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guez |
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module test_disvert_m |
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implicit none |
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contains |
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subroutine test_disvert |
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! Author: Lionel GUEZ |
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! This procedure tests the order of pressure values at half-levels |
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! and full levels, and writes the vertical coordinates to files |
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! "half_level.csv" and "full_level.csv" for a reference surface |
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! pressure. We arbitrarily choose to test ngrid values of the |
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! surface pressure, which sample possible values on Earth. |
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use abort_gcm_m, only: abort_gcm |
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use comconst, only: kappa, cpp |
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guez |
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use disvert_m, only: ap, bp, preff, presnivs, s |
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guez |
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use dimensions, only: llm |
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guez |
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use exner_hyb_m, only: exner_hyb |
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use jumble, only: new_unit |
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integer i, unit, l |
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integer, parameter:: ngrid = 8 |
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real p(ngrid, 1, llm + 1) ! pressure at half-level, in Pa |
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real z(llm) ! pressure-altitude at half-level (km) |
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real pks(ngrid, 1) ! exner function at the surface, in J K-1 kg-1 |
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real pk(ngrid, 1, llm) ! exner function at full level, in J K-1 kg-1 |
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real ps(ngrid, 1) ! surface pressure, in Pa |
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real p_lay(ngrid, llm) ! pressure at full level, in Pa |
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real, parameter:: delta_ps = 6e4 / (ngrid - 2) ! in Pa |
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!--------------------- |
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print *, "Call sequence information: test_disvert" |
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guez |
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ps(:, 1) = [(5e4 + delta_ps * i, i = 0, ngrid - 2), preff] |
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guez |
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forall (l = 1: llm + 1) p(:, 1, l) = ap(l) + bp(l) * ps(:, 1) |
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call exner_hyb(ps, p, pks, pk) |
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p_lay = preff * (pk(:, 1, :) / cpp)**(1. / kappa) |
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guez |
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! Write distribution for the reference surface pressure (which is |
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! surface pressure at index ngrid): |
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guez |
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z = 7. * log(preff / p(ngrid, 1, :llm)) |
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call new_unit(unit) |
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open(unit, file="half_level.csv", status="replace", action="write") |
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guez |
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! Title lines: |
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write(unit, fmt=*) 'hPa "" "" hPa km' |
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write(unit, fmt=*) 'ap bp s pressure z' |
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guez |
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do l = 1, llm |
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write(unit, fmt=*) ap(l) / 100., bp(l), s(l), p(ngrid, 1, l) / 100., z(l) |
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end do |
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close(unit) |
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print *, 'The file "half_level.csv" has been created.' |
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open(unit, file="full_level.csv", status="replace", action="write") |
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guez |
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! Title lines: |
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write(unit, fmt=*) '"pressure at full level from Exner function for a ', & |
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'reference surface pressure" altitude "approximate pressure at ', & |
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'full level for a reference surface pressure" "layer thickness"' |
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write(unit, fmt=*) 'hPa km hPa km' |
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write(unit, fmt=*) 'p_lay z presnivs delta_z' |
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guez |
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do l = 1, llm - 1 |
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write(unit, fmt=*) p_lay(ngrid, l) / 100., & |
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7. * log(preff / p_lay(ngrid, l)), presnivs(l) / 100., z(l+1) - z(l) |
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end do |
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write(unit, fmt=*) p_lay(ngrid, llm) / 100., & |
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guez |
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7. * log(preff / p_lay(ngrid, llm)), presnivs(llm) / 100., "NaN" |
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guez |
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close(unit) |
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print *, 'The file "full_level.csv" has been created.' |
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guez |
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! Are pressure values in the right order? |
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if (any(p(:, 1, :llm) <= p_lay .or. p_lay <= p(:, 1, 2:))) then |
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! List details and stop: |
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do l = 1, llm |
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do i = 1, ngrid |
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if (p(i, 1, l) <= p_lay(i, l)) then |
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print 1000, "ps = ", ps(i, 1) / 100., "hPa, p(level ", l, & |
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") = ", p(i, 1, l) / 100., " hPa <= p(layer ", l, ") = ", & |
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p_lay(i, l) / 100., " hPa" |
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end if |
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if (p_lay(i, l) <= p(i, 1, l+1)) then |
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print 1000, "ps = ", ps(i, 1) / 100., & |
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"hPa, p(layer ", l, ") = ", p_lay(i, l) / 100., & |
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" hPa <= p(level ", l + 1, ") = ", & |
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p(i, 1, l + 1) / 100., " hPa" |
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end if |
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end do |
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end do |
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guez |
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call abort_gcm("test_disvert", "bad order of pressure values") |
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guez |
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end if |
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guez |
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1000 format (3(a, g11.4, a, i0)) |
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guez |
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end subroutine test_disvert |
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end module test_disvert_m |
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