Inferring high-resolution fossil fuel CO2 records at continental sites from 
combined14CO2 and CO observations

Levin, I.; Karstens, U.

doi:10.1111/j.1600-0889.2006.00244.x

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Inferring high-resolution fossil fuel CO₂ records at continental sites from combined ¹⁴CO₂ and CO observations

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Karstens, U.
Regional Scale Modelling of Atmospheric Trace Gases, Dr. U. Karstens, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

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引用

Levin, I., & Karstens, U. (2007). Inferring high-resolution fossil fuel CO₂ records at continental sites from combined ¹⁴CO₂ and CO observations. Tellus, Series B - Chemical and Physical Meteorology, 59(2), 245-250. doi:10.1111/j.1600-0889.2006.00244.x.

引用: https://hdl.handle.net/11858/00-001M-0000-000E-D555-3

要旨

An uncertainty estimate of a purely observational approach to derive hourly regional fossil fuel CO₂ offsets (Delta CO₂(foss)) at continental CO₂ monitoring sites is presented. Weekly mean C-14-based fossil fuel CO₂ mixing ratios and corresponding regional CO offsets (Delta CO) are proposed to determine weekly mean Delta CO/Delta CO₂(foss) ratios in order to derive hourly Delta CO₂(foss) mixing ratios from hourly Delta CO measurements. Respective regional model estimates of CO and CO₂(foss) are applied to test this approach and obtain root mean square errors of the correspondingly determined regional hourly fossil fuel CO₂ component. The method is further validated with campaign-based observations in Heidelberg. The uncertainty of the proposed method turns out to increase with decreasing fossil fuel CO₂ fraction ranging from about 15% up to 40% for continental Europe. Together with the uncertainty of the Delta CO/Delta CO₂(foss) ratio, which is determined by the precision of the (CO₂)-C-14 measurement, this method is still more accurate and precise than any model-based approach. [References: 12]