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Introduction
The aerosol climatology was derived from the CAMS interim Reanalysis and its control run (Flemming et al. 2017) as described in Bozzo et al. (2019). The data set is based on the modelled aerosol mixing ratios of the control run, which were scaled to match the Aerosol Optical Depth (AOD) analyses of the CAMS interim Reanalysis (Data assimilation of MODIS AOD). It contains monthly mean 3D mass mixing ratios of desert dust (3 size bins), seas salt (3 size bins), organic matter, black carbon and sulphate as represented by the IFS-AER aerosol scheme (Remy et al. 2019) .
Data description
The purpose of the dataset is to represent aerosols in the radiation scheme of the Integrated Forecasting System of ECMWF.
The file aerosol_cams_3d_climatology_2003-2013.nc contains the CAMS aerosol climatology as originally described in Bozzo et al. (2019)
The file aerosol_cams_3d_climatology_47r1.nc contains the CAMS aerosol climatology as used in IFS cycle 47r1. The dataset has manually reduced organic matter and black carbon mass mixing ratios over Central Africa. The original dataset had led to a degradation of the temperature forecasts in that area.
The file aerosol_cams_ifs_optics.nc provides the optical parameters needed for the implementation of the radiative effect of the CAMS aerosol species in the ECMWF radiation scheme. The file also provides the optical properties for a set of 20 individual wavelengths covering the visible and near-infrared spectral range.
All files can be found here: https://sites.ecmwf.int/data/cams/aerosol_radiation_climatology/
Dataset DOI: https://doi.org/10.24380/jgs8-sc58
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| title | Table 1: CAMS aerosol climatology parameters. |
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| Parameters | Units |
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| Black Carbon hydrophilic | kg m-2 | | Black Carbon hydrophobic | kg m-2 | | Half level delta pressure | Pa | | Air pressure | Pa | | Mineral dust bin 11 layer-integrated mass | kg m-2 | | Mineral dust bin 2 2 layer-integrated mass | kg m-2 | | Mineral dust bin 33 layer-integrated mass | kg m-2 | | Hydrophilic mineral dust layer-integrated mass | kg m-2 | | Hydrophobic mineral dust layer-integrated mass | kg m-2 | | Sea salt bin 1 layer-integrated mass | kg m-2 | | Sea salt bin 2 layer-integrated mass | kg m-2 | | Sea salt bin 3 layer-integrated mass | kg m-2 | | Sulfates layer-integrated mass | kg m-2 |
1This bin contains particles with dry radius in the range 0.03-0.5 microns. 2This bin contains particles with dry radius in the range 0.5-5.0 microns. 3This bin contains particles with dry radius in the range 5.0-20.0 microns. |
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| title | Table 2: CAMS aerosol optical parameters. |
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| Parameters | Units |
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| Longwave asymmetry factor of hydrophilic aerosols | 0-1 | | Longwave asymmetry factor of hydrophobic aerosols | 0-1 | | Asymmetry factor of hydrophilic aerosols at selected wavelengths | 0-1 | | Asymmetry factor of hydrophobic aerosols at selected wavelengths | 0-1 | | Shortwave asymmetry factor of hydrophilic aerosols | 0-1 | | Shortwave asymmetry factor of hydrophobic aerosols | 0-1 | | Lidar ratio of hydrophilic aerosols at selected wavelengths | sr | | Lidar ratio of hydrophobic aerosols at selected wavelengths | sr | | Longwave mass-extinction coefficient of hydrophilic aerosols | m2 kg-1 | | Longwave mass-extinction coefficient of hydrophobic aerosols | m2 kg-1 | | mass-extinction coefficient of hydrophilic aerosols at selected wavelengths | m2 kg-1 | | mass-extinction coefficient of hydrophobic aerosols at selected wavelengths | m2 kg-1 | | Shortwave mass-extinction coefficient of hydrophilic aerosols | m2 kg-1 | | Shortwave mass-extinction coefficient of hydrophobic aerosols | m2 kg-1 | | Lower bounds of relative humidity bins | % | | Upper bounds of relative humidity bins | % | | Longwave single scattering albedo of hydrophilic aerosols | 0-1 | | Longwave single scattering albedo of hydrophobic aerosols | 0-1 | | single scattering albedo of hydrophilic aerosols at selected wavelengths | 0-1 | | single scattering albedo of hydrophobic aerosols at selected wavelengths | 0-1 | | Shortwave single scattering albedo of hydrophilic aerosols | 0-1 | | Shortwave single scattering albedo of hydrophobic aerosols | 0-1 | | Copy of CAMSiRA: the CAMS interim ReanalysisWavelength of monochromatic data | m | | Lower bound wavenumber for longwave band | cm-1 | | Lower bound wavenumber for shortwave band | cm-1 | | Upper bound wavenumber for longwave band | cm-1 | | Upper bound wavenumber for shortwave band | cm-1 |
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References
Bozzo, A., Benedetti, A., Flemming, J., Kipling, Z., and Rémy, S.: An aerosol climatology for global models based on the tropospheric aerosol scheme in the Integrated Forecasting System of ECMWF, Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2019-149, in review, 2019.
Flemming, J., Benedetti, A., Inness, A., Engelen, R. J., Jones, L., Huijnen, V., Remy, S., Parrington, M., Suttie, M., Bozzo, A., Peuch, V.-H., Akritidis, D., and Katragkou, E.: The CAMS interim Reanalysis of Carbon Monoxide, Ozone and Aerosol for 2003-2015, Atmos. Chem. Phys., 17, 1945-1983, doi:10.5194/acp-17-1945-2017, 2017.
Rémy, S., Kipling, Z., Flemming, J., Boucher, O., Nabat, P., Michou, M., Bozzo, A., Ades, M., Huijnen, V., Benedetti, A., Engelen, R., Peuch, V.-H., and Morcrette, J.-J.: Description and evaluation of the tropospheric aerosol scheme in the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS-AER, cycle 45R1), Geosci. Model Dev., 12, 4627–4659, https://doi.org/10.5194/gmd-12-4627-2019, 2019.
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