The paper presents the effect of O3 depletion on OH (8,3) band. It is
shown that Bates-Nicolet theory for the excitation of OH band is predo
minant excitation process. Calculations based on chemical kinetics sho
w that the intensity of OH (8,3) band will also be effected due to the
depletion of O3 concentration. O3 is depleted everywhere specially at
Antarctica. Intensity of OH (8,3) band is calculated theoretically fo
r Halley Bay (76-degrees S, 27-degrees W), British Antarctic survey st
ation during the period 1973 to 1984.