.. _recipes_aerosols: .. include:: ../../common.txt Aerosols ======== This recipe is available via |AutoAssess|. Overview -------- The ‘aerosols’ component assesses the following parameters/ processess: 1. Sulphur-cycle simulation: SO2 and SO4 concentrations against EMEP measurements 2. Aerosol microphysical processes : Aerosol Optical Depth (AOD) values against AERONET measurements 3. Dust assessment: Emissions, Loadings, Deposition, AOD against U. Miami and AERONET measurements The scripts can handle the older “CLASSIC” as well as recent “GLOMAP” aerosol schemes without any modification. Available recipes and diagnostics --------------------------------- The assessment code is available from the `AutoAssess`_ repository. Performance metrics: * S-cycle: Root Mean Square Error (RMSE) of SO2 and SO4 surface concentrations against EMEP and IMPROVE stations for all seasons * AOD : RMSE of Optical Depth at 440 nanometer against AERONET station measurements for all seasons. * Dust: Combined assessment of dust surface concentrations against U. Miami and AOD against AERONET at Global (all seasons) as well as Regional (annual) level. Diagnostics: * Seasonal mean SO2 and SO4 surface concentrations * Seasonal mean Aerosol Optical Depth at 440 nm * Seasonal mean Dust emission, concentration and AOD values User settings in recipe ----------------------- There are no user settings for this recipe Variables --------- ==================================== ============ ============== ============================================== Variable/Field name realm frequency Comment ==================================== ============ ============== ============================================== Sulphur Dioxide Mass mixing ratio Atmosphere seasonal mean STASH item: s00i101 (CLASSIC), s34i072 (GLOMAP) Sulphate Aitken mode mass mix. rat. Atmosphere seasonal mean CLASSIC aerosol scheme only Sulphate Accum. mode mass mix. rat. Atmosphere seasonal mean CLASSIC only Sulphate Dissolved mode mmr Atmosphere seasonal mean CLASSIC only Nucleation mode (soluble) H2SO4 MMR Atmosphere seasonal mean GLOMAP aerosol scheme only Aitken mode (soluble) H2SO4 MMR Atmosphere seasonal mean GLOMAP only Accum. mode (soluble) H2SO4 MMR Atmosphere seasonal mean GLOMAP only Coarse mode (soluble) H2SO4 MMR Atmosphere seasonal mean GLOMAP only Sulphate Optical Depth in Radiation Atmosphere seasonal mean CLASSIC only Mineral Dust Optical Depth in Radn. Atmosphere seasonal mean CLASSIC or GLOMAP+CLASSIC-dust Sea salt Optical Depth in Radn. Atmosphere seasonal mean CLASSIC only Soot Optical Depth in Radn. Atmosphere seasonal mean CLASSIC only Biomass Optical Depth in Radn. Atmosphere seasonal mean CLASSIC only Biogenic Optical Depth in Radn. Atmosphere seasonal mean CLASSIC only Foss Fuel Org. Carb OD in Radn. Atmosphere seasonal mean CLASSIC only Aitken mode (soluble) Optical Depth Atmosphere seasonal mean GLOMAP only Accum. mode (soluble) Optical Depth Atmosphere seasonal mean GLOMAP only Coarse mode (soluble) Optical Depth Atmosphere seasonal mean GLOMAP only Aitken mode (insoluble) Opt. Depth Atmosphere seasonal mean GLOMAP only Dust mass mixing ratio (6 divisions) Atmosphere seasonal mean CLASSIC or GLOMAP+CLASSIC-dust STASH codes: s00-i431 to i436 Dust emission flux (6 divisions) Atmosphere seasonal mean STASH: s03-i401 to i406 Dust dry deposition flux (6 div) Atmosphere seasonal mean STASH: s03-i441 to i446, i451 to i456 Dust wet dep flux ls precip (6 div) Atmosphere seasonal mean STASH: s04-i431 to i436 Dust wet dep flux conv prec (6 div) Atmosphere seasonal mean STASH: s05-i281 to i286 Potential temperature Atmosphere seasonal mean Specific Humidity Atmosphere seasonal mean Pressure on Theta levels Atmosphere seasonal mean Orography Atmos/Land seasonal mean ==================================== ============ ============== ============================================== Observations and reformat scripts --------------------------------- How to obtain and process the data (A) EMEP SO2 and Sulphate data (currently Year 2000) (B) IMPROVE Sulphate data (currently Year 2000) (C) AERONET measurements References ---------- Sulphur cycle: EMEP:(European Monitoring and Evaluation Programme) K. Tørseth, W. Aas, K. Breivik, A. M. Fjæraa, M. Fiebig, A. G. Hjellbrekke, C. Lund Myhre, S. Solberg, and K. E. Yttri; Introduction to the European Monitoring and Evaluation Programme (EMEP) and observed atmospheric composition change during 1972–2009; Atmos. Chem. Phys., 12, 5447–5481, 2012. http://www.atmos-chem-phys.net/12/5447/2012/, doi:10.5194/acp-12-5447-2012 IMPROVE:(Interagency Monitoring of PROtected Visual Environments) Malm, W. C., J. F. Sisler, D. Huffman, R. A. Eldred, and T. A. Cahill; Spatial and seasonal trends in particle concentration and optical extinction in the United States, J. Geophys. Res., 99, 1347-1370,(1994) (Suggested Acknowledgement: IMPROVE is a collaborative association of state, tribal, and federal agencies, and international partners. US Environmental Protection Agency is the primary funding source, with contracting and research support from the National Park Service. The Air Quality Group at the University of California, Davis is the central analytical laboratory, with ion analysis provided by Research Triangle Institute, and carbon analysis provided by Desert Research Institute.) AERONET: (AErosol RObotic NETwork) Holben B.N., T.F.Eck, I.Slutsker, D.Tanre, J.P.Buis, A.Setzer, E.Vermote, J.A.Reagan, Y.Kaufman, T.Nakajima, F.Lavenu, I.Jankowiak, and A.Smirnov, 1998: AERONET - A federated instrument network and data archive for aerosol characterization, Rem. Sens. Environ., 66, 1-16. Example plots ------------- .. figure:: aerosols_overview.png :align: center :scale: 50 % :alt: NAC plot for Aerosols area Summary overview of metrics from the Aerosols assessment .. figure:: aod440_Total_v_aeronet.png :align: center :scale: 25 % :alt: aod440_Total_v_aeronet.png Global surface plot comparing Total Aerosol Optical Depth at 0.44 microns vs AERONET stations .. figure:: aod440_Dust_v_aeronet.png :align: center :scale: 25 % :alt: aod440_Dust_v_aeronet.png Global surface plot comparing Dust Aerosol Optical Depth at 0.44 microns vs AERONET stations .. figure:: aod440_NonDust_v_aeronet.png :align: center :scale: 25 % :alt: aod440_NonDust_v_aeronet.png Global surface plot comparing Non-dust Aerosol Optical Depth at 0.44 microns vs AERONET stations .. figure:: dust_scatter.png :align: center :scale: 100 % :alt: dust_scatter.png Scatter plots of Model vs Obs for Dust concentration and AODs on Global and Regional scales over all seasons