Articles | Volume 15, issue 13
https://doi.org/10.5194/acp-15-7269-2015
https://doi.org/10.5194/acp-15-7269-2015
Research article
 | 
03 Jul 2015
Research article |  | 03 Jul 2015

Impact of planetary boundary layer turbulence on model climate and tracer transport

E. L. McGrath-Spangler, A. Molod, L. E. Ott, and S. Pawson

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Subject: Aerosols | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Bacmeister, J. T., Suarez, M. J., and Robertson, F. R.: Rain Reevaporation, Boundary Layer-Convection Interactions, and Pacific Rainfall Patterns in an AGCM, J. Atmos. Sci., 63, 3383–3403, https://doi.org/10.1175/jas3791.1, 2006.
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Balkanski, Y., Schulz, M., Claquin, T., and Guibert, S.: Reevaluation of Mineral aerosol radiative forcings suggests a better agreement with satellite and AERONET data, Atmos. Chem. Phys., 7, 81–95, https://doi.org/10.5194/acp-7-81-2007, 2007.
Ballard, S. P., Golding, B. W., and Smith, R. N. B.: Mesoscale model experimental forecasts of the Haar of northeast Scotland, Mon. Weather Rev., 119, 2107–2123, https://doi.org/10.1175/1520-0493(1991)119<2107:MMEFOT>2.0.CO;2, 1991.
Beljaars, A. C. M. and Betts, A. K.: Validation of the boundary layer representation in the ECMWF model, ECMWF Seminar Proceedings, Reading, UK, 7–11 September 1992, Validation of models over Europe, Vol. II, 159–195, available at: http://old.ecmwf.int/publications/library/ecpublications/_pdf/seminar/1992/validation2_beljaars.pdf (last access: 24 October 2014), 1992.
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Short summary
PBL processes are important for weather, climate, and tracer transport and concentration. In the GEOS-5 AGCM, the PBL depth is used in the calculation of turbulent mixing. This study analyzes the impact of using different PBL depth definitions in this calculation. Near surface wind speed differences modify Saharan dust on the order of 1e-4kg m-2. CO surface concentrations are modified by up to 20 ppb over biomass burning regions. Instantaneous CO2 differences are on the order of 10 ppm.
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