Version 3.02

Improved computation efficiency.

Minor bug fixes.

Toolbox/Contents.m

@@ -1,5 +1,5 @@
 % GSW Oceanographic Toolbox 
-% Version 3.01 (R2011a) 15-May-2011
+% Version 3.02 (R2011a) 15-May-2011
 %
 % documentation set
 %  gsw_front_page              - front page to the GSW Oceanographic Toolbox
@@ -213,10 +213,10 @@
 %  gsw_gibbs                 - the TEOS-10 Gibbs function and its derivatives
 %  gsw_SAAR                  - Absolute Salinity Anomaly Ratio (excluding the Baltic Sea)
 %  gsw_Fdelta                - ratio of Absolute to Preformed Salinity, minus 1
-%  gsw_delta_SA_ref          - Absolute Salinity Anomaly ref. value (excluding the Baltic Sea)
+%  gsw_deltaSA_atlas         - Absolute Salinity Anomaly atlas value (excluding the Baltic Sea)
 %  gsw_SA_from_SP_Baltic     - Calculates Absolute Salinity in the Baltic Sea
 %  gsw_SP_from_SA_Baltic     - Calculates Practical Salinity in the Baltic Sea
-%  gsw_infunnel              - "oceanographic funnel" check for the 25-term equation
+%  gsw_infunnel              - "oceanographic funnel" check for the 48-term equation
 %  gsw_entropy_part          - entropy minus the terms that are a function of only SA
 %  gsw_entropy_part_zerop    - entropy_part evaluated at 0 dbar
 %  gsw_interp_ref_cast       - linearly interpolates the reference cast
@@ -229,7 +229,7 @@
 %  The GSW data set.
 %  gsw_data_v3_0        - contains
 %                          (1) the global data set of Absolute Salinity Anomaly Ratio,
-%                          (2) the global data set of Absolute Salinity Anomaly Ref.,                                    
+%                          (2) the global data set of Absolute Salinity Anomaly atlas,                                    
 %                          (3) a reference cast (for the isopycnal streamfunction), 
 %                          (4) two reference casts that are used by gsw_demo 
 %                          (5) three vertical profiles of (SP, t, p) at known long & lat, plus

Toolbox/gsw_Abs_Pressure_from_p.m

@@ -19,7 +19,7 @@
 % AUTHOR: 
 %  Trevor McDougall and Paul Barker                    [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (29th March, 2011) 
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of 

Toolbox/gsw_C3515.m

@@ -17,7 +17,7 @@
 % AUTHOR: 
 %  Trevor McDougall and Paul Barker                    [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (29th March, 2011) 
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  Culkin and Smith, 1980:  Determination of the Concentration of Potassium  

Toolbox/gsw_CT_first_derivatives.m

@@ -34,7 +34,7 @@
 % AUTHOR: 
 %  Trevor McDougall and Paul Barker                    [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (11th April 2011) 
+% VERSION NUMBER: 3.02 (15th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of 

Toolbox/gsw_CT_freezing.m

@@ -31,7 +31,7 @@
 % AUTHOR: 
 %  Trevor McDougall, Paul Barker and Rainer Feistal    [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (4th November, 2011)
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of 
@@ -108,8 +108,7 @@
 %--------------------------------------------------------------------------
 
 % These few lines ensure that SA is non-negative.
-[I_neg_SA] = find(SA < 0);
-if ~isempty(I_neg_SA)
+if any(SA < 0)
     error(' gsw_CT_freezing: SA must be non-negative!')
 end
 
@@ -164,11 +163,9 @@
 CT_freezing = CT_freezing ...
     - saturation_fraction.*(1e-3).*(2.4 - a.*SA).*(1 + b.*(1 - SA./35.16504));
 
-[Iout_of_range] = find(p > 10000 | SA > 120 | ...
-    p + SA.*71.428571428571402 > 13571.42857142857);
-if ~isempty(Iout_of_range)
-    CT_freezing(Iout_of_range) = NaN;
-end
+% set any values that are out of range to be NaN. 
+CT_freezing(p > 10000 | SA > 120 | ...
+    p + SA.*71.428571428571402 > 13571.42857142857) = NaN;
 
 if transposed
     CT_freezing = CT_freezing.';

Toolbox/gsw_CT_from_entropy.m

@@ -22,7 +22,7 @@
 % AUTHOR:  
 %  Trevor McDougall and Paul Barker.                   [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (3rd March, 2011)
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of
@@ -62,11 +62,8 @@
 % Start of the calculation
 %--------------------------------------------------------------------------
 
-% These few lines ensure that SA is non-negative.
-[I_neg_SA] = find(SA < 0);
-if ~isempty(I_neg_SA)
-    SA(I_neg_SA) = 0;
-end
+% This line ensures that SA is non-negative.
+SA(SA < 0) = 0;
 
 pt = gsw_pt_from_entropy(SA,entropy);
 CT = gsw_CT_from_pt(SA,pt);

Toolbox/gsw_CT_from_pt.m

@@ -22,8 +22,7 @@
 % AUTHOR: 
 %  David Jackett, Trevor McDougall and Paul Barker     [ [email protected] ]
 %  
-% VERSION NUMBER: 3.01 (29th March, 2011) 
-%  This function is unchanged from version 2.0 (24th September, 2010).
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of 
@@ -63,11 +62,8 @@
 % Start of the calculation
 %--------------------------------------------------------------------------
 
-% These few lines ensure that SA is non-negative.
-[I_neg_SA] = find(SA < 0);
-if ~isempty(I_neg_SA)
-    SA(I_neg_SA) = 0;
-end
+% This line ensures that SA is non-negative.
+SA(SA < 0) = 0;
 
 cp0 = 3991.86795711963;     % defined in Eqn. (3.3.3) of IOC et al. (2010).
 

Toolbox/gsw_CT_from_rho.m

@@ -43,18 +43,18 @@
 % AUTHOR:
 %  Trevor McDougall & Paul Barker                      [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (21th April, 2011)
+% VERSION NUMBER: 3.02 (15th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of
 %   seawater - 2010: Calculation and use of thermodynamic properties.
 %   Intergovernmental Oceanographic Commission, Manuals and Guides No. 56,
 %   UNESCO (English), 196 pp.  Available from http://www.TEOS-10.org
 %
-%  McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2011:  A 
+%  McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2013:  A 
 %   computationally efficient 48-term expression for the density of 
 %   seawater in terms of Conservative Temperature, and related properties
-%   of seawater.  To be submitted to Ocean Science Discussions. 
+%   of seawater.  To be submitted to J. Atm. Ocean. Technol., xx, yyy-zzz.
 %
 %  The software is available from http://www.TEOS-10.org
 %
@@ -115,40 +115,35 @@
 rec_half_rho_TT = -110.0;
 
 CT = nan(size(SA));
-CT_multiple = nan(size(SA));
+CT_multiple = CT;
 
-[I_SA_p] = find(SA<0 | SA>42 | p <-1.5 | p>12000);
-if ~isempty(I_SA_p)
-    SA(I_SA_p) = NaN;
-end
+% SA out of range, set to NaN.
+SA(SA<0 | SA>42 | p <-1.5 | p>12000) = NaN;
 
 rho_40 = gsw_rho_CT(SA,40*ones(size(SA)),p);
-[I_rho_light] = find((rho - rho_40) < 0);
-if ~isempty(I_rho_light)
-    SA(I_rho_light) = NaN;
-end
+% rho too light, set to NaN.
+SA((rho - rho_40) < 0) = NaN;
 
 CT_max_rho = gsw_CT_maxdensity(SA,p);
 rho_max = gsw_rho(SA,CT_max_rho,p);
 rho_extreme = rho_max;
 CT_freezing = gsw_CT_freezing(SA,p); % this assumes that the seawater is always saturated with air
 rho_freezing = gsw_rho(SA,CT_freezing,p);
-[I_fr_gr_max] = find((CT_freezing - CT_max_rho) > 0);
-rho_extreme(I_fr_gr_max) = rho_freezing(I_fr_gr_max);
-[I_rho_dense] = find(rho > rho_extreme);
-if ~isempty(I_rho_dense)
-    SA(I_rho_dense) = NaN;
-end
+% reset the extreme values
+rho_extreme((CT_freezing - CT_max_rho) > 0) = rho_freezing((CT_freezing - CT_max_rho) > 0);
 
-[I_bad] = find(isnan(SA.*p.*rho));
-if ~isempty (I_bad)
+% set SA values to NaN for the rho's that are too dense.
+SA(rho > rho_extreme) = NaN;
+
+if any(isnan(SA + p + rho))
+    [I_bad] = find(isnan(SA + p + rho));
     SA(I_bad) = NaN;
 end
 
 alpha_freezing = gsw_alpha(SA,CT_freezing,p);
-[I_salty] = find(alpha_freezing > alpha_limit);
 
-if ~isempty(I_salty)
+if any(alpha_freezing > alpha_limit)
+    [I_salty] = find(alpha_freezing > alpha_limit);
     CT_diff = 40*ones(size(I_salty)) - CT_freezing(I_salty);
 
     top = rho_40(I_salty) - rho_freezing(I_salty) ...
@@ -162,20 +157,21 @@
     CT(I_salty) = CT_freezing(I_salty) + 0.5*(-b - sqrt_disc)./a;
 end
 
-[I_fresh] = find(alpha_freezing <= alpha_limit);
-if ~isempty(I_fresh)
+if any(alpha_freezing <= alpha_limit)
+    [I_fresh] = find(alpha_freezing <= alpha_limit);
+
     CT_diff = 40*ones(size(I_fresh)) - CT_max_rho(I_fresh);
     factor = (rho_max(I_fresh) - rho(I_fresh))./ ...
                (rho_max(I_fresh) - rho_40(I_fresh));
     delta_CT = CT_diff.*sqrt(factor);
 
-    [I_fresh_NR] = find(delta_CT > 5);
-    if ~isempty(I_fresh_NR)
+    if any(delta_CT > 5)
+        [I_fresh_NR] = find(delta_CT > 5);
         CT(I_fresh(I_fresh_NR)) = CT_max_rho(I_fresh(I_fresh_NR)) + delta_CT(I_fresh_NR);
     end
-
-    [I_quad] = find(delta_CT <= 5);
-    if ~isempty(I_quad)
+     
+    if any(delta_CT <= 5)
+        [I_quad] = find(delta_CT <= 5);
         CT_a = nan(size(SA));
         % set the initial value of the quadratic solution routes.
         CT_a(I_fresh(I_quad)) = CT_max_rho(I_fresh(I_quad)) + ...
@@ -186,10 +182,8 @@
             factorqa = (rho_max - rho)./(rho_max - rho_old);
             CT_a = CT_max_rho + (CT_old - CT_max_rho).*sqrt(factorqa);
         end
-        [Ifrozen] = find(CT_freezing - CT_a < 0);
-        if ~isempty(Ifrozen)
-            CT_a(Ifrozen) = NaN;
-        end
+
+        CT_a(CT_freezing - CT_a < 0) = NaN;
 
         CT_b = nan(size(SA));
         % set the initial value of the quadratic solution roots.
@@ -203,10 +197,7 @@
         end
 % After seven iterations of this quadratic iterative procedure,
 % the error in rho is no larger than 4.6x10^-13 kg/m^3.
-        [Ifrozen] = find(CT_freezing - CT_b < 0);
-        if ~isempty(Ifrozen)
-            CT_b(Ifrozen) = NaN;
-        end
+        CT_b(CT_freezing - CT_b < 0) = NaN;
     end
 end
 
@@ -226,16 +217,10 @@
 end
 
 if exist('t_a','var')
-    [I_quad] = find(~isnan(CT_a));
-    if ~isempty(I_quad)
-        CT(I_quad) = CT_a(I_quad);
-    end
+    CT(~isnan(CT_a)) = CT_a(~isnan(CT_a));
 end
 if exist('t_b','var')
-    [I_quad] = find(~isnan(CT_b));
-    if ~isempty(I_quad)
-        CT_multiple(I_quad) = CT_b(I_quad);
-    end
+    CT_multiple(~isnan(CT_b)) = CT_b(~isnan(CT_b));
 end
 % After three iterations of this modified Newton-Raphson iteration,
 % the error in rho is no larger than 1.6x10^-12 kg/m^3.

Toolbox/gsw_CT_from_rho_exact.m

@@ -1,6 +1,6 @@
 function [CT,CT_multiple] = gsw_CT_from_rho_exact(rho,SA,p)
 
-% gsw_t_from_rho_exact                     in situ temperature from density
+% gsw_t_from_rho_exact                     in-situ temperature from density
 % =========================================================================
 %
 % USAGE:
@@ -34,7 +34,7 @@
 % AUTHOR:
 %  Trevor McDougall & Paul Barker                      [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (21th April, 2011)
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of

Toolbox/gsw_CT_from_t.m

@@ -25,8 +25,7 @@
 % AUTHOR: 
 %  David Jackett, Trevor McDougall and Paul Barker     [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (27th March, 2011)
-%  This function is unchanged from version 2.0 (24th September, 2010).
+% VERSION NUMBER: 3.02 (13th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of 
@@ -70,14 +69,9 @@
     error('gsw_CT_from_t: Inputs array dimensions arguments do not agree')
 end %if
 
-[Iout_of_range] = find(p < 100 & (t > 80 | t < -12));
-if (~isempty(Iout_of_range))
-    t(Iout_of_range) = NaN;
-end
-[Iout_of_range] = find(p >= 100 & (t > 40 | t < -12));
-if (~isempty(Iout_of_range))
-    t(Iout_of_range) = NaN;
-end
+%Find values that are out of range, set them to NaN. 
+t(p < 100 & (t > 80 | t < -12)) = NaN;
+t(p >= 100 & (t > 40 | t < -12)) = NaN;
 
 if ms == 1
     SA = SA.';

Toolbox/gsw_CT_maxdensity.m

@@ -13,11 +13,11 @@
 %  of seawater is a maximum, at given Absolute Salinity, SA, and sea 
 %  pressure, p (in dbar).  This function uses the computationally-efficient
 %  48-term expression for density in terms of SA, CT and p (McDougall et
-%  al., 2011).
+%  al., 2013).
 %
 %  Note that the 48-term equation has been fitted in a restricted range of 
 %  parameter space, and is most accurate inside the "oceanographic funnel" 
-%  described in McDougall et al. (2011).  The GSW library function 
+%  described in McDougall et al. (2013).  The GSW library function 
 %  "gsw_infunnel(SA,CT,p)" is avaialble to be used if one wants to test if 
 %  some of one's data lies outside this "funnel".  
 %
@@ -45,10 +45,14 @@
 %   UNESCO (English), 196 pp.  Available from http://www.TEOS-10.org
 %    See section 3.42 of this TEOS-10 Manual.  
 %
-%  McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2011:  A 
+%  McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2013:  A 
 %   computationally efficient 48-term expression for the density of 
 %   seawater in terms of Conservative Temperature, and related properties
-%   of seawater.  To be submitted to Ocean Science Discussions. 
+%   of seawater.  To be submitted to J. Atm. Ocean. Technol., xx, yyy-zzz.
+%
+%  McDougall T.J. and S.J. Wotherspoon, 2012: A simple modification of 
+%   Newton’s method to achieve convergence of order "1 + sqrt(2)".
+%   Submitted to Applied Mathematics and Computation. 
 %
 %  The software is available from http://www.TEOS-10.org
 %
@@ -111,8 +115,9 @@
     CT = CT_old - alpha./dalpha_dCT;
 end
 
-% After three iterations of this modified Newton-Raphson iteration, the 
-% error in CT_maxdensity is typically no larger than 1x10^-15 degress C.  
+% After three iterations of this modified Newton-Raphson (McDougall and 
+% Wotherspoon, 2012) iteration, the error in CT_maxdensity is typically no
+% larger than 1x10^-15 degress C.  
 
 CT_maxdensity = CT;
 

Toolbox/gsw_CT_maxdensity_exact.m

@@ -28,7 +28,7 @@
 % AUTHOR: 
 %  Trevor McDougall & Paul Barker                      [ [email protected] ]
 %
-% VERSION NUMBER: 3.01 (3rd April, 2011)
+% VERSION NUMBER: 3.02 (15th November, 2012)
 %
 % REFERENCES:
 %  IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of