Some aspects of the seasonal variation of carbon dioxide and ozone

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Abstract
An attempt is made to estimate the seasonal source function, Q, of CO2 on the basis of data for the biosphere, provided by Lieth, and for other sources. The variation of soil respiration appears to be the most uncertain factor. The resulting CO2 variations in the atmosphere are calculated for horizontal exchange coefficients, K, which vary with latitude. Comparison with observations given by Bolin & Keeling shows that the results are not very sensitive with respect to the assumed variations of Q and of K with latitude. Previous results on the 03 budget are used to calculate seasonal variations of tropospheric 03 for stratospheric injection rates, and K values which vary with latitude. It is concluded that tropospheric 03 may be a useful tracer for the study of the global exchange mechanisms between stratosphere and troposphere, and of related problems. DOI: 10.1111/j.2153-3490.1968.tb00383.x

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