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generic_parameters.m
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% Vaganov-Shashkin Tree Ring Growth Model (VSM) Parameters
% option to display program header and progress
parameters.display = 0; % set to 1 to write headers and program progress to screen, 0 for improved speed and no screen output
% Main Program and Growth Block Parameters
% Piecewise growth function parameters for temperature
parameters.Tf(1) = 5.0000; % minimum temperature (C) for growth
parameters.Tf(2) = 18.0000; % growth rate is max in the range T2-T3 (lower optimal temperature, C)
parameters.Tf(3) = 24.0000; % growth rate is max in the range T2-T3 (upper optimal temperature, C)
parameters.Tf(4) = 31.0000; % maximum temperature (C) for growth
% Piecewise growth function parameters for soil moisture
parameters.Wf(1) = 0.0400; % minimum soil moisture for growth (v/v)
parameters.Wf(2) = 0.2000; % the growth rate is max in range W2-W3 (lower optimal soil moisture, v/v)
parameters.Wf(3) = 0.8000; % the growth rate is max in range W2-W3 (upper optimal soil moisture, v/v)
parameters.Wf(4) = 0.9000; % growth is stopped at this soil moisture (v/v)
parameters.SNo = 0.0000; % initial snowpack (mm)
parameters.Wo = 0.0900; % initial soil moisture (v/v)
parameters.Wmax = 0.3500; % maximum soil moisture (field capacity, (v/v)
parameters.Wmin = 0.0400; % minimum soil moisture (wilting point, v/v)
parameters.rootd = 1000.000; % the root/soil melt depth (mm)
parameters.rated = 0.0010; % the rate of water drainage from soil
parameters.Pmax = 20.0000; % maximum rate of infiltration water into soil (mm/day)
% interception and transpiration parameters
parameters.k(1) = 0.7200; % k1 (1-k1) is the interception precipitation by the tree crown
parameters.k(2) = 0.1200; % 1st coefficient for calculation the transpiration
parameters.k(3) = 0.1750; % 2nd coefficient for calculation the transpiration
% soil and snow melting parameters
parameters.Tm = 0.000; % sum of temperature for start soil melting (C)
parameters.a(1) = 20.0000; % 1st coefficient of soil melting
parameters.a(2) = 0.0060; % 2nd coefficient of soil melting
parameters.Tg = 60.0000; % sum of temperature to start growth (C)
parameters.SNr = 1.0000; % the rate of snow melting (mm/C/day)
parameters.SNmt = 0.0000; % minimum temperature for snow melting
% Some switches and variable storage
parameters.K(1) = 0; % soil melting switch: yes = 1; no = 0
parameters.K(4) = 1; % snow melting switch: yes = 1; no = 0
parameters.K(8) = 50; % Maximum duration (days) of latewood formation
parameters.K(9) = 10; % the period (days) over which to sum temperature to calculate start of growth
parameters.K(10) = 10; % the period (days) over which to sum temperature to calculate start soil melting
% Parameters for Cambial Block
parameters.ndc = 1; % Use previous cambium for following year? 1 = yes (dynamic cambium), 0 = no(static);
% Growth rate parameters
parameters.b(1) = .04; % the critical growth rate (Vcr or Vs)
parameters.b(4) = 0.8; % %he correction of growth rate (Gr*b(4))
parameters.b(5) = 0.8; % The correction of Vo(j*b(5)) and Vmin(j*b(5))
parameters.b(6) = .13; % Vo(j)= b(6)*j+b(7)
parameters.b(7) = .25; % b(7) and b(6) determine the fuction Vo(j)
parameters.b(8) = 2.50; % Vmin(j)=(EXP((b(8)+j)*0.4)-5.0)*b(9)
parameters.b(9) = 0.015; % b(8) and b(9) determine the fuction Vmin(j)
parameters.b(10) = 2.00; % The growth rate in the S, G2 & M phases
parameters.b(11) = 8.00; % The maximum size of a cell in the G1 phase (SIG1)
parameters.b(12) = 9.00; % The maximum size of a cell in the S phase
parameters.b(13) = 9.50; % The maximum size of a cell in the G2 phase
parameters.b(14) = 10.00; % The maximum size of a cell in the M phase (SIM)
parameters.b(15) = 0.2; % The time step in cambium model (1/b(15)) = number of c-cycles/day)