Table S1. Animal heat budget model parameters
parameter
units
value
εbody, skin longwave infrared emissivity
-
1.0
αbody, skin solar absorptivity
-
0.9
ρbody, flesh density
kg m3
1000
kbody, flesh thermal conductivity
W m-1 °C-1
0.5
Cbody, flesh specific heat capacity
J kg-1 °K-1
4185
Fbody,sky, configuration factor body to sky
-
0.4
Fbody,sub, configuration factor body to substrate
-
0.4
A, lizard surface area
cm2
10.4713𝑊𝑤 0.688 where Ww is wet weight in g
Asil, silhouette area normal to the sun
cm2
3.798𝑊𝑤 0.683 where Ww is wet weight in g
Fsub, fraction of surface area contacting the substrate
-
0.1
Fwet, fraction of surface area that is wet
-
0.0
𝐹𝑂2 , oxygen extraction efficiency
-
0.2
Δresp, temperature difference between expired and
°C
0.1
inspired air
Table S2. Microclimate model parameters. Note that for soil thermal properties, the presence of
‘organic’ cap was assumed for the top 5 cm of the substrate.
parameter
units
value
source
δsub, roughness height of the substrate
m
0.002
assumed
εsub, substrate longwave infrared emissivity
-
0.96
assumed
αsub, substrate solar absorptivity
-
0.90
assumed
ρsub, substrate density
kg m-3
2560
(Campbell & Norm
ksub, substrate thermal conductivity
W m-1 °C-1
2.5 (0.2 top 5cm)
(Campbell & Norm
csub, substrate specific heat capacity
J kg-1 K-1
870 (1920 top 5cm)
(Campbell & Norm
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