Methane standard gases for atmospheric measurements at the MRI and JMA and intercomparison experiments

Matsueda, Hidekazu; Sawa, Yousuke; Wada, Atsushi; Inoue, Hisayuki; Suda, Ken; Hirano, Yoshiaki; Tsuboi, Kazuhiro; Nishioka, Sakiko

doi:10.2467/mripapers.54.91

Cited by 19 publications

(32 citation statements)

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“…To improve our current understanding, it is necessary to consolidate all of the atmospheric CH 4 measurements taken at ground-based stations (e.g., Dlugokencky et al, 2009) and on ships (e.g., Terao et al, 2011) and aircraft (e.g., Umezawa et al, 2012) around the world. However, measurements of CH 4 mole fractions by various laboratories can differ by as much as ~2%, which is considerably greater than analytical precision of ~0.1% (e.g., Matsueda et al, 2004;Dlugokencky et al, 2005). These differences are due in large part to differences in the standard gases used in the analyses.…”

Section: Introductionmentioning

confidence: 99%

“…In 2000, the Japan Meteorological Agency (JMA) established a CH 4 standard gas scale with a new calibration system based on independent gravimetric standards purchased from a Japanese gas company (Matsueda et al, 2004). On the other hand, the National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory has developed a new gravimetric scale (NOAA04), which has been accepted by the WMO as the CH 4 mole fraction scale (Dlugokencky et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…All of the standard gases were prepared with dry purified air as the diluent gas by Japan Fine Products (JFP; formerly Nippon Sanso Corporation, Japan). Details of the original sets ("First sets" in Table 1) of standards held at MRI and JMA have been reported elsewhere (Matsueda, 1993;Matsueda et al, 2004), so only a brief description is given here.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Scale and stability of methane standard gas in JMA and comparison with MRI standard gas

Tsuboi¹,

Matsueda²,

Sawa³

et al. 2016

Pap. Meteor. Geophys.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Scale and stability of methane standard gas in JMA and comparison with MRI standard gas

Tsuboi¹,

Matsueda²,

Sawa³

et al. 2016

Pap. Meteor. Geophys.

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“…The observations used in this study are concentration measurements performed at surface stations for MCF (Montzka et al, 2000), CH 4 (Dlugokencky et al, 1994;Cunnold et al, 2002;Worthy et al, 1998), H 2 (Novelli et al, 1999) and CO (Novelli et al, 1992) from various networks (NOAA (Conway et al, 1994), CSIRO , AGAGE (Prinn et al, 2000), NIWA (Lowe et al, 1991), JMA/MRI (Matsueda et al, 2004)) available on the World Data Centre for Greenhouse Gases (WDCGG) site at http://gaw.kishou. go.jp/wdcgg/.…”

Section: Atmospheric Measurementsmentioning

confidence: 99%

Multi-species inversion of CH<sub>4</sub>, CO and H<sub>2</sub> emissions from surface measurements

et al. 2009

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Abstract. In order to study the spatial and temporal variations of the emissions of greenhouse gases and of their precursors, we developed a data assimilation system and applied it to infer emissions of CH 4 , CO and H 2 for one year. It is based on an atmospheric chemical transport model and on a simplified scheme for the oxidation chain of hydrocarbons, including methane, formaldehyde, carbon monoxide and molecular hydrogen together with methyl chloroform. The methodology is exposed and a first attempt at evaluating the inverted fluxes is made. Inversions of the emission fluxes of CO, CH 4 and H 2 and concentrations of HCHO and OH were performed for the year 2004, using surface concentration measurements of CO, CH 4 , H 2 and CH 3 CCl 3 as constraints. Independent data from ship and aircraft measurements and satellite retrievals are used to evaluate the results. The total emitted mass of CO is 30% higher after the inversion, due to increased fluxes by up to 35% in the Northern Hemisphere. The spatial distribution of emissions of CH 4 is modified by a decrease of fluxes in boreal areas up to 60%. The comparison between mono-and multi-species inversions shows that the results are close at a global scale but may significantly differ at a regional scale because of the interactions between the various tracers during the inversion.

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“…The standards are filled in 48 L aluminum high-pressure cylinders, which are prepared using a volumetric method by a gas company (Japan Fine Products Corp., (JFP), Oyama, Japan). The drifts of the working standards are regularly investigated by comparing them with the JMA primary standard gases using a standard gas calibration system (e.g., Matsueda et al, 2004). In this JMA standard gas calibration system, CO 2 is analyzed by an NDIR (HORIBA Ltd., Kyoto, Japan, model VA510R), while other trace gases are analyzed by gas chromatographs (GCs) equipped with a flame ionization detector (GC/FID: Shimadzu, Co., Ltd., Kyoto, Japan, model GC14B) for CH 4 , a reduction gas detector (GC/HgO: RoundScience, Co., Ltd., Kyoto, Japan, model TRA-1) for CO, and an electron capture detector (GC/ECD: Shimadzu Co., Ltd., Kyoto, Japan, model GC-2014) for N 2 O, respectively.…”

Section: Standard Gasesmentioning

confidence: 99%

Evaluation of a new JMA aircraft flask sampling system and laboratory trace gas analysis system

Tsuboi¹,

Matsueda²,

Sawa³

et al. 2013

Atmos. Meas. Tech.

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We established and evaluated a flask air sampling system on a cargo C-130H aircraft, as well as a trace gas measurement system for the flask samples, as part of a new operational monitoring program of the Japan Meteorological Agency (JMA). Air samples were collected during each flight, between Kanagawa Prefecture (near Tokyo) and Minamitorishima (an island located nearly 2000 km southeast of Tokyo), from the air-conditioning system on the aircraft. Prior to the operational employment of the sampling system, a quality assurance test of the sampled air was made by specially coordinated flights at a low altitude of 1000 ft over Minamitorishima and comparing the flask values with those obtained at the surface. Based on our storage tests, the flask samples remained nearly stable until analyses. The trace gas measurement system has, in addition to the nondispersive infrared (NDIR) and vacuum ultraviolet resonance fluorescence (VURF) analyzers, two laser-based analyzers using wavelength-scanned cavity ring-down spectroscopy (WS-CRDS) and off-axis integrated cavity output spectroscopy (ICOS). Laboratory tests of the laser-based analyzers for measuring flask samples indicated relatively high reproducibility with overall precisions of less than ±0.06 ppm for CO₂, ±0.68 ppb for CH₄, ±0.36 ppb for CO, and ±0.03 ppb for N₂O. Flask air sample measurements, conducted concurrently on different analyzers were compared. These comparisons showed a negligible bias in the averaged measurements between the laser-based measurement techniques and the other methods currently in use. We also estimated that there are no significant isotope effects for CH₄, CO and N₂O using standard gases with industrial isotopic compositions to calibrate the laser-based analyzers, but CO₂ was found to possess isotope effects larger than its analytical precision

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Methane standard gases for atmospheric measurements at the MRI and JMA and intercomparison experiments

Cited by 19 publications

References 50 publications

Scale and stability of methane standard gas in JMA and comparison with MRI standard gas

Scale and stability of methane standard gas in JMA and comparison with MRI standard gas

Multi-species inversion of CH<sub>4</sub>, CO and H<sub>2</sub> emissions from surface measurements

Evaluation of a new JMA aircraft flask sampling system and laboratory trace gas analysis system

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Methane standard gases for atmospheric measurements at the MRI and JMA and intercomparison experiments

Cited by 19 publications

References 50 publications

Scale and stability of methane standard gas in JMA and comparison with MRI standard gas

Scale and stability of methane standard gas in JMA and comparison with MRI standard gas

Multi-species inversion of CH&lt;sub&gt;4&lt;/sub&gt;, CO and H&lt;sub&gt;2&lt;/sub&gt; emissions from surface measurements

Evaluation of a new JMA aircraft flask sampling system and laboratory trace gas analysis system

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Product

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Multi-species inversion of CH<sub>4</sub>, CO and H<sub>2</sub> emissions from surface measurements