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
- Newer, reprocessed satellite retrievals assimilated
- Ozone and aerosols are used interactively in radiation scheme. Previously, climatologies were used
- Includes GHG in addtion to aersols and chemistry fields
CAMS reanalysis strengths compared to the CAMS interim reanalysis
- Newer model cycle (CY42R1)
Higher temporal 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. Previously, climatologies were used.
- Includes GHG in addtion to aersols and chemistry fields
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 - present | 2003 - present |
| 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 40r2/41r1 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 (2003–2015) | |
| 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 (see Flemming et al. 2017) & Cariolle ozone parametrisation in stratosphere | IFS CB05 (Flemming et al. 2017, with updates as given in CAMS Reanalysis data documentation) & Cariolle ozone parametrisation in stratosphere |
| Input meteorological observations | OPS (stream=DA) | OPS (stream=DCDA) | As in ERA5 (2003-2016)? OBS for later years?? |
| Input atmospheric composition observations | See Inness et al 2013 and CAMS: MACC Reanalysis of global atmospheric composition (2003 - 2012) | See CAMS reanalysis data documentation | |
| New parameters | |||
| Parameters removed | |||
| Handling of accumulated parameters | Accumulated from the beginning of the forecast | Accumulated from previous post-processing | |
| Product main page | |||
| Technical documentation | Inness et al 2013: The MACC reanalysis: an 8 yr data set of atmospheric composition CAMS: MACC Reanalysis of global atmospheric composition (2003 - 2012) | ERA5 data documentationCAMS reanalysis data documentation | |
| Additional innovations |
