//---------------------------------------------------------------------
/// <summary>
/// Adds frass for a species to the foliar LITTER pools at a site.
/// Assumes that some of the N has been resorbed.
/// </summary>
public static void AddFrassLitter(double inputFrassBiomass, ISpecies species, ActiveSite site)
{
double inputDecayValue = 1.0; // Decay value is calculated for surface/soil layers (leaf/fine root),
// therefore, this is just a dummy value.
if (inputFrassBiomass > 0)
{
//SiteVars.LitterfallC[site] += defoliatedLeafBiomass * 0.47;
//double frassBiomass = Math.Max(0.0, OtherData.frassdepk * defoliatedLeafBiomass);
// Frass C added is a function of defoliated leaf biomass, but adjusted for the CN of litter and frass
// Any C lost is due to insect metabolism
double inputFrassC = inputFrassBiomass * 0.47;
double inputFrassN = inputFrassC / (double)SpeciesData.LeafLitterCN[species];
double actualFrassC = inputFrassN * (double)OtherData.CNratiofrass; // the difference between input and actual is C lost to insect metabolism
double actualFrassBiomass = actualFrassC / 0.47;
//PlugIn.ModelCore.UI.WriteLine("AddFrass.Month={0:0}, inputfrassN={1:0.000}, inputfrassbiomass={2:0.00}, actualfrassbiomass={3:0.00} ", Century.Month, inputFrassN, inputFrassBiomass, actualFrassBiomass);
SiteVars.FrassC[site] += actualFrassC;
LitterLayer.PartitionResidue(
actualFrassBiomass,
inputDecayValue,
OtherData.CNratiofrass,
0.1,
OtherData.StructuralCN,
LayerName.Leaf,
LayerType.Surface,
site);
}
}
//---------------------------------------------------------------------
/// <summary>
/// Adds some biomass for a species to the foliar LITTER pools at a site.
/// Assumes that some of the N has been resorbed.
/// </summary>
public static void AddResorbedFoliageLitter(double foliarBiomass, ISpecies species, ActiveSite site)
{
double inputDecayValue = 1.0; // Decay value is calculated for surface/soil layers (leaf/fine root),
// therefore, this is just a dummy value.
if (foliarBiomass > 0)
{
SiteVars.LitterfallC[site] += foliarBiomass * 0.47;
LitterLayer.PartitionResidue(
foliarBiomass,
inputDecayValue,
SpeciesData.LeafLitterCN[species],
SpeciesData.LeafLignin[species],
OtherData.StructuralCN,
LayerName.Leaf,
LayerType.Surface,
site);
}
}
//---------------------------------------------------------------------
/// <summary>
/// Kills fine roots and add the biomass to the Dead Fine Roots pool.
/// </summary>
public static void AddFineRootLitter(double abovegroundFoliarBiomass, ICohort cohort,
ISpecies species,
ActiveSite site)
{
double fineRootBiomass = CalculateFineRoot(cohort, abovegroundFoliarBiomass);
double inputDecayValue = 1.0; // Decay value is calculated for surface/soil (leaf/fine root),
// therefore, this is just a dummy value.
if (fineRootBiomass > 0)
{
LitterLayer.PartitionResidue(
fineRootBiomass,
inputDecayValue,
SpeciesData.FineRootCN[species],
SpeciesData.FineRootLignin[species],
OtherData.StructuralCN,
LayerName.FineRoot,
LayerType.Soil,
site);
}
}
/// <summary>
/// Grows all cohorts at a site for a specified number of years.
/// Litter is decomposed following the Century model.
/// </summary>
public static ISiteCohorts Run(ActiveSite site,
int years,
bool isSuccessionTimeStep)
{
ISiteCohorts siteCohorts = SiteVars.Cohorts[site];
IEcoregion ecoregion = PlugIn.ModelCore.Ecoregion[site];
for (int y = 0; y < years; ++y)
{
Year = y + 1;
if (Climate.Future_MonthlyData.ContainsKey(PlugIn.FutureClimateBaseYear + y + PlugIn.ModelCore.CurrentTime - years))
{
ClimateRegionData.AnnualWeather[ecoregion] = Climate.Future_MonthlyData[PlugIn.FutureClimateBaseYear + y - years + PlugIn.ModelCore.CurrentTime][ecoregion.Index];
}
SiteVars.ResetAnnualValues(site);
if (y == 0 && SiteVars.FireSeverity != null && SiteVars.FireSeverity[site] > 0)
{
FireEffects.ReduceLayers(SiteVars.FireSeverity[site], site);
}
// Next, Grow and Decompose each month
int[] months = new int[12] {
6, 7, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5
};
if (OtherData.CalibrateMode)
{
//months = new int[12]{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}; This output will not match normal mode due to differences in initialization
months = new int[12] {
6, 7, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5
}
}
;
PlugIn.AnnualWaterBalance = 0;
for (MonthCnt = 0; MonthCnt < 12; MonthCnt++)
{
// Calculate mineral N fractions based on coarse root biomass. Only need to do once per year.
if (MonthCnt == 0)
{
AvailableN.CalculateMineralNfraction(site);
}
Month = months[MonthCnt];
SiteVars.MonthlyAGNPPcarbon[site][Month] = 0.0;
SiteVars.MonthlyBGNPPcarbon[site][Month] = 0.0;
SiteVars.MonthlyNEE[site][Month] = 0.0;
SiteVars.MonthlyResp[site][Month] = 0.0;
SiteVars.MonthlyStreamN[site][Month] = 0.0;
SiteVars.SourceSink[site].Carbon = 0.0;
SiteVars.TotalWoodBiomass[site] = Century.ComputeWoodBiomass(site);
double ppt = ClimateRegionData.AnnualWeather[ecoregion].MonthlyPrecip[Century.Month];
double monthlyNdeposition;
if (PlugIn.AtmosNintercept != -1 && PlugIn.AtmosNslope != -1)
{
monthlyNdeposition = PlugIn.AtmosNintercept + (PlugIn.AtmosNslope * ppt);
}
else
{
monthlyNdeposition = ClimateRegionData.AnnualWeather[ecoregion].MonthlyNDeposition[Century.Month];
}
ClimateRegionData.MonthlyNDeposition[ecoregion][Month] = monthlyNdeposition;
ClimateRegionData.AnnualNDeposition[ecoregion] += monthlyNdeposition;
SiteVars.MineralN[site] += monthlyNdeposition;
double liveBiomass = (double)ComputeLivingBiomass(siteCohorts);
double baseFlow, stormFlow, AET;
SoilWater.Run(y, Month, liveBiomass, site, out baseFlow, out stormFlow, out AET);
PlugIn.AnnualWaterBalance += ppt - AET;
// Calculate N allocation for each cohort
AvailableN.SetMineralNallocation(site);
if (MonthCnt == 11)
{
siteCohorts.Grow(site, (y == years && isSuccessionTimeStep), true);
}
else
{
siteCohorts.Grow(site, (y == years && isSuccessionTimeStep), false);
}
WoodLayer.Decompose(site);
LitterLayer.Decompose(site);
SoilLayer.Decompose(site);
// Volatilization loss as a function of the mineral N which remains after uptake by plants.
// ML added a correction factor for wetlands since their denitrification rate is double that of wetlands
// based on a review paper by Seitziner 2006.
double volatilize = (SiteVars.MineralN[site] * PlugIn.DenitrificationRate);
SiteVars.MineralN[site] -= volatilize;
SiteVars.SourceSink[site].Nitrogen += volatilize;
SiteVars.Nvol[site] += volatilize;
SoilWater.Leach(site, baseFlow, stormFlow);
SiteVars.MonthlyNEE[site][Month] -= SiteVars.MonthlyAGNPPcarbon[site][Month];
SiteVars.MonthlyNEE[site][Month] -= SiteVars.MonthlyBGNPPcarbon[site][Month];
SiteVars.MonthlyNEE[site][Month] += SiteVars.SourceSink[site].Carbon;
SiteVars.FineFuels[site] = (SiteVars.SurfaceStructural[site].Carbon + SiteVars.SurfaceMetabolic[site].Carbon) * 2.0;
}
}
ComputeTotalCohortCN(site, siteCohorts);
return(siteCohorts);
}
