Measurements of boundary layer concentration of ozone are made with insitu instruments that samples air continuously at Arrival Heights, Antarctica and is part of the NOAA Global Monitoring Surface Ozone Network.

Original measurements at Arrival Heights were made with a Dasibi Environmental Corp in situ analyser. This was replaced with a TEI-49c in situ analyser. The TEI-49c is owned by NOAA and operated by NIWA at Arrival Heights until October 2023. In October 2023 operation of the TEI was transferred to the USAP Arrival Heights laboratory along with operational responsibility (between NOAA and USAP).

This data set contains continuous UV photometric data of surface level ozone collected at 6m above ground level. Data records consist of UTC time, date, and processed ozone mixing ratio (parts per billion). Data is collected from global locations and is provided in 1 minute and 1 hour averages. Data are archived at the NOAA National Climatic Data Center (NCDC), but are produced and available from NOAA Earth System Research Laboratory (ESRL).

Instrument timeline: - Dasibi 1997-2003 - TEI49c 2003 – October 2023 - TEI49i November 2023 -present at USAP Arrival Heights laboratory

GET DATA: https://gml.noaa.gov/aftp/data/ozwv/SurfaceOzone/ARH/