Figure 2: Examples of CO2 degassing at the Starzach site. Figure reproduced from Büchau et al. (2022, Appendix A, page 62, kindly provided by the publisher under a CC-BY-4.0 license). (a) diffuse degassing, small ascending gas bubbles (during spring 2020 flooding), (b) mofette with largest diameter, examined in 2015 by Lübben and Leven (2022), (c) picture by Martin Schon in 2019, groundwater monitor well, turned into the site’s most active mofette shortly after its deployment in 2014.
Table 2: Tabular comparison of four low-cost NDIR CO2 sensors evaluated for application at the Starzach site, reproduced from Büchau et al. (2022, Appendix A, page 65, kindly provided by the publisher under a CC-BY-4.0 license)
Figure 5: Gas flow funnel system mounted over the groundwater monitoring well (Figure 1, installed in 2014, which turned into a mofette shortly after deployment) at the Starzach site in 2022. Figure reproduced from (Büchau et al., 2024a, Appendix B, page 80, licensed under CC-BY-4.0).
Figure 9: Flux-gradient setup close to the ground, next to the Starzach site’s mofette with the largest diameter (30 cm, Figure 2b, examined in 2015 by Lübben and Leven, 2022). Four Sensirion SCD30 low-cost CO2 sensors each are mounted 40 cm above and below a Campbell Scientific IRGASON eddy covariance station at 60 cm height. Measurements of this setup are shown in Figure 10 and Figure 11.
And here is my published dissertation, about quantifying the natural CO2 exhaust at the Starzach site in Southwest Germany (my result: ~10t/d):
http://hdl.handle.net/10900/176213
I used a lot of #FOSS software for all of it and it was amazing. Honorable […]
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