Description of upgrade
The CAMS IFS cycle 47R1 is based on ECMWF's IFS cycle 47R1 . This is an upgrade with many scientific contributions, including changes in the use of observations and in modelling.
The page will be updated as required. It was last changed on 20th April 2020.
For a record of changes made to this page please refer to Document versions .
Further information and advice regarding the upgrade can be obtained from the Copernicus User Support.
Timetable for implementation
The planned timetable for the implementation of the cycle 46r1 is as follows:
| Date | Event |
|---|---|
| TBC | Announcement of expected implementation date |
| TBC | Implementation |
The timetable represents current expectations and may change in light of actual progress made.
Current Status
IFS cycle 47r1 is going through its final testing phase.
Meteorological content of the new cycle
The meteorological changes can be found on the ECMWF IFS CY47R1 page .
Atmospheric composition content of the new cycle
Assimilation
- No changes compared to 46R1
Observations
- Activation of TROPOMI volcanic SO2 data. No other changes compared to the observations used in 46R1.
Emissions
- Updated emissions inventories: CAMS_GLOB_ANT v4.2 (anthropogenic) and
CAMS_GLOB_VOLC(JF the Carn data set is not from CAMS 81)(volcanic outgassing, based on Carn et al., 2017). - Updated to GFASv1.4 biomass-burning emissions.
- Excluded agricultural waste burning from CAMS_GLOB_ANT, avoiding double-counting with GFAS.
- Improved diurnal cycle (CO, NO, SO2, NH3) and vertical profile for anthropogenic emissions (SO2, all over sea).
Other model changes
- Vertical resolution increased from 60 levels to 137 levels, matching that used at ECMWF for NWP. This includes moving the model top from 0.1 hPa to 0.01 hPa. (JF: That was the previous update)
- Hybrid Linear Ozone (HLO) scheme (a Cariolle-type linear parameterisation of stratospheric ozone chemistry using the multi-year mean of the CAMS reanalysis as mean state) .
- New sea-salt emission scheme based on Albert et al. (2016), providing better agreement with measured sea-salt size distribution.
- Updated dust source function, reducing excess dust in the Sahara, Middle East and other regions, and restoring missing dust over Australia.
- Revised coefficients in UV processor, based on ATLAS3 spectrum.
Impact of the new cycle
To be completed.
Technical details of the new cycle
New and discontinued parameters
There are no new or discontinued parameters in the disseminated data compared to 46r1.
Software
Availability of test data from the cycle 47r1 test suites
To be completed
Document versions
| Date | Reason for update |
|---|---|
| 20 April 2019 | Initial version |