The DOI matches its Crossref record; 13 of the 13 references it cites were found in a registry or an index.
Conversion of NOAA atmospheric dry air CH4 mole fractions to a gravimetrically prepared standard scale
Open accessAbstract
Sixteen mixtures of methane (CH 4) in dry air were prepared using a gravimetric technique to define a CH 4 standard gas scale covering the nominal range 300–2600 nmol mol−1. It is designed to be suitable for measurements of methane in air ranging from those extracted from glacial ice to contemporary background atmospheric conditions. All standards were prepared in passivated, 5.9 L high‐pressure aluminum cylinders. Methane dry air mole fractions were determined by gas chromatography with flame ionization detection, where the repeatability of the measurement is typically better than 0.1% (≤1.5 nmol mol−1) for ambient CH 4 levels. Once a correction was made for 5 nmol mol−1 CH 4 in the diluent air, the scale was used to verify the linearity of our analytical system over the nominal range 300–2600 nmol mol−1. The gravimetrically prepared standards were analyzed against CH 4 in air standards that define the Climate Monitoring and Diagnostics Laboratory (CMDL) CMDL83 CH 4 in air scale, showing that CH 4 mole fractions in the new scale are a factor of (1.0124 ± 0.0007) greater than those expressed in the CMDL83 scale. All CMDL measurements of atmospheric CH 4 have been adjusted to this new scale, which has also been accepted as the World Meteorological Organization (WMO) CH 4 standard scale; all laboratories participating in the WMO Global Atmosphere Watch program should report atmospheric CH 4 measurements to the world data center on this scale.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
A history of chemically and radiatively important gases in air deduced from ALE/GAGE/AGAGE
Prinn, R. G., Weiss, R. F., Fraser, P. J., Simmonds, P. G., Cunnold, D. M., Alyea, F. N., O'Doherty, S., Salameh, P., Miller, B. R., Huang, J., et al. (2000) · Journal of Geophysical Research: Atmospheres · doi:10.1029/2000jd900141 · Cited by 721
Self-citationEtheridge, D. M., Steele, L. P., Francey, R. J., & Langenfelds, R. L. (1998) · Journal of Geophysical Research: Atmospheres · doi:10.1029/98jd00923 · Cited by 600
Self-citationThe growth rate and distribution of atmospheric methane
(1994) · Journal of Geophysical Research: Atmospheres · doi:10.1029/94jd01245 · Cited by 585
Atmospheric methane levels off: Temporary pause or a new steady‐state?
Dlugokencky, E. J., Houweling, S., Bruhwiler, L., Masarie, K. A., Lang, P. M., Miller, J. B., & Tans, P. P. (2003) · Geophysical Research Letters · doi:10.1029/2003gl018126 · Cited by 430
Self-citationAtmospheric methane (CH4): Trends and seasonal cycles
Rasmussen, R. A., & Khalil, M. A. K. (1981) · Journal of Geophysical Research: Oceans · doi:10.1029/jc086ic10p09826 · Cited by 308
The global distribution of methane in the troposphere
Steele, L. P., Fraser, P. J., Rasmussen, R. A., Khalil, M. A. K., Conway, T. J., Crawford, A. J., Gammon, R. H., Masarie, K. A., & Thoning, K. W. (1987) · Journal of Atmospheric Chemistry · doi:10.1007/bf00048857 · Cited by 299
Self-citationThe Global Distribution of Methane in the Troposphere
Steele, L. P., Fraser, P. J., Rasmussen, R. A., Khalil, M. A. K., Conway, T. J., Crawford, A. J., Gammon, R. H., Masarie, K. A., & Thoning, K. W. (1987) · Scientific Application of Baseline Observations of Atmospheric Composition (SABOAC) · doi:10.1007/978-94-009-3909-7_21 · Cited by 269
Self-citationTrends of measured climate forcing agents
Hansen, J. E., & Sato, M. (2001) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.261553698 · Cited by 228
Cunnold, D., Steele, L., Fraser, P., Simmonds, P., Prinn, R., Weiss, R., Porter, L. W., O'Doherty, S., Langenfelds, R., Krummel, P., et al. (2002) · Journal of Geophysical Research Atmospheres · doi:10.1029/2001jd001226 · Cited by 164
Self-citationMasarie, K. A., Langenfelds, R. L., Allison, C. E., Conway, T. J., Dlugokencky, E. J., Francey, R. J., Novelli, P. C., Steele, L., Tans, P. P., Vaughn, B. H., et al. (2001) · Journal of Geophysical Research Atmospheres · doi:10.1029/2000jd000023 · Cited by 110
Self-citation
Cited by
The Global Methane Budget 2000–2017
Saunois, M., Stavert, A. R., Poulter, B., Bousquet, P., Canadell, J. G., Jackson, R. B., Raymond, P. A., Dlugokencky, E. J., Houweling, S., Patra, P. K., et al. (2019) · doi:10.5194/essd-2019-128 · Cited by 2,760
Self-citationThe Global Methane Budget 2000–2017
Saunois, M., Stavert, A. R., Poulter, B., Bousquet, P., Canadell, J. G., Jackson, R. B., Raymond, P. A., Dlugokencky, E. J., Houweling, S., Patra, P. K., et al. (2020) · Earth System Science Data · doi:10.5194/essd-12-1561-2020 · Cited by 2,711
Self-citationNisbet, E. G., Manning, M. R., Dlugokencky, E. J., Fisher, R. E., Lowry, D., Michel, S. E., Myhre, C. L., Platt, S. M., Allen, G., Bousquet, P., et al. (2019) · Global Biogeochemical Cycles · doi:10.1029/2018gb006009 · Cited by 735
Self-citationHigh accuracy measurements of dry mole fractions of carbon dioxide and methane in humid air
Rella, C. W., Chen, H., Andrews, A. E., Filges, A., Gerbig, C., Hatakka, J., Karion, A., Miles, N. L., Richardson, S. J., Steinbacher, M., et al. (2013) · Atmospheric Measurement Techniques · doi:10.5194/amt-6-837-2013 · Cited by 194
Isotopic signatures of anthropogenic CH4 sources in Alberta, Canada
Lopez, M., Sherwood, O. A., Dlugokencky, E. J., Kessler, R., Giroux, L., & Worthy, D. E. J. (2017) · Atmospheric Environment · doi:10.1016/j.atmosenv.2017.06.021 · Cited by 72
Self-citation
Metadata
- Authors
- Dlugokencky, E. J., Myers, R. C., Lang, P. M., Masarie, K. A., Crotwell, A. M., Thoning, K. W., Hall, B. D., Elkins, J. W., & Steele, L. P.
- Venue
- Journal of Geophysical Research: Atmospheres
- Publisher
- American Geophysical Union (AGU)
- Published
- 2005-09-24
- Volume
- 110
- Issue
- D18
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W1991391147
- Cited by
- 386
- References
- 13
- FWCI
- 9.09
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Conversion of NOAA atmospheric dry air CH4 mole fractions to a gravimetrically prepared standard scale. https://app.cochat.ai/papers/10.1029/2005jd006035
- The paper
- Dlugokencky, E. J., Myers, R. C., Lang, P. M., Masarie, K. A., Crotwell, A. M., Thoning, K. W., Hall, B. D., Elkins, J. W., & Steele, L. P. (2005). Conversion of NOAA atmospheric dry air CH4 mole fractions to a gravimetrically prepared standard scale. Journal of Geophysical Research: Atmospheres. https://doi.org/10.1029/2005jd006035
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
