low albedo = dark
high albedo = light
High Emissivity means the planet efficiently gets rid of heat; a strong greenhouse would lead to low emissivity
increases or decreases the size of the thermal reservoir
The Simplest Climate Model
to change this, click on the icon, then click on Table in upper right of window — this allows you to enter exact values for the Solar Constant. Click on OK when you are done.
Earth_Heat(t) = Earth_Heat(t - dt) + (Insolation - Heat_emitted) * dt {NON-NEGATIVE}
INIT Earth_Heat = Surf_Area*Ocean_Depth*Water_Density*heat_capacity*(Initial_Temp+273)
INFLOWS:
Insolation = (Solar_Constant/4)*(1-Albedo)*Surf_Area*3.15E7 {Joules per year} {UNIFLOW}
OUTFLOWS:
Heat_emitted = Emissivity*Surf_Area*SB_constant*(Temp_K^4)*3.15E7 {UNIFLOW}
Albedo = .3
Emissivity = 1 {this includes the greenhouse effect}
flux_in = Insolation/(Surf_Area*3.15E7) {units of W/m2}
flux_out = Heat_emitted/(Surf_Area*3.15E7) {units of W/m2}
heat_capacity = 4184
Initial_Temp = 0
Ocean_Depth = 100 {m of ocean water -- above the thermocline -- involved in seasonal temp changes}
SB_constant = 5.67e-8
Solar_Constant = GRAPH(TIME {1370 W/m2})
(0.00, 1370.00), (3.00, 1370.00), (6.00, 1370.00), (9.00, 1370.00), (12.00, 1370.00), (15.00, 1370.00), (18.00, 1370.00), (21.00, 1370.00), (24.00, 1370.00), (27.00, 1370.00), (30.00, 1370.00)
Surf_Area = 5.1e14
Temp_K = Earth_Heat/(heat_capacity*Surf_Area*Ocean_Depth*Water_Density)
Temperature = Temp_K-273 {°C}
Water_Density = 1000