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- W4386543504 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> We present analyses of a 12-year time series of continuous atmospheric measurements of O<sub>2</sub> and CO<sub>2</sub> at the Weybourne Atmospheric Observatory in the United Kingdom. These measurements are combined into the term Atmospheric Potential Oxygen (APO), a tracer that is conservative with respect to terrestrial biosphere processes. The CO<sub>2</sub>, O<sub>2</sub> and APO datasets discussed are hourly averages between May 2010 and December 2021. We include details of our measurement system and calibration procedures, and describe the main long-term and seasonal features of the time series. The 2-minute repeatability of the measurement system is approximately ±3 per meg for O<sub>2</sub> and approximately ±0.005 ppm for CO<sub>2</sub>. The time series shows average long-term trends of 2.40 ppm yr<sup>-1</sup> (2.38 to 2.42) for CO<sub>2</sub>, -24.0 per meg yr<sup>-1</sup> for O<sub>2</sub> (-24.3 to -23.8) and -11.4 per meg yr<sup>-1</sup> (-11.7 to -11.3) for APO, over the 12-year period. The average seasonal cycle peak-to-peak amplitudes are 16 ppm for CO<sub>2</sub>, 134 per meg for O<sub>2</sub>, and 68 per meg for APO. The diurnal cycles of CO<sub>2</sub> and O<sub>2</sub> vary considerably between seasons. The datasets are publicly available at <a href=https://doi.org/10.18160/Z0GF-MCWH target=_blank rel=noopener>https://doi.org/10.18160/Z0GF-MCWH</a> (Adcock et al., 2023) and have many current and potential scientific applications in constraining carbon cycle processes, such as investigating air-sea exchange of CO<sub>2</sub> and O<sub>2</sub>, and top-down quantification of fossil fuel CO<sub>2</sub>." @default.
- W4386543504 created "2023-09-09" @default.
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- W4386543504 date "2023-09-08" @default.
- W4386543504 modified "2023-10-16" @default.
- W4386543504 title "Reply on RC2" @default.
- W4386543504 doi "https://doi.org/10.5194/essd-2023-129-ac2" @default.
- W4386543504 hasPublicationYear "2023" @default.
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