(DP), intent(inout):: xyz_QVapN (0:imax-1, 1:jmax, 1:kmax)
! $ q (t) $ . 比湿. Specific humidity
real(DP), intent(inout):: xy_PsN (0:imax-1, 1:jmax)
! $ p_s (t) $ . 地表面気圧. Surface pressure
real(DP), intent(in):: xyz_UA (0:imax-1, 1:jmax, 1:kmax)
! $ u (t+\Delta t) $ . 東西風速. Eastward wind
real(DP), intent(in):: xyz_VA (0:imax-1, 1:jmax, 1:kmax)
! $ v (t+\Delta t) $ . 南北風速. Northward wind
real(DP), intent(in):: xyz_TempA (0:imax-1, 1:jmax, 1:kmax)
! $ T (t+\Delta t) $ . 温度. Temperature
real(DP), intent(in):: xyz_QVapA (0:imax-1, 1:jmax, 1:kmax)
! $ q (t+\Delta t) $ . 比湿. Specific humidity
real(DP), intent(in):: xy_PsA (0:imax-1, 1:jmax)
! $ p_s (t+\Delta t) $ . 地表面気圧. Surface pressure
! 作業変数
! Work variables
!
! 実行文 ; Executable statement
!
! 計算時間計測開始
! Start measurement of computation time
!
call TimesetClockStart( module_name )
! 初期化
! Initialization
!
if ( .not. timefilter_asselin1972_inited ) call TimeFiltInit
! ステップのチェック
! Check Step
!
CurStep = CurStep + 1
if ( CurStep - PrevStep < IntStep ) return
PrevStep = CurStep
! FilterParameter の有効性のチェック
! Check validity of "FilterParameter"
!
if ( FilterParameter == 0.0_DP ) return
! タイムフィルターを適用
! Apply time filter
!
xyz_UN = ( 1.0 - 2.0 * FilterParameter ) * xyz_UN + FilterParameter * ( xyz_UB + xyz_UA )
xyz_VN = ( 1.0 - 2.0 * FilterParameter ) * xyz_VN + FilterParameter * ( xyz_VB + xyz_VA )
xyz_TempN = ( 1.0 - 2.0 * FilterParameter ) * xyz_TempN + FilterParameter * ( xyz_TempB + xyz_TempA )
xyz_QVapN = ( 1.0 - 2.0 * FilterParameter ) * xyz_QVapN + FilterParameter * ( xyz_QVapB + xyz_QVapA )
xy_PsN = ( 1.0 - 2.0 * FilterParameter ) * xy_PsN + FilterParameter * ( xy_PsB + xy_PsA )
! 計算時間計測一時停止
! Pause measurement of computation time
!
call TimesetClockStop( module_name )
end subroutine TimeFilter
| Variable : | |||
| timefilter_asselin1972_inited = .false. : | logical, save, public
|
| Variable : | |||
| CurStep : | integer, save
|
| Subroutine : |
依存モジュールの初期化チェック
Check initialization of dependency modules
subroutine InitCheck
!
! 依存モジュールの初期化チェック
!
! Check initialization of dependency modules
! モジュール引用 ; USE statements
!
! NAMELIST ファイル入力に関するユーティリティ
! Utilities for NAMELIST file input
!
use namelist_util, only: namelist_util_inited
! 格子点設定
! Grid points settings
!
use gridset, only: gridset_inited
! 物理定数設定
! Physical constants settings
!
use constants, only: constants_inited
! 座標データ設定
! Axes data settings
!
use axesset, only: axesset_inited
! 時刻管理
! Time control
!
use timeset, only: timeset_inited
! 実行文 ; Executable statement
!
if ( .not. namelist_util_inited ) call MessageNotify( 'E', module_name, '"namelist_util" module is not initialized.' )
if ( .not. gridset_inited ) call MessageNotify( 'E', module_name, '"gridset" module is not initialized.' )
if ( .not. constants_inited ) call MessageNotify( 'E', module_name, '"constants" module is not initialized.' )
if ( .not. axesset_inited ) call MessageNotify( 'E', module_name, '"axesset" module is not initialized.' )
if ( .not. timeset_inited ) call MessageNotify( 'E', module_name, '"timeset" module is not initialized.' )
end subroutine InitCheck
| Variable : | |||
| IntStep : | integer, save
|
| Variable : | |||
| PrevStep : | integer, save
|
| Subroutine : |
timefilter_asselin1972 モジュールの初期化を行います. NAMELIST#timefilter_asselin1972_nml の読み込みはこの手続きで行われます.
"timefilter_asselin1972" module is initialized. "NAMELIST#timefilter_asselin1972_nml" is loaded in this procedure.
This procedure input/output NAMELIST#timefilter_asselin1972_nml .
subroutine TimeFiltInit
!
! timefilter_asselin1972 モジュールの初期化を行います.
! NAMELIST#timefilter_asselin1972_nml の読み込みはこの手続きで行われます.
!
! "timefilter_asselin1972" module is initialized.
! "NAMELIST#timefilter_asselin1972_nml" is loaded in this procedure.
!
! モジュール引用 ; USE statements
!
! NAMELIST ファイル入力に関するユーティリティ
! Utilities for NAMELIST file input
!
use namelist_util, only: namelist_filename, NmlutilMsg, NmlutilAryValid
! ファイル入出力補助
! File I/O support
!
use dc_iounit, only: FileOpen
! 種別型パラメタ
! Kind type parameter
!
use dc_types, only: STDOUT ! 標準出力の装置番号. Unit number of standard output
! 宣言文 ; Declaration statements
!
implicit none
integer:: unit_nml ! NAMELIST ファイルオープン用装置番号.
! Unit number for NAMELIST file open
integer:: iostat_nml ! NAMELIST 読み込み時の IOSTAT.
! IOSTAT of NAMELIST read
! NAMELIST 変数群
! NAMELIST group name
!
namelist /timefilter_asselin1972_nml/ FilterParameter, IntStep
!
! デフォルト値については初期化手続 "timefilter_asselin1972#Hs94Init"
! のソースコードを参照のこと.
!
! Refer to source codes in the initialization procedure
! "timefilter_asselin1972#Hs94Init" for the default values.
!
! 実行文 ; Executable statement
!
if ( timefilter_asselin1972_inited ) return
call InitCheck
! デフォルト値の設定
! Default values settings
!
FilterParameter = 0.05_DP
IntStep = 1
CurStep = 0
! NAMELIST の読み込み
! NAMELIST is input
!
if ( trim(namelist_filename) /= '' ) then
call FileOpen( unit_nml, namelist_filename, mode = 'r' ) ! (in)
rewind( unit_nml )
read( unit_nml, nml = timefilter_asselin1972_nml, iostat = iostat_nml ) ! (out)
close( unit_nml )
call NmlutilMsg( iostat_nml, module_name ) ! (in)
if ( iostat_nml == 0 ) write( STDOUT, nml = timefilter_asselin1972_nml )
end if
! IntStep のチェック
! Check "IntStep"
!
if ( IntStep < 1 ) then
call MessageNotify( 'E', module_name, 'IntStep=<%d> must be greater than 0', i = (/ IntStep /) )
end if
! PrevStep の設定
! Configure "PrevStep"
!
PrevStep = - IntStep
! 印字 ; Print
!
call MessageNotify( 'M', module_name, '----- Initialization Messages -----' )
call MessageNotify( 'M', module_name, ' FilterParameter = %f', d = (/ FilterParameter /) )
call MessageNotify( 'M', module_name, ' IntStep = %d', i = (/ IntStep /) )
call MessageNotify( 'M', module_name, '-- version = %c', c1 = trim(version) )
timefilter_asselin1972_inited = .true.
end subroutine TimeFiltInit
| Constant : | |||
| module_name = ‘timefilter_asselin1972‘ : | character(*), parameter
|
| Constant : | |||
| version = ’$Name: dcpam5-20090126 $’ // ’$Id: timefilter_asselin1972.f90,v 1.3 2008-10-06 16:30:12 morikawa Exp $’ : | character(*), parameter
|