Monitoring atmospheric composition & climate
 
 
Data Access through FTP


Model description

The description of the current global model can be found here: link.

Data access

If you are interested in getting access to this dataset please read and accept the MACC data licence and then contact us.

Currently only a subset of atmospheric composition variables (see the List of parameters tables below) is available through FTP. Please contact us if you require additional species.

Lisf of changes

File naming convention

We've adopted a file naming convention based on WMO guidelines as follows:

z_macc_c_ecmf_yyyymmddhhmmss_vvvv_tt_lt_sss_param.[grib|nc]

Where:

ecmf  is the WMO location indicators. The list can be found here.
yyyymmddhhmmss  is the base date and time of the forecast.
vvvv  is a version or experiment identifier. prod will be used for operational products, test (or experiment ID) will be used for testing purposes, rean for reanalysis if needed.
tt  type of data, from fc, an, ...
lt  is the type of level. pl for pressure level products, sfc for surface fields, ml for model level fields
sss  is the forecast hour time step. For accumulation and averages, it is the end time. This number must be zero padded to 3 digits, e.g. step 24 is given as 024
param

 is the parameter short name as defined here

grib, nc

 is the format of a file, GRIB or NETCDF

Data organisation

The dataset is grouped by type of product (analysis or forecast), level type (surface parameter, pressure level or model level), by step or forecast range and by parameter. 

Examples

  1. z_macc_c_ecmf_20131029000000_prod_an_sfc_000_tchcho.grib contains analysis field of total column formaldehyde computed on 29th October 2013 at 00:00 UTC.
  1. z_macc_c_ecmf_20131029000000_prod_fc_pl_012_co.grib contains all the pressure levels of +12 step CO fields from a forecast started on 29th October 2013 at 00:00 UTC.
  1. z_macc_c_ecmf_20131029000000_prod_fc_ml_012_go3.nc would contain all the model levels of step 12 O3 fields from a forecast which was started on 29th October 2013 at 00:00 UTC in NETCDF format.

Data availability

The latest forecasts are normally available at 22:00 UTC. After the data transfer to the ftp server is completed a manifest file is uploaded:

z_macc_c_ecmf_yyyymmddhhmmss_vvvv.manifest

This is a text file which contains the list of all the files and is uploaded only when all the data is available.

List of available parameters

Analysis surface parameters

short namename
z Orography
lsm Land-sea mask
tcno2 Total column Nitrogen dioxide
tcso2 Total column Sulphur dioxide
tcco Total column Carbon monoxide
tchcho Total column Formaldehyde
gtco3 GEMS Total column ozone
tc_ch4 Total column methane
tc_hno3 Total column nitric acid
tc_pan Total column peroxyacetyl nitrate
tc_c5h8 Total column isoprene
tc_no Total column nitrogen monoxide
tc_oh Total column hydroxyl radical
tc_c2h6 Total column ethane
tc_c3h8 Total column propane

Analysis pressure level parameters

short namename
aermr01 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03 Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06 Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07 Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr08 Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr09 Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr10 Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr11 Sulphate Aerosol Mixing Ratio
no2 Nitrogen dioxide
so2 Sulphur dioxide
co Carbon monoxide
hcho Formaldehyde
go3 GEMS Ozone
ch4 Methane
hno3 Nitric acid
pan Peroxyacetyl nitrate
c5h8 Isoprene
no Nitrogen monoxide
oh Hydroxyl radical
c2h6 Ethane
c3h8 Propane

Analysis model level parameters

short namename
aermr01 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03 Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06 Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07 Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr08 Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr09 Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr10 Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr11 Sulphate Aerosol Mixing Ratio
no2 Nitrogen dioxide
so2 Sulphur dioxide
co Carbon monoxide
hcho Formaldehyde
go3 GEMS Ozone
ch4 Methane
hno3 Nitric acid
pan Peroxyacetyl nitrate
c5h8 Isoprene
no Nitrogen monoxide
oh Hydroxyl radical
c2h6 Ethane
c3h8 Propane

Forecast surface parameters

short namename
pm1 Particulate matter d < 1 um
pm2p5 Particulate matter d < 2.5 um
pm10 Particulate matter d < 10 um
tcno2 Total column Nitrogen dioxide
tcso2 Total column Sulphur dioxide
tcco Total column Carbon monoxide
tchcho Total column Formaldehyde
gtco3 GEMS Total column ozone
aod550 Total Aerosol Optical Depth at 550nm
ssaod550 Sea Salt Aerosol Optical Depth at 550nm
duaod550 Dust Aerosol Optical Depth at 550nm
omaod550 Organic Matter Aerosol Optical Depth at 550nm
bcaod550 Black Carbon Aerosol Optical Depth at 550nm
suaod550 Sulphate Aerosol Optical Depth at 550nm
aod469 Total Aerosol Optical Depth at 469nm
aod670 Total Aerosol Optical Depth at 670nm
aod865 Total Aerosol Optical Depth at 865nm
aod1240 Total Aerosol Optical Depth at 1240nm
tc_ch4 Total column methane
tc_hno3 Total column nitric acid
tc_pan Total column peroxyacetyl nitrate
tc_c5h8 Total column isoprene
tc_no Total column nitrogen monoxide
tc_oh Total column hydroxyl radical
tc_c2h6 Total column ethane
tc_c3h8 Total column propane

Forecast pressure level parameters

short namename
aermr01 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03 Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06 Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07 Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr08 Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr09 Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr10 Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr11 Sulphate Aerosol Mixing Ratio
no2 Nitrogen dioxide
so2 Sulphur dioxide
co Carbon monoxide
hcho Formaldehyde
go3 GEMS Ozone
ch4 Methane
hno3 Nitric acid
pan Peroxyacetyl nitrate
c5h8 Isoprene
no Nitrogen monoxide
oh Hydroxyl radical
c2h6 Ethane
c3h8 Propane

Forecast model level parameters

aermr01 Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio
aermr02 Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio
aermr03 Sea Salt Aerosol (5 - 20 um) Mixing Ratio
aermr04 Dust Aerosol (0.03 - 0.55 um) Mixing Ratio
aermr05 Dust Aerosol (0.55 - 0.9 um) Mixing Ratio
aermr06 Dust Aerosol (0.9 - 20 um) Mixing Ratio
aermr07 Hydrophobic Organic Matter Aerosol Mixing Ratio
aermr08 Hydrophilic Organic Matter Aerosol Mixing Ratio
aermr09 Hydrophobic Black Carbon Aerosol Mixing Ratio
aermr10 Hydrophilic Black Carbon Aerosol Mixing Ratio
aermr11 Sulphate Aerosol Mixing Ratio
no2 Nitrogen dioxide
so2 Sulphur dioxide
co Carbon monoxide
hcho Formaldehyde
go3 GEMS Ozone
ch4 Methane
hno3 Nitric acid
pan Peroxyacetyl nitrate
c5h8 Isoprene
no Nitrogen monoxide
oh Hydroxyl radical
c2h6 Ethane
c3h8 Propane

 

Daily data volumes

The daily data volume numbers below are based on the current MACC NRT experiment (link).

 
file size
No. of fields
per file
No. of variables
No. of files (GRIB or NC)
Total size (GRIB)
Total size (NC)
an_sfc 0.3 MB
1 15 15 4.3 MB 3 MB

an_pl

7.3 MB 25 16 24 175 MB 117 MB
an_ml 18 MB 60 16 25 421 MB 280 MB
fc_sfc 0.3 MB 1 26 1066 313 MB 213 MB
fc_pl 7.3 MB 25 24 984 7.0 GB 4.7 GB
fc_ml 18 MB 60 25 1025 17 GB 12 GB
    Total   3139 25 GB 17 GB