half-level pressures:
----------------------------------------------------------------------
  p_bnds(k) = ap_bnds(k) + b_bnds(k)*ps [Pa]

  ps: Surface Air Pressure [Pa]
----------------------------------------------------------------------
  integer,parameter :: max_nlev_alevel = 80

  real(8),parameter :: ap_bnds(max_nlev_alevel+1) = (/ &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  133.0490708351135d0,  &
   364.9022817611694d0,  634.6009254455566d0,  959.7954750061035d0,  &
   1347.678470611572d0,  1790.905952453613d0,  2294.840431213379d0,  &
   2847.483444213867d0,  3468.870544433594d0,  4162.955474853516d0,  &
   4891.880035400391d0,  5671.823501586914d0,  6476.712036132812d0,  &
   7297.469329833984d0,  8122.159576416016d0,  8914.081573486328d0,  &
   9656.181335449219d0,  10329.43572998047d0,  10912.63809204102d0,  &
   11369.64797973633d0,  11681.15463256836d0,  11845.12481689453d0,  &
   11878.50646972656d0,  11800.75531005859d0,  11634.85717773438d0,  &
   11403.83834838867d0,  11128.02810668945d0,  10823.34442138672d0,  &
   10500.59967041016d0,  10165.63644409180d0,  9820.027160644531d0,  &
   9462.145233154297d0,  9088.394165039062d0,  8705.790710449219d0,  &
   8307.009124755859d0,  7893.966674804687d0,  7468.717193603516d0,  &
   7033.487701416016d0,  6590.670776367187d0,  6142.877578735352d0,  &
   5660.869979858398d0,  5182.970046997070d0,  4727.610015869141d0,  &
   4294.559860229492d0,  3883.670043945312d0,  3494.860076904297d0,  &
   3128.089904785156d0,  2783.379936218262d0,  2460.759925842285d0,  &
   2160.269927978516d0,  1881.920051574707d0,  1625.679969787598d0,  &
   1391.450023651123d0,  1179.020023345947d0,  988.0700111389160d0,  &
   818.1200027465820d0,  668.5200214385986d0,  538.4500026702881d0,  &
   426.9000053405762d0,  332.6699972152710d0,  254.3900012969971d0,  &
   190.5500054359436d0,  139.5400047302246d0,  99.69999790191650d0,  &
   69.33000087738037d0,  46.81000113487244d0,  30.59999942779541d0,  &
   19.31000053882599d0,  11.72000020742416d0,  6.819999963045120d0,  &
   3.790000081062317d0,  1.999999955296516d0,  0.000000000000000d0   &
&  /)

  real(8),parameter :: b_bnds(max_nlev_alevel+1) = (/ &
   1.000000000000000d0,  9.969999790191650d-1, 9.940000176429749d-1, &
   9.890000224113464d-1, 9.819999933242798d-1, 9.720000028610229d-1, &
   9.599999785423279d-1, 9.459999799728394d-1, 9.266695380210876d-1, &
   9.043509960174561d-1, 8.796539902687073d-1, 8.514020442962646d-1, &
   8.195232152938843d-1, 7.850909233093262d-1, 7.480515837669373d-1, &
   7.095251679420471d-1, 6.683112978935242d-1, 6.243704557418823d-1, &
   5.800812244415283d-1, 5.342817902565002d-1, 4.882328808307648d-1, &
   4.420253038406372d-1, 3.957784175872803d-1, 3.508591949939728d-1, &
   3.074381947517395d-1, 2.657056450843811d-1, 2.258736193180084d-1, &
   1.893035173416138d-1, 1.568834483623505d-1, 1.292423456907272d-1, &
   1.058217361569405d-1, 8.630114793777466d-2, 7.024332880973816d-2, &
   5.715431645512581d-2, 4.653471708297729d-2, 3.791625797748566d-2, &
   3.088460303843021d-2, 2.509043924510479d-2, 2.025233022868633d-2, &
   1.615484803915024d-2, 1.264325808733702d-2, 9.694494307041168d-3, &
   7.185111753642559d-3, 5.085833370685577d-3, 3.367024473845959d-3, &
   1.998520921915770d-3, 9.492950630374253d-4, 1.873250585049391d-4, &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0,  &
   0.000000000000000d0,  0.000000000000000d0,  0.000000000000000d0   &
&  /)