Intensity of the second and third OH overtones of H2O2, HNO3, and HO2NO2

The 3 nu(OH) and 4 nu(OH) of H2O, HNO3, and HO2NO2 have been observed. The band strengths of 3 nu(OH) are (7.0 +/- 1.8) x 10(-20) (2.9 +/- 0.7) x 10(- 20), and (3.8 +/- 1.1) x 10(-20) cm(2) molecules(-1) cm(-1) for H2O2 HNO3, and HO2NO2 respectively. Those of 4 nu(OH) are (4.5 +/- 1.6) x 10(-21), (2. 8 +/- 1.0) x 10(-21) and (3.0 +/- 1.8) x 10(-21) cm molecules(-1) cml for H 2O2, HNO3, and HO2NO2, respectively, The uncertainty is for one standard de viation. Assuming excitation of these modes by solar absorption is dissocia tive for HO2NO2, these measurements confirm that this process will play a s mall role in the atmospheric photochemistry of the lower stratosphere.