12 years of continuous atmospheric O<sub>2</sub>, CO<sub>2</sub> and APO data from Weybourne Atmospheric Observatory in the United Kingdom
<p>We present a 12-year time series of continuous atmospheric measurements of O<span class="inline-formula"><sub>2</sub></span> and CO<span class="inline-formula"><sub>2</sub></span> at the Weybourne Atmospheric Observatory in...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-11-01
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| Series: | Earth System Science Data |
| Online Access: | https://essd.copernicus.org/articles/15/5183/2023/essd-15-5183-2023.pdf |
| Summary: | <p>We present a 12-year time series of continuous atmospheric measurements of O<span class="inline-formula"><sub>2</sub></span> and CO<span class="inline-formula"><sub>2</sub></span> at the Weybourne Atmospheric Observatory in the United Kingdom. These measurements are combined into the term atmospheric potential oxygen (APO), a tracer that is invariant to terrestrial biosphere fluxes. The CO<span class="inline-formula"><sub>2</sub></span>, O<span class="inline-formula"><sub>2</sub></span> 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 min repeatability of the measurement system is approximately <span class="inline-formula">±3</span> per meg for O<span class="inline-formula"><sub>2</sub></span> and approximately <span class="inline-formula">±0.005</span> ppm for CO<span class="inline-formula"><sub>2</sub></span>. The time series shows average long-term trends of 2.40 ppm yr<span class="inline-formula"><sup>−1</sup></span> (2.38 to 2.42) for CO<span class="inline-formula"><sub>2</sub></span>, <span class="inline-formula">−24.0</span> per meg yr<span class="inline-formula"><sup>−1</sup></span> for O<span class="inline-formula"><sub>2</sub></span> (<span class="inline-formula">−24.3</span> to <span class="inline-formula">−23.8</span>) and <span class="inline-formula">−11.4</span> per meg yr<span class="inline-formula"><sup>−1</sup></span> (<span class="inline-formula">−11.7</span> to <span class="inline-formula">−11.3</span>) for APO, over the 12-year period. The average seasonal cycle peak-to-peak amplitudes are 16 ppm for CO<span class="inline-formula"><sub>2</sub></span>, 134 per meg for O<span class="inline-formula"><sub>2</sub></span> and 68 per meg for APO. The diurnal cycles of CO<span class="inline-formula"><sub>2</sub></span> and O<span class="inline-formula"><sub>2</sub></span> vary considerably between seasons. The datasets are publicly available at <a href="https://doi.org/10.18160/Z0GF-MCWH">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<span class="inline-formula"><sub>2</sub></span> and O<span class="inline-formula"><sub>2</sub></span> and top-down quantification of fossil fuel CO<span class="inline-formula"><sub>2</sub></span>.</p> |
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| ISSN: | 1866-3508 1866-3516 |