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Journal Article

Calibration of column-averaged CH4 over European TCCON FTS sites with airborne in-situ measurements

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons62381

Gerbig,  C.
Airborne Trace Gas Measurements and Mesoscale Modelling, Dr. habil. C. Gerbig, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62444

Kolle,  O.
Service Facility Field Measurements & Instrumentation, O. Kolle, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62457

Lavrič,  Jost V.
Tall Tower Atmospheric Gas Measurements, Dr. J. Lavrič, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62373

Feist,  D. G.
Atmospheric Remote Sensing Group, Dr. D. Feist, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Fulltext (public)

BGC1496.pdf
(Publisher version), 2MB

BGC1496D.pdf
(Publisher version), 3MB

Supplementary Material (public)

BGC1496s1.pdf
(Supplementary material), 50KB

Citation

Geibel, M. C., Messerschmidt, J., Gerbig, C., Blumenstock, T., Hase, F., Kolle, O., et al. (2012). Calibration of column-averaged CH4 over European TCCON FTS sites with airborne in-situ measurements. Atmospheric Chemistry and Physics, 12(21), 8763-8775. doi:10.5194/acp-12-8763-2012.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-DB9C-C
Abstract
The Total Carbon Column Observing Network (TCCON) is a ground-based network of Fourier Transform Spectrometer (FTS) sites around the globe, where the column abundances of CO(2), CH(4), N(2)O, CO and O(2) are measured. CO(2) is constrained with a precision better than 0.25% (1-sigma). To achieve a similarly high accuracy, calibration to World Meteorological Organization (WMO) standards is required. This paper introduces the first aircraft calibration campaign of five European TCCON sites and a mobile FTS instrument. A series of WMO standards in-situ profiles were obtained over European TCCON sites via aircraft and compared with retrievals of CO(2) column amounts from the TCCON instruments. The results of the campaign show that the FTS measurements are consistently biased 1.1%+/-0.2% low with respect to WMO standards, in agreement with previous TCCON calibration campaigns. The standard a priori profile for the TCCON FTS retrievals is shown to not add a bias. The same calibration factor is generated using aircraft profiles as a priori and with the TCCON standard a priori. With a calibration to WMO standards, the highly precise TCCON CO(2) measurements of total column concentrations provide a suitable database for the calibration and validation of nadir-viewing satellites.