Page History

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The CAMS IFS cycle 48R1 is based on ECMWF's  IFS cycle 48R1 . This is a major upgrade with various scientific contributions. Key elements are the addition of full stratospheric chemistry, changes to the modelling of dust aerosol resulting in a significant increase in global dust burden, and the addition of two new aerosol species (anthropogenic and biogenic secondary aerosol). In terms of technical changes, there is an important change to the GRIB encoding. More information can be found below.

The page will be updated as required. It was last changed on 16 February 29 March 2023.

For a record of changes made to this page please refer to Document versions .

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The timetable represents current expectations and may change in light of actual progress made

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• CAMS_GLOB_ANT v5.3 with sectoral diurnal cycles and injection heights
• CAMS_GLOB_BIO v3.1 climatology
• CAMS_GLOB_OCE v.3.1 climatology DMS
• CAMS_GLOB_AIR v3.1 CO2/NOx  (aircraft)
• Using IS4FIRES injection heights (from GFAS version 1.4)
• Sector-specific emission input to the IFS and application of sector specific injection height ranges and diurnal cycle profiles 
• Natural emissions as as used previously 

Model changes

• Activation of stratosphere chemistry using the BASCOE scheme - adding 63 reactive gas species 
• New tropospheric species: HCN, CH3CN, Glyoxal and Glycoladehyde
• Improved isoprene oxidation simulation
• Update of dry deposition formulation for reactive gases 
• Two new secondary organic aerosol tracers (anthropogenic and biogenic) and respective precursor gas tracers 
• Major update of dust emissions and removal simulation (increase in the global dust burden by factor 2)   
• Review of aerosol optical properties (dust , brown carbon) 
• Improved secondary inoraganic aerosol simulation 
• Use of COMADH advection for aerosols, reactive gases and GHG

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  grib_ls -n statistics ccsds.grib grid_simple.grib

Software

TBC

Availability of test data from the cycle

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48r1 test suites

The CAMS operational FTP server (ECPDS) will serve the most recent 3 days of test data, once the e-suite is running in near-real-time, in the directories "/DATA/CAMS_GLOBAL_TEST" and "/DATA/CAMS_EUROPE_BC_TEST" for global and regional boundary condition data, respectively. In addition, surface level fields (model level 137) will be provided as individual files in the CAMS_GLOBAL_ADDITIONAL_TEST directory and (plume model updated) GFAS hourly test data will be provided in the CAMS_GFAS_HOURLY_TEST directory . Users wanting to access the output from the current test system for a longer period can access the data from 1 September 2022 onwards directly on MARS or through our WebAPI. More details can be found here: Accessing CAMS 48r1 test data (draft).

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