Lightning and convection parameterisations - uncertainties in global modelling
By H. Tost, Patrick Jöckel, J. Lelieveld. 2007
190 citations recorded by the source corpus.
The simulation of convection, lightning and consequent NO x emissions with global atmospheric chemistry models is associated with large uncertainties since these processes are heavily parameterised. Each parameterisation by itself has deficiencies and the combination of these substantially increases the uncertainties compared to the individual parameterisations. In this study several combinations of state-of-the-art convection and lightning parameterisations are used in simulations with the global atmospheric chemistry general circulation model ECHAM5/MESSy, and are evaluated against lightning observations. A wide range in the spatial and temporal variability of the simulated flash densities is found, attributed to both types of parameterisations. Some combinations perform well, whereas others are hardly applicable. In addition to resolution dependent rescaling parameters, each combination of lightning and convection schemes requires individual scaling to reproduce the observed flash frequencies. The resulting NO x profiles are inter-compared, however definite conclusions about the most realistic profiles can currently not be drawn.
Subfields: Atmospheric Science, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/deca61c557435eaa5a9bda345d21c9404ebf9f8b
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Citations in the corpus
- Online coupled regional meteorology chemistry models in Europe: current status and prospects (2013, methodology): “Online coupled models with access to convective mass fluxes or cloud fields calculated by the meteorological model, however, would be perfectly suited to simulate this source (Tost et al., 2007).”
- Optimized regional and interannual variability of lightning in a global chemical transport model constrained by LIS/OTD satellite data (2012, unknown): “Parameterizations used in global chemical transport models (CTMs) show little skill in reproducing observed lightning distributions [ Tost et al. , 2007; Sauvage et al. , 2007b].”
- Global distribution of the effective aerosol hygroscopicity parameter for CCN activation (2010, methodology): “The wet deposition of gases and aerosols (both nucleation and impaction scavenging) is treated within the SCAV submodel (Tost et al., 2006, 2007a), which describes scavenging due to convective and large-scale rain, snow and ice. Dry deposition is treated using the big leaf approach within the…”