;
;jeff snider, univeristy of wyoming, march 2006
;
pro start_moist_isentrope_from_cloudbase
;
common  constants, gascon, rho_h2o, mw_nh42so4, rho_nh42so4, sigma_0,      $
        sigma_t, dsigmadmolality_nh42so4, dsigmadmolality_nacl, mw_h2o,    $
        mw_nacl, rho_nacl, tkmelt, c_nh42so4, a_nh42so4, c_nacl, a_nacl,   $
        cp_air_o, cp_h2o_o, mw_air, gravity, p0, alpha, beta_local,        $
        gascon_h2o, cw_h2o_o, tk_o, lv_o, ew_o, tk_aerosol, salt_type,     $
        epsilon, c_twomey, k_twomey, aerosol_type, right_tail,             $
        gascon_air, tc_base, tk_base, p_base, h_start, hmax,               $
        r0, dt, rmin, rmax, coef, epsilon_aerosol, specific_volume_meas,   $
        nchan, mw_salt, rho_salt, a_salt, c_salt, specific_volume_base,    $
        dsigmadmolality_salt, rho_insoluble, volume_insoluble_to_soluble,  $
        mixrat_tot_1,r_1,geo_sigma_1,mixrat_tot_2,r_2,geo_sigma_2,         $
        tk_start,p_start,sratio_start,mixrat_tot_3,r_3,geo_sigma_3
;
out = dblarr(10)
in  = dblarr(10)
xguess_local = fltarr(10)
;
;initial guesses
;
xguess_local(0) = 1.d-3
xguess_local(1) = 100.d
xguess_local(2) = 1.d-3
xguess_local(3) = 100.d
xguess_local(4) = p_base
xguess_local(5) = tk_base
xguess_local(6) = cp_air_o*alog(tk_base/tk_o)
xguess_local(7) = p_base
xguess_local(8) = cp_air_o*alog(tk_base/tk_o)
xguess_local(9) = p_base
;
out = newton(xguess_local, 'moist_isentrope_from_cloudbase', /double)
;
p_start = out(4)
tk_start = out(5)
;
return
;
end