GFS_025dev
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Last change
on this file since 467460a was
467460a,
checked in by Espen Sollum ATMOS <eso@…>, 3 years ago
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First commit of files from Hachinger
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Property mode set to
100644
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File size:
780 bytes
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| 1 | ! SPDX-FileCopyrightText: FLEXPART 1998-2019, see flexpart_license.txt |
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| 2 | ! SPDX-License-Identifier: GPL-3.0-or-later |
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| 3 | |
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| 4 | real function ew(x) |
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| 5 | |
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| 6 | !**************************************************************** |
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| 7 | !SAETTIGUNGSDAMPFDRUCK UEBER WASSER IN PA. X IN KELVIN. |
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| 8 | !NACH DER GOFF-GRATCH-FORMEL. |
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| 9 | !**************************************************************** |
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| 10 | |
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| 11 | implicit none |
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| 12 | |
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| 13 | real :: x, y, a, c, d |
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| 14 | |
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| 15 | ew=0. |
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| 16 | if(x.le.0.) then |
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| 17 | write(*,*) 'in ew.f90: x=', x |
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| 18 | stop 'sorry: t not in [k]' |
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| 19 | end if |
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| 20 | |
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| 21 | y=373.16/x |
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| 22 | a=-7.90298*(y-1.) |
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| 23 | a=a+(5.02808*0.43429*alog(y)) |
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| 24 | c=(1.-(1./y))*11.344 |
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| 25 | c=-1.+(10.**c) |
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| 26 | c=-1.3816*c/(10.**7) |
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| 27 | d=(1.-y)*3.49149 |
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| 28 | d=-1.+(10.**d) |
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| 29 | d=8.1328*d/(10.**3) |
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| 30 | y=a+c+d |
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| 31 | ew=101324.6*(10.**y) ! Saettigungsdampfdruck in Pa |
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| 32 | |
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| 33 | end function ew |
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