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IX-A-I. Cross sections for CH4 and various oxidation products of methane spectra for methane from Okabe and Becker . The actinic flux curves for lower troposphere and mid stratosphere are calculated for zenith angle 45 and altitudes of 1 and 45 km, respectively.

IX-A-S. Comparison of the overlap of the spectral -values for acetone and NO2 . The calculations were made for clear tropospheric skies at an altitude of 0.5 m and overhead ozone column of 350 DU.

IX-B-1. Comparison of the absorption spectra of the C1-C5 straight-chain aldehydes data for CH2O are from MeUer and Moortgat .

IX-B-12. Cross sections versus wavelength for three alkyl substituted aldehydes

IX-B-13. Estimates of the primary quantum yield of process in 2-methylpropanal

IX-B-14. Estimated photolysis frequencies for 2-methylpropanal as a function of solar zenith angle .

IX-B-15. Plot of the wavelength dependence of for pentanal at zero pressure using quenching constants like those of the small aldehydes, black triangles. The light-gray, dashed curve gives the absorption spectrum of pentanal.

IX-B-16. Plot of the estimated j-values for processes .

IX-B-17. Quantum yields of HCO formation for 3-methylbutanal. Filled symbols are data reported at zero pressure . The dashed-gray curve gives the approximate absorption spectrum of 3-methylbutanal.

IX-B-18. Approximate photolysis frequencies versus solar zenith angle calculated for 3-methylbutanal for a cloudless day in the lower troposphere with an overhead ozone column of 350 DU. The solid curve for y

IX-B-2. Comparison of quantum yields . The absorption spectrum of CH2O is given by the light-gray curve.

IX-B-20. Approximate photolysis frequencies versus solar zenith angle calculated for 2,2-dimethylpropanal for a cloudless day in the lower troposphere with an overhead ozone column of 350 DU. The solid curve is calculated using the Zhu et al. suggests that there may be a significantly greater quenching by air than has been assumed in the calculations shown by the dashed curve.

IX-B-21. Quantum yields of primary process .

IX-B-22. Approximate photolysis frequencies for primary processes .

IX-B-23. Plot of the quantum yield of process .

IX-B-24. Plot of the recommended photolysis frequencies versus solar zenith angle for heptanal primary processes

IX-B-3. Comparison of the quantum yields . The absorption spectrum of CH2O is given by the light-gray curve.

IX-B-4. Recommended y-values

IX-B-6. Estimates of the quantum yields of the primary processes in acetaldehyde. p 0II . The absorption spectrum of CH3CHO is given by the dashed-gray line.

IX-B-7. Photolysis frequencies for the primary processes .

IX-B-8. Plot of wavelength dependence of p estimates for the primary processes in propanal. C2H5CHO hv C2H5 HCO , open, inverted triangle. The absorption spectrum of C2H5CHO is given by the light-gray curve.

IX-B-9. Photolysis freqencies as a function of solar zenith angle for the photodecomposition of propanal by process .

IX-B-I I. Plot of the photolysis frequencies as a function of solar zenith angle for the primary processes .

IX-B-IO. Quantum yields of photodecomposition by the various primary processes in butanal photolysis

IX-B-S. The effect of altitude in the atmosphere on the y-values for processes .



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