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radio_decay.F90
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!
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! $Id $
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!
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SUBROUTINE
radio_decay
(radio,rnpb,dtime,tautr,tr,d_tr)
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!
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! Caluclate radioactive decay for all tracers with radio(it)=true
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!
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USE
dimphy
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USE
infotrac
, ONLY
: nbtr
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USE
traclmdz_mod
, ONLY
: id_rn, id_pb
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IMPLICIT NONE
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!-----------------------------------------------------------------------
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! Auteur(s): AA + CG (LGGE/CNRS) Date 24-06-94
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! Objet: Calcul de la tendance radioactive des traceurs type radioelements
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! Cas particulier pour le couple radon-plomb : Le radon decroit en plomb
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!-----------------------------------------------------------------------
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!
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! Entrees
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!
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LOGICAL
,
DIMENSION(nbtr)
,
INTENT(IN)
:: radio
! .true. = traceur radioactif
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LOGICAL
,
INTENT(IN)
:: rnpb
! .true. = decroissance RN = source PB
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REAL
,
INTENT(IN)
::
dtime
! Pas de temps physique (secondes)
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REAL
,
DIMENSION(nbtr)
,
INTENT(IN)
:: tautr
! Constante de decroissance radioactive
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REAL
,
DIMENSION(klon,klev,nbtr)
,
INTENT(IN)
:: tr
! Concentrations traceurs U/kgA
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!
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! Sortie
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!
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REAL
,
DIMENSION(klon,klev,nbtr)
,
INTENT(OUT)
:: d_tr
! Tendance de decroissance radioactive
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!
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! Locales
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!
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INTEGER
::
i
,
k
,
it
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DO
it
= 1,nbtr
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d_tr(:,:,
it
) = 0.
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IF
( radio(
it
) )
THEN
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IF
(tautr(
it
) .GT. 0.)
THEN
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DO
k
= 1,
klev
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DO
i
= 1,klon
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d_tr(
i
,
k
,
it
) = - tr(
i
,
k
,
it
) *
dtime
/ tautr(
it
)
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END DO
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END DO
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END IF
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END IF
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END DO
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!-------------------------------------------------------
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! Cas particulier radon (id_rn) => plomb (id_pb)
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!-------------------------------------------------------
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IF
( rnpb )
THEN
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DO
k
= 1,
klev
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DO
i
= 1,klon
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d_tr(
i
,
k
,id_pb) = d_tr(
i
,
k
,id_pb) - d_tr(
i
,
k
,id_rn)
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ENDDO
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ENDDO
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ENDIF
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END SUBROUTINE
radio_decay
libf
phylmd
radio_decay.F90
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