Atmospheric CO2, delta (O2/N2), APO and oxidative ratios from aircraft flask 
samples over Fyodorovskoye, Western Russia

van der Laan, S.; van der Laan-Luijkx, I. T.; Rödenbeck, Christian; Varlagin, A.; Shironya, I.; Neubert, R. E. M.; Ramonet, M.; Meijer, H. A. J.

doi:10.1016/j.atmosenv.2014.08.022

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Atmospheric CO₂, delta (O₂/N₂), APO and oxidative ratios from aircraft flask samples over Fyodorovskoye, Western Russia

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Rödenbeck, Christian
Inverse Data-driven Estimation, Dr. C. Rödenbeck, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

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引用

van der Laan, S., van der Laan-Luijkx, I. T., Rödenbeck, C., Varlagin, A., Shironya, I., Neubert, R. E. M., Ramonet, M., & Meijer, H. A. J. (2014). Atmospheric CO₂, delta (O₂/N₂), APO and oxidative ratios from aircraft flask samples over Fyodorovskoye, Western Russia. Atmospheric Environment, 97, 174-181. doi:10.1016/j.atmosenv.2014.08.022.

引用: https://hdl.handle.net/11858/00-001M-0000-0023-D4AE-6

要旨

We present atmospheric CO2 and delta(O2/N2) from flask samples taken on board aircraft over Fyodorovskoye (56°27'N, 32°55'E) at heights of 3000 m and 100 m between 1998 and 2008. The long-term trends for CO2 and delta(O2/N2) are similar for both sampling heights, and also similar to observations from marine background station Mace Head (Ireland) and coastal station Lutjewad (the Netherlands). The seasonal CO2 amplitude at 100 m was almost twice as large as at 3000 m and a phase shift in the seasonality of about two weeks between both sampling heights was observed. This indicates a dominant influence on CO2 in the boundary layer from the regional biosphere which is confirmed by analysis of the delta(O2/N2) to CO2 oxidative ratio (OR). Together with simulations with the TM3 model, our data suggest that the observed OR of -1.7 ± 0.2 in the free troposphere is mainly driven by exchange processes with the ocean. Within the boundary layer an OR of -0.89 ± 0.12 was observed which supports the results of other recent studies suggesting the commonly used value of -1.1 for biospheric OR is likely too low.