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Published August 1, 2012 | Published
Journal Article Open

Automated ground-based remote sensing measurements of greenhouse gases at the Białystok site in comparison with collocated in situ measurements and model data

Abstract

The in situ boundary layer measurement site in Białystok (Poland) has been upgraded with a fully automated observatory for total greenhouse gas column measurements. The automated Fourier Transform Spectrometer (FTS) complements the on-site in situ facilities and FTS solar absorption measurements have been recorded nearly continuously in clear and partially cloudy conditions since March 2009. Here, the FTS measurements are compared with the collocated tall tower data. Additionally, simulations of the Jena CO_2 inversion model are evaluated with the Białystok measurement facilities. The simulated seasonal CO2 cycle is slightly overestimated by a mean difference of 1.2 ppm ± 0.9 ppm (1σ) in comparison with the FTS measurements. CO_2 concentrations at the surface, measured at the tall tower (5 m, 90 m, 300 m), are slightly underestimated by −1.5 ppm,−1.6 ppm, and −0.7 ppm respectively during the day and by −9.1 ppm,−5.9 ppm, and −1.3 ppm during the night. The comparison of the simulated CO_2 profiles with low aircraft profiles shows a slight overestimation of the lower troposphere (by up to 1 ppm) and an underestimation in near-surface heights until 800 m (by up to 2.5 ppm). In an appendix the automated FTS observatory, including the hardware components and the automation software, is described in its basics.

Additional Information

© 2012 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. Received: 14 September 2011 – Published in Atmos. Chem. Phys. Discuss.: 8 December 2011. Revised: 7 April 2012 – Accepted: 16 July 2012 – Published: 1 August 2012. The Białystok FTS instrument was automated with fundings from the Senate of Bremen and within the framework of two European Union (EU) projects, IMECC (Infrastructure for Measurement of the European Carbon Cycle) and GEOmon (Global Earth Observation and Monitoring). The maintenance and logistical work is kindly provided by AeroMeteo Service in Białystok and the RAMCES team at LSCE (Gif-sur-Yvette, France) in Trainou. We acknowledge financial support by NASA's Program, grant number NNX11AG016, Constraining fluxes of carbon with total column measurements of CO_2 and CH_4.

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August 19, 2023
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