A comparison of two schemes for the convective transport of chemical species in a Lagrangian global chemistry model

W. J. Collins, R. G. Derwent, C. E. Johnson, D. S. Stevenson

Research output: Contribution to journalArticlepeer-review

Abstract

We have developed a detailed parametrization scheme to represent the effects of subgrid-scale convective transport in a three-dimensional chemistry-transport model (CTM). The CTM utilizes the meteorological fields generated by a general-circulation model (GCM) to redistribute over 70 chemical species. The convective transport is implemented using the convective mass fluxes, entrainment rates and detrainment rates from the GCM.

We compare the modelled distributions of 222Rn with observations. This shows that the vertical profile of this species is affected by the choice of convective-transpo rt parametrization. The new parametrization is found to improve significantly the simulation of 222Rn over the summertime continents
Original languageEnglish
Pages (from-to)991-1009
Number of pages19
JournalQuarterly Journal of the Royal Meteorological Society
Volume128
Issue number581
DOIs
Publication statusPublished - Apr 2002

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