Analysis of tropical convective transport of trace gases and lightning NOx production during the TC4 mission using the GMI model
Our attention then shifts to the distribution and production of trace gases within the convective column. Using trace gas observations from the TC4 aircraft (DC-8 and WB-57), we analyze the efficacy of the GMI model in reproducing observed profiles. We consider ozone and carbon monoxide, which are nearly conserved on the time scale of convective cells. We find that in undisturbed regions, the models have good agreement with in situ measurements, but disturbed regions show less agreement which is consistent with likely errors in the model mass flux and detrainment profiles. NOx is also considered which is created in situ by lightning and redistributed throughout the column. We find significant differences in NOx partitioning between in situ observations and the model. We also compare the total column content and vertical profiles produced by the model to satellite datasets.