Microclimate
Temperature and relative humidity were measured in winter and summer in
order to test for the effects of UV-filtering and UV-transmitting
windows on microclimate. Neither the winter mean daily low temperature
nor the mean daily high temperature significantly differed between the
UV-filtering and UV-transmitting windows (Table 1). Similarly, the
winter mean daily low RH did not differ significantly between the two
window treatments (Table 1). However, mean daily high RH was
significantly higher under UV-filtering windows (Table 1).
Summer microclimate monitoring included both treatment windows as well
as nearby, un-manipulated site reference measurements. There was no
significant difference in mean daily low temperatures or mean daily high
temperatures among the two treatment windows or site reference plots
(Table 1). Summer mean daily high RH was higher in the site reference
plot (Table 1), although there were no significant differences across
any of the treatment groups. Field treatment did, however, have a
significant effect on mean daily low RH (highest in site reference
plots; P = 0.032, Table 1).