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Journal Article

Calibration of atmospheric hydrogen measurements

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons62423

Jordan,  Armin
Service Facility Gas Analytical Laboratory, Dr. A. Jordan, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62570

Steinberg,  Bert
Service Facility Gas Analytical Laboratory, Dr. A. Jordan, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Fulltext (public)

BGC1443.pdf
(Publisher version), 365KB

BGC1443D.pdf
(Preprint), 594KB

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There is no public supplementary material available
Citation

Jordan, A., & Steinberg, B. (2011). Calibration of atmospheric hydrogen measurements. Atmospheric Measurement Techniques, 4(3), 509-521. doi:10.5194/amt-4-509-2011.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-DBD5-8
Abstract
Interest in atmospheric hydrogen (H-2) has been growing in recent years with the prospect of H-2 being a potential alternative to fossil fuels as an energy carrier. This has intensified research for a quantitative understanding of the atmospheric hydrogen cycle and its total budget, including the expansion of the global atmospheric measurement network. However, inconsistencies in published observational data constitute a major limitation in exploring such data sets. The discrepancies can be mainly attributed to difficulties in the calibration of the measurements. In this study various factors that may interfere with accurate quantification of atmospheric H-2 were investigated including drifts of standard gases in high pressure cylinders. As an experimental basis a procedure to generate precise mixtures of H-2 within the atmospheric concentration range was established. Application of this method has enabled a thorough linearity characterization of the commonly used GC-HgO reduction detector. We discovered that the detector response was sensitive to the composition of the matrix gas. Addressing these systematic errors, a new calibration scale has been generated defined by thirteen standards with dry air mole fractions ranging from 139-1226 nmol mol(-1). This new scale has been accepted as the official World Meteorological Organisation's (WMO) Global Atmospheric Watch (GAW) H-2 mole fraction scale.