Paterson.cpp File Reference

#include <math.h>
#include "../Numerics/types.h"

Go to the source code of this file.

Functions
IssmDouble	Paterson (IssmDouble temperature)

Function Documentation

Paterson()

IssmDouble Paterson

(

IssmDouble

temperature

)

Definition at line 11 of file Paterson.cpp.

                                           {
 
   IssmDouble B,T;
 
   /*Switch to celsius from Kelvin: */
   T=temperature-273.15;
 
   if(T<=-45.0){
      B=1.e+8*(-0.000292866376675*pow(T+50.,3)+ 0.011672640664130*pow(T+50.,2)  -0.325004442485481*(T+50.)+  6.524779401948101);
   }
   else if((T>=-45.0) && (T<=-40.0)){
      B=1.e+8*(-0.000292866376675*pow(T+45.,3)+ 0.007279645014004*pow(T+45.,2)  -0.230243014094813*(T+45.)+  5.154964909039554);
   }
   else if((T>=-40.0) && (T<=-35.0)){
      B=1.e+8*(0.000072737147457*pow(T+40.,3)+  0.002886649363879*pow(T+40.,2)  -0.179411542205399*(T+40.)+  4.149132666831214);
   }
   else if((T>=-35.0) && (T<=-30.0)){
      B=1.e+8*(-0.000086144770023*pow(T+35.,3)+ 0.003977706575736*pow(T+35.,2)  -0.145089762507325*(T+35.)+  3.333333333333331);
   }
   else if((T>=-30.0) && (T<=-25.0)){
      B=1.e+8*(-0.000043984685769*pow(T+30.,3)+ 0.002685535025386*pow(T+30.,2)  -0.111773554501713*(T+30.)+  2.696559088937191);
   }
   else if((T>=-25.0) && (T<=-20.0)){
      B=1.e+8*(-0.000029799523463*pow(T+25.,3)+ 0.002025764738854*pow(T+25.,2)  -0.088217055680511*(T+25.)+  2.199331606342181);
   }
   else if((T>=-20.0) && (T<=-15.0)){
      B=1.e+8*(0.000136920904777*pow(T+20.,3)+  0.001578771886910*pow(T+20.,2)  -0.070194372551690*(T+20.)+  1.805165505978111);
   }
   else if((T>=-15.0) && (T<=-10.0)){
      B=1.e+8*(-0.000899763781026*pow(T+15.,3)+ 0.003632585458564*pow(T+15.,2)  -0.044137585824322*(T+15.)+  1.510778053489523);
   }
   else if((T>=-10.0) && (T<=-5.0)){
      B=1.e+8*(0.001676964325070*pow(T+10.,3)-  0.009863871256831*pow(T+10.,2)  -0.075294014815659*(T+10.)+  1.268434288203714);
   }
   else if((T>=-5.0) && (T<=-2.0)){
      B=1.e+8*(-0.003748937622487*pow(T+5.,3)+0.015290593619213*pow(T+5.,2)  -0.048160403003748*(T+5.)+  0.854987973338348);
   }
   else{
      B=1.e+8*(-0.003748937622488*pow(T+2.,3)-0.018449844983174*pow(T+2.,2)  -0.057638157095631*(T+2.)+  0.746900791092860);
   }
 
   /*B cannot be negative!*/
   if(B<0) B=1.e+6;
 
   return B;
}