NPPCalcNCEAS

The class NPPCalcNCEASMiami is derived from NPPCalc and calculates NPP values from climate data according to the NCEAS model.

It not only uses temperature and precipitation but also land cover class (here we use “grass”, “bush” and “tree”). To use it you have to estimate the proportion of each of the classes at each cell.

Code:
NPPCalcNCEAS.h
NPPCalcNCEAS.cpp

Public Methods

constructor

NPPCalcNCEAS(WELL512 **apWell, double *pdWeights);
apWELL

Array of WELL512 random number generators.

pdWeights

Array of size 3 with weights for “grass”, “bush” and “tree”.

Stores the RNG and the weights-

destructor

virtual ~NPPCalcNCEAS();

The destructor deletes the array of weights.

calcNPP

virtual double calcNPP(double *dT, double *dP, int iNum, int iStride, double *dOut, double *dVariance=0);
dT

Array of temperatures (average annual temperatrures in degrees Celsius).

dP

Array of precipitation values (total annual rainfall in mm).

iNum

Number of element in arrays (dT and dP are supposed to have the same size).

dOut

Output array.

dVariance

Jiggle the result to achieve a certain variance.

Fills an array with NPP values (gC/m2/year) calculated according to the NCEAS Model from the provided Temperature and Precipitation values, taking into account weighted comtributions from “grass”, “bush”, and “tree”.

calcNPP

virtual double calcNPP(double dT, double dP, double dVariance=0);
dT

Temperature value (average annual temperature in degrees Celsius).

dP

Precipitation value (total annual rainfall in mm)

Returns an NPP value (gC/m2/year)calcvulated according to the NCEAS Model from the provided Temperature and Precipitation values, taking into account weighted comtributions from “grass”, “bush”, and “tree”.

Returns the maximum NPP value found.

calcGrassNPP

double calcGrassNPP(double *dT, double *dP, int iNum, int iStride, double *dOut, double *adVariance=0);
dT

Array of temperatures (average annual temperatrures in degrees Celsius).

dP

Array of precipitation values (total anmnual rainfall in mm).

iNum

Number of element in arrays (dT and dP are supposed to have the same size).

dOut

Output array.

dVariance

Jiggle the result to achieve a certain variance.

Fills an array with the grass contribution NPP values (gC/m2/year) calculated according to the NCEAS Model from the provided Temperature and Precipitation values.

Returns the maximum NPP value found.

destructor

double calcBushNPP(double *dT, double *dP, int iNum, int iStride, double *dOut, double *adVariance=0);
dT

Array of temperatures (average annual temperatrures in degrees Celsius).

dP

Array of precipitation values (total anmnual rainfall in mm).

iNum

Number of element in arrays (dT and dP are supposed to have the same size).

dOut

Output array.

dVariance

Jiggle the result to achieve a certain variance.

Fills an array with the bush contribution NPP values (gC/m2/year) calculated according to the NCEAS Model from the provided Temperature and Precipitation values.

Returns the maximum NPP value found.

destructor

double calcTreeNPP(double *dT, double *dP, int iNum, int iStride, double *dOut, double *adVariance=0);
dT

Array of temperatures (average annual temperatrures in degrees Celsius).

dP

Array of precipitation values (total anmnual rainfall in mm).

iNum

Number of element in arrays (dT and dP are supposed to have the same size).

dOut

Output array.

dVariance

Jiggle the result to achieve a certain variance.

Fills an array with the tree contribution NPP values (gC/m2/year) calculated according to the NCEAS Model from the provided Temperature and Precipitation values.

Returns the maximum NPP value found.