2026-05-09T17:01:31Z https://api.figshare.com/v2/oai
oai:figshare.com:article/21610533 2022-11-28T13:53:36Z category_25750 category_26998 category_25732 portal_549 item_type_3 month_year_11_2022
10.5522/04/21610533.v2 https://figshare.com/articles/dataset/MAX-DOAS_retrievals_of_formaldehyde_HCHO_and_nitrogen_dioxide_NO2_vertical_profiles_over_Central_London/21610533 https://ndownloader.figshare.com/files/38312655 https://ndownloader.figshare.com/files/38317563 https://ndownloader.figshare.com/files/38317569 https://ndownloader.figshare.com/files/38317704 https://ndownloader.figshare.com/files/40219756 10.5522/04/21610533 Marais, Eloise Eloise Marais 0000-0001-5477-8051 Ryan, Robert Robert Ryan Tirpitz, Jan-Lukas Jan-Lukas Tirpitz Frieß, Udo Udo Frieß 0000-0001-7176-7936 Gershenson-Smith, Eleanor Eleanor Gershenson-Smith <![CDATA[MAX-DOAS retrievals of formaldehyde (HCHO) and nitrogen dioxide (NO2) vertical profiles over Central London]]> Atmospheric sciences not elsewhere classified Other environmental sciences not elsewhere classified Atmospheric composition, chemistry and processes Air quality England UK ozone isoprene University College London UCL Torrington O2-O2 O4 Atmospheric Sciences Atmospheric Sciences not elsewhere classified Environmental Science Environmental Chemistry (incl. Atmospheric Chemistry) 2023-04-20 2023-05-30 Dataset 2022 University College London Compressed zipped files of MAX-DOAS measurements at the Central London University College London monitoring site from 1 July to 30 September 2022. 

Includes three compressed files of daily MAX-DOAS observations of HCHO, NO2, and O4 in NetCDF format. Each compressed file is the collection of measurements for the three optimized azimuth angles. 

Data variables in each NetCDF file are:

  • NO2 vertical profiles and error estimate in ppbv
  • HCHO vertical profiles and error estimate in ppbv
  • Aerosol extinction and error estimate at 360 nm in (1/km)
  • Qualitative cloud flag

Variables dimensions and units are specified in each file. 

Additional details of retrieval of trace gas profiles and cloud detection are in Ryan et al. (2022), submitted for review to Copernicus' Atmospheric Chemistry and Physics journal Measurement Report stream.


NetCDF file of hourly isoprene concentrations at the London Marylebone Road monitoring site from 1 July to 30 September 2022. The file includes isoprene concentrations in ug/m3 and ppbv directly measured and derived using the strong linear relationship bewteen hourly isoprene at Marylebone Road and the London Eltham site. 


UCL MAX-DOAS photo credit: Robert G Ryan.


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