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CAMS-regional-air-quality.md

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Regional air quality forecasts at major European cities

This sample dataset contains extracted hourly forecasts up to three days ahead of the main pollutants:

  • ozone (O3)
  • nitrogen dioxide (NO2)
  • sulphur dioxide (SO2)
  • carbon dioxide (CO)
  • particulate matter > 10 µm (PM10)
  • particulate matter > 2.5 µm (PM25)
  • air quality index (AQI)

at almost 3000 locations all over Europe.

All values are in µg/m3 except AQI which is dimensionless index in the range between 1 and 5 indicating the level of air quality (1 - best, 5 - worst)

The details about locations can be found in this file.

Data location and file naming convention

Sample data covering period from Nov 2017 to May 2018 is available on the public FTP server:

ftp://ftp.ecmwf.int/pub/macc/atmoshack

Files are named as

CAMS_WEB_FORECAST_${YYYYMMDD}_D+${DPLUS}.csv.gz

where

YYYYMMDD - date on which a forecast was generated DPLUS - forecast range in days; (T0 = YYYY-MM-DD 00UTC)

D+0 files contain forecast steps T0+0h..T0+24h D+1 files contain forecast steps T0+25h..T0+48h D+2 files contain forecast steps T0+49h..T0+72h D+3 files contain forecast steps T0+73..T0+96h

For example, file CAMS_WEB_FORECAST_20180101_D+1.csv.gz with contain forecasts valid from 2018-01-02 01:00 to 2018-01-03 00:00.

Data format

  • Data is encoded in gzipped CSV files
  • Files contain air quality forecasts for ~3000 of major European cities
  • Times are expressed in UTC
ID,Date,Time,AQI,O3,NO2,SO2,CO,PM10,PM25
ALXX0001,2018-05-10,00:00,1,65.79,2.01,1.10,152.63,9.23,8.69
ALXX0001,2018-05-10,01:00,1,67.77,1.89,1.01,151.53,9.63,9.04
ALXX0001,2018-05-10,02:00,1,66.07,1.81,0.90,150.62,9.94,9.30

Sample data extraction

See this Jupyter notebook: https://github.com/OpenDataHack2018/Available-Open-Data/blob/master/Reading_CAMS_regional_data.ipynb