2. TOAR Data Sources

Table 2.1 summarise sources of the data in the TOAR database. Note that it describes the data sources which provided surface ozone data to the first phase of the Tropospheric Ozone Assessment Report. While most of these data are re-used in TOAR-II, there may be some changes because of data licensing issues (TOAR-II declared to make all data available under a CC-BY 4 license, but not all data providers have granted permission to do so), or because the responsible agency for providing the data has changed. We hope and expect that several new sources of data can be added to this compilation over the next 1-2 years. A major new data collection effort for TOAR-II will occur during the year 2022, and this document shall be updated accordingly after completion 1.

Table 2.1 Summary of data sources in the TOAR database. This table only contains datasets encompassing about 10 stations. The TOAR database contains about 136 additional data sets which do not originate from one of the data providers listed below.

Data source	No. of stations	Variables	Type of Submission	Upload frequency
Global
GAW World Data Centre for Greenhouse Gases (WDCGG) 2 ; GAW World Data Centre for Reactive Gases (WDCRG) 3	218	benzene ch4 co ethane humidity irradiance ozone press propane relhum rn temp toluene totprecip	download individual files	manual update planned for 2022
Africa
South African Network	24	ozone	submitted individual files	no updates
North America
Government of Canada’s CaPMon -Air quality monitoring networks and data 4	19	ozone	download	no update loaded
U.S. Environmental Protection Agency (EPA), Clean Air Status and Trends Network (CASTNET) 5	117	ozone	download	unregularly, on request
U.S. Environmental Protection Agency (EPA), Air Quality Data (AQS) 6	2963	u v humidity irradiance press totprecip temp ozone	download of database dumps	manual update, last time in Q2/2022
Environment and Climate Change Canada, National Air Pollution Surveillance (NAPS) program 7	373	ozone	download of database dumps	manual update next planned for 2022
South America
Colombia air quality network	16	co irradiance no no2 ozone pm10 press relhum temp totprecip wdir wspeed	submitted	irregularly
Asia
Acid Deposition Network in Monitoring East Asia (EANET) 8	16	humidity irradiance ozone press temp totprecip u v	download individual files	manual update, next planned for 2022
Israeli air quality network (ISRAQN)	12	ozone	submitted individual files	no updates
South Korean National Institute Of Environmental Research (NIER) 9	316	ozone	submitted individual files	no updates
National Institute for Environmental Studies Japan(NIES) 10	1391	ozone ox	download individual files	manual update next planned for 2022
OpenAQ 11	12078	co no2 ozone so2 bc	download	daily
Teheran air quality network 12	20	ozone	submitted individual files	no updates
Australia
Australian air quality network	56	ozone	contributed in batches via email	no updates
Europe
European Environment Agency’s Airbase 13	6459	co humidity irradiance no no2 nox ozone press temp totprecip u v	download of dabase dumps	manual update next planned for 2022
European Monitoring and Evaluation Programme (EMEP) 14	196	irradiance ozone press relhum temp wdir wspeed	web harvesting	manual update next planned for 2022
German Environment Agency’s Air Data (UBA) 15	1004	benzene co no no2 ozone pm10 pm2p5 press relhum so2 temp toluene wdir wspeed	receipt of database dumps (validated data) and automated NRT harvesting	annual update (next 2022/Q3) of validated data
Institute of Geosciences Dept. Meteorology, University of Bonn, Germany (MIUB) (covers all European stations as of 2016)	number of time series: 63369	cloudcover pblheight humidity press relhum temp totprecip u v	submitted csv data files; special processing not further described here	no updates

Footnotes

1

More detailed documentation on the processing of data from specific sources is available to administrators on an internal Wiki page (https://gitlab.jsc.fz-juelich.de/esde/toar-data/toar-db-data/-/wikis/home#toar-database-new-version; internal use only).

2

https://gaw.kishou.go.jp/

3

https://www.gaw-wdcrg.org/

4

https://www.canada.ca/en/environment-climate-change/services/air-pollution/monitoring-networks-data/canadian-air-precipitation.html

5

https://java.epa.gov/castnet/reportPage.do

6

https://www.epa.gov/outdoor-air-quality-data

7

https://www.canada.ca/en/environment-climate-change/services/air-pollution/monitoring-networks-data/national-air-pollution-program.html

8

https://www.eanet.asia/

9

https://www.nier.go.kr/eng/

10

https://www.nies.go.jp/igreen/

11

https://openaq.org/

12

http://airnow.tehran.ir/home/DataArchive.aspx

13

https://www.eea.europa.eu/data-and-maps/data/aqereporting-2

14

http://ebas.nilu.no/DataSets.aspx

15

https://www.umweltbundesamt.de/en/data/air/air-data