Article Figures & Data
Figures
- Figure 1.
Input variables, procedures in each module, and output variables from Eco.
- Figure 2.
Flowchart to perform sensitivity analyses.
- Figure 3.
Bin and quantile regression process: (a) scatterplot of PAR vs Vd of NO2; (b) scatterplot divided into 10 bins, and each bin represented as a boxplot with median values shown as a red star; and (c) regression curve fit to the median values to express a specific input-output relationship.
- Figure 4.
Output from MOAT analysis showing standard deviation of elementary effect (σ) versus the mean of the absolute value of the elementary effect (μ *) for Eco-B (a) isoprene and (b) monoterpenes, Eco-C (c) carbon storage and (d) sequestration, and Eco-D dry deposition velocity (Vd) for (e) NO2, (f) SO2, and (g) O3.
- Figure 5.
Sensitivity measures (Si and STi) of (a) isoprene and (b) monoterpenes emissions, (c) carbon storage and (d) sequestration, and dry deposition velocity (Vd) for (e) NO2, (f) SO2, and (g) O3.
- Figure 6.
Relationships between Vd and PAR.
Tables
Module Output variable Unit Description Eco-B Isoprene μgC/hr Isoprene emission Eco-B Monoterpenes μgC/hr Monoterpenes emission Eco-C Carbon storage kg Carbon storage Eco-C Carbon gross sequestration kg/yr Annual gross carbon sequestration Eco-D Vd of NO2 cm/s Dry deposition velocity of nitrogen dioxide (NO2) Eco-D Vd of SO2 cm/s Dry deposition velocity of sulfur dioxide (SO2) Eco-D Vd of O3 cm/s Dry deposition velocity of ozone (O3) - Table 2.
Summary statistics of input variables (each integer represents one category for categorical variables).
Module Parameter Type Mean Standard deviation Minimum Maximum Distribution P-value for Kolmogorov–Smirnov Test Eco-B Genus Categorical Uniform Leaf biomass (kg) Continuous 8.18 18.5 0 267 Lognormal 0.19 PAR (W/m2) Continuous 84.3 122 0 483 Gamma 0.08 Temperature (°C) Continuous 13.3 10.1 −10 37.2 Gumbel 0.09 Eco-C Species Categorical Uniform DBH (cm) Continuous 16.3 18.3 2.5 122 Lognormal 0.12 Height (m) Continuous 7 4.98 1.2 30.5 Lognormal 0.1 Land use Categorical 1 8 Uniform Tree condition Categorical 0 6 Uniform CLE* Categorical 0 5 Uniform Eco-D LAI Continuous 5.8 1.7 2 10 Uniform Pressure (Mbar) Continuous 1010 7.79 978 1030 Lognormal 0.05 PAR (W/m2) Continuous 84.3 122 0 483 Gamma 0.08 Relative humidity (%) Continuous 61 19 8 100 Beta 0.04 Temperature (°C) Continuous 13.3 10.1 −10 37.2 Gumbel 0.09 Wind speed (m/s) Continuous 5.27 2.83 0 20.6 Weibull 0.09 ↵* CLE affects the calculation of leaf biomass and therefore is also employed as an input parameter for Eco-B.
Height Pressure PAR Relative humidity Temperature DBH 0.66 Pressure 1.00 PAR 0.14 1.00 Relative humidity −0.24 −0.28 1.00 Temperature 0.04 0.58 −0.10 1.00 - Table 4.
Bin quantile regression analysis of i-Tree Eco-B, C, and D outputs for most important input variables.
Module Output variable Y Input variable X Regression equation Regression form Adjusted R2 Eco-B Isoprene Leaf biomass Y = 0.16 + 1.32X – 0.18X2 Concave 0.99 Eco-B Isoprene Temperature Y = −0.45 + 0.82X + 0.49X2 Convex 0.96 Eco-B Isoprene PAR Y = 0.94X Linear 0.87 Eco-B Isoprene CLE Y = 0.95X Linear 0.87 Eco-B Monoterpenes Leaf biomass Y = 0.34 + 1.66X – 0.38X2 Concave 1.00 Eco-B Monoterpenes Temperature Y = −0.35 + 0.89X + 0.39X2 Convex 0.99 Eco-B Monoterpenes CLE Y = 0.89X Linear 0.74 Eco-C Carbon storage DBH Y = −0.18 + 0.65X + 0.2X2 Convex 0.99 Eco-C Carbon gross sequestration DBH Y = 0.99X Linear 0.98 Eco-C Carbon gross sequestration Condition Y = 0.91X Linear 0.78 Eco-C Carbon gross sequestration CLE Y = 0.82X Linear 0.59 Eco-D Vd,NO2 PAR Y = 0.42 + 1.148X – 0.467X2 Concave 0.94 Eco-D Vd,NO2 Relative humidity Y = 0.77X Linear 0.55 Eco-D Vd,NO2 LAI Y = 0.99X Linear 0.98 Eco-D Vd,NO2 Temperature Y = 0.2 + 0.97X – 0.22X2 Concave 0.96 Eco-D Vd,SO2 PAR Y = 0.35 + 1.15X – 0.39X2 Concave 0.99 Eco-D Vd,SO2 Relative humidity Y = 0.86X Linear 0.71 Eco-D Vd,SO2 Temperature Y = 0.15 + 0.98X – 0.16X2 Concave 0.98 Eco-D Vd,SO2 LAI Y = 0.975X Linear 0.95 Eco-D Vd,O3 PAR Y = 0.37 + 1.16X – 0.41X2 Concave 0.98 Eco-D Vd,O3 Relative humidity Y = 0.85X Linear 0.69 Eco-D Vd,O3 LAI Y = 0.9775X Linear 0.95 Eco-D Vd,O3 Temperature Y = 0.15 + 0.98X – 0.17X2 Concave 0.98
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