CAMS reanalysis strengths compared to the MACC reanalysis
- Newer model cycle (CY42R1)
Higher temporal resolution
Longer 48-forecasts from 0 UTC
- Chemistry routines included in IFS
- More chemical analysis fields available
- All chemistry archived in MARS
- Newer, reprocessed satellite retrievals assimilated
- Ozone and aerosols are used interactively in radiation scheme.
CAMS reanalysis strengths compared to the CAMS interim reanalysis
- Newer model cycle (CY42R1)
Higher temporal and spatial resolution
Longer 48-forecasts from 0 UTC
- More chemical analysis fields available
- Newer, reprocessed satellite retrievals assimilated
- Ozone and aerosols are used interactively in radiation scheme.
Comparison table
This table highlights major differences between the CAMS reanalysis, the MACC reanalysis and the CAMS interim reanalysis . There are many additional differences, in particular changes to the computation of individual atmospheric parameters (due to the change in the assimilation system from 36r1 and 40r2 to 41r2), differences due to changes in the assimilated atmospheric composition datasets that are not listed here.
| MACC reanalysis | CAMS interim reanalysis | CAMS reanalysis | |
|---|---|---|---|
| Exp ID | exp=rean, class=mc | exp=eac3, class=mc | exp=eac4, class=mc |
| Period covered | 2003 - 2012 | 2003 - 2018 | 2003 - present (though only 2003 - Dec 2022) |
| Production Period | March 2010 – Feb 2012 | Dec 2014-Dec 2016, then continued in NRT | Jan 2017 – Dec 2018, then continued in near real-time |
| Assimilation system | IFS Cycle 36r1 4D-Var | IFS Cycle 40r2 (2003-2015) 4D-Var IFS Cycle 41r1 (2016 - ... ) 4D-Var | IFS Cycle 42r1 4D-Var |
| Spatial resolution | 80 km globally (T255), 60 levels to 0.1 hPa | 110 km globally (T159), 60 levels to 0.1 hPa | 80 km globally (T255), 60 levels to 0.1 hPa |
| Output frequency (temporal resolution) | 6-hourly analysis fields 3-hourly forecast fields from 0 UTC up to 24 hours | 6-hourly analysis fields 3-hourly forecast fields from 6 and 18 UTC up to 12 hours | 3-hourly analysis fields 3-hourly forecast fields from 0 UTC up to 48 hours 1-hourly surface forecast fields from 0 UTZ up to 48 hours |
| Anthropogenic missions | Chemistry species: MACCity (trend: ACCMIP + RCP8.5), Aerosols: AEROCOM | MACCity (trend: ACCMIP + RCP8.5) & CO emission upgrade Stein et al. (2014) for chemistry and aerosols | MACCity (trend: ACCMIP + RCP8.5) & CO emission upgrade Stein et al. (2014) |
| Biomass burning emissions | GFED (2003–2008) and GFAS v0 (2009–2012 ) | GFAS v 1.2 | GFAS v 1.2 |
| Biogenic emissions | Monthly mean VOC emissions for the year 2003 calculated by the MEGAN2.1 model (Guenther et al., 2006) used for the whole period. No interannual variability. | Monthly mean VOC emissions calculated by the MEGAN2.1 model (Guenther et al., 2006) using MERRA reanalysed meteorology (Sindelarova et al., 2014) for the period 2003-2010. For the remaining years 2011–2017 aclimatology data set of the MEGAN-MACC data was put together. | Monthly mean VOC emissions calculated by the MEGAN model using MERRA reanalysed meteorology (Sindelarova et al., 2014) for the whole period. |
| Chemistry modules | CTM MOZART3 coupled to the IFS (see Flemming et al. 2009) | IFS CB05 (Flemming et al. 2015) & Cariolle ozone parametrisation in stratosphere | IFS CB05 (Flemming et al. 2015, with updates as given in CAMS: Reanalysis data documentation) & Cariolle ozone parametrisation in stratosphere |
| Aerosol modules | Mocrette et al. (2009) | Mocrette et al. (2009) plus changes described in Flemming et al. (2017) | See CAMS: Reanalysis data documentation |
| Input meteorological observations | OPS (stream=DA) | OPS (stream=DCDA) | As in ERA5 (2003-2016?) OPS for later years |
| Input atmospheric composition observations | See Inness et al 2013 and MACC: Reanalysis of global atmospheric composition (2003 - 2012) | See Flemming et al. 2017 | See CAMS reanalysis data documentation |
| Aerosol used in radiation scheme | Tegen climatology | Tegen climatology | Interactive active aerosols, i.e. aerosol fields from eac4 used in radiation scheme |
| Ozone used in radiation scheme | GEMS climatology | GEMS climatology (2003-2015) MACC climatology (2016 - ...) | Interactive ozone, i.e. ozone field from eac4 used in radiation scheme |
| Parameters | Aerosol fields and CO, HCHO, NO2, O3, SO2 available from MARS, additional chemistry fields from MOZART CTM available as netcdf fields on request | Aerosol fields and a limited number of chemistry fields available from MARS. | Full chemistry output archived as type=an every 3 hours (see parameter lists on CAMS: Reanalysis data documentation) |
| Stratospheric chemistry | Yes | No, but Cariolle ozone parametrisation in stratosphere and stratospheric O3 available. | No, but Cariolle ozone parametrisation in stratosphere and stratospheric O3 available. |
| Product main page | contact Copernicus Helpdesk | CAMS: Reanalysis data documentation | |
| Technical documentation | Inness et al 2013: The MACC reanalysis: an 8 yr data set of atmospheric composition MACC: Reanalysis of global atmospheric composition (2003 - 2012) | Flemming et al. 2017: The CAMS interim Reanalysis of Carbon Monoxide, Ozone and Aerosol for 2003–2015 | CAMS: Reanalysis data documentation |
