MITgcm_contrib/arnaud_matlab/moist_adiabat.m

%
%   function [TMA] = moist_adiabat(LCL,TLCL); 
%
% Computes the temperature TMA(p) (in K) following
% a moist adiabat profile from the LCL where the
% temperature is TLCL (in K) 
%


   function [TMA] = moist_adiabat(LCL,TLCL); 

% Constants
  RGASdry = 287.04;
  RGASvapor = 461.5;
  PREF = 1000; %in mb
  KM = 1000;
  GRAVI = 9.81;

% Pressure grid
  P = [987.5:-25:0]; %in mb
  DP = 25; %in mb
  NL = 40;

% Pressure integral
  TMA = NaN * ones(1,NL);
  TMA(LCL) = TLCL;
  for l = LCL:NL-1;
    %RGAS = RGASvapor * Q(l) + (1-Q(l))*RGASdry ;%if fancy!!
    RGAS = RGASdry;
    t = TMA(l) - 273.15;
    GAMMAs1 = 6.4 - 0.12*t + (2.5*1.e-05)*t^3; 
    GAMMAs2 = (-2.4 + .001*(t-5)^2) * (1 - P(l)/PREF); 
    GAMMAs = (GAMMAs1+GAMMAs2) / KM;
    DT = - RGAS * TMA(l) * GAMMAs * DP / (GRAVI * P(l)); 
    TMA(l+1) = TMA(l) + DT;
  end
1	%
2	% function [TMA] = moist_adiabat(LCL,TLCL);
3	%
4	% Computes the temperature TMA(p) (in K) following
5	% a moist adiabat profile from the LCL where the
6	% temperature is TLCL (in K)
7	%
8
9
10	function [TMA] = moist_adiabat(LCL,TLCL);
11
12	% Constants
13	RGASdry = 287.04;
14	RGASvapor = 461.5;
15	PREF = 1000; %in mb
16	KM = 1000;
17	GRAVI = 9.81;
18
19	% Pressure grid
20	P = [987.5:-25:0]; %in mb
21	DP = 25; %in mb
22	NL = 40;
23
24	% Pressure integral
25	TMA = NaN * ones(1,NL);
26	TMA(LCL) = TLCL;
27	for l = LCL:NL-1;
28	%RGAS = RGASvapor * Q(l) + (1-Q(l))*RGASdry ;%if fancy!!
29	RGAS = RGASdry;
30	t = TMA(l) - 273.15;
31	GAMMAs1 = 6.4 - 0.12t + (2.51.e-05)*t^3;
32	GAMMAs2 = (-2.4 + .001(t-5)^2) (1 - P(l)/PREF);
33	GAMMAs = (GAMMAs1+GAMMAs2) / KM;
34	DT = - RGAS * TMA(l) * GAMMAs * DP / (GRAVI * P(l));
35	TMA(l+1) = TMA(l) + DT;
36	end