Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes

@misc{https://doi.org/10.18160/v1y4-ntk0,
  doi = {10.18160/V1Y4-NTK0},
  url = {https://meta.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V},
  author = {Dasgupta, Bibhasvata and Menoud, Malika and van der Veen, Carina and Levin, Ingeborg and Moossen, Heiko and Englund Michel, Sylvia and Sperlich, Peter and Morimoto, Shinji and Fujita, Ryo and Umezawa, Taku and Platt, Stephen Matthew and Groot Zwaaftink, Christine and Lund Myhre, Cathrine and Fisher, Rebecca and Lowry, David and Nisbet, Euan and France, James and Woolley Maisch, Ceres and Brailsford, Gordon and Moss, Rowena and Goto, Daisuke and Pandey, Sudhanshu and Houweling, Sander and Warwick, Nicola and Röckmann, Thomas},
  keywords = {ch4 clumped isotopes, δ13CH4, δDCH3D},
  title = {Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes},
  publisher = {ICOS ERIC -- Carbon Portal},
  year = {2025},
  copyright = {Creative Commons Attribution 4.0 International}
}

TY  - DATA
T1  - Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes
AU  - Dasgupta, Bibhasvata
AU  - Menoud, Malika
AU  - van der Veen, Carina
AU  - Levin, Ingeborg
AU  - Moossen, Heiko
AU  - Englund Michel, Sylvia
AU  - Sperlich, Peter
AU  - Morimoto, Shinji
AU  - Fujita, Ryo
AU  - Umezawa, Taku
AU  - Platt, Stephen Matthew
AU  - Groot Zwaaftink, Christine
AU  - Lund Myhre, Cathrine
AU  - Fisher, Rebecca
AU  - Lowry, David
AU  - Nisbet, Euan
AU  - France, James
AU  - Woolley Maisch, Ceres
AU  - Brailsford, Gordon
AU  - Moss, Rowena
AU  - Goto, Daisuke
AU  - Pandey, Sudhanshu
AU  - Houweling, Sander
AU  - Warwick, Nicola
AU  - Röckmann, Thomas
DO  - 10.18160/V1Y4-NTK0
UR  - https://meta.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V
AB  - This dataset comprises high-precision atmospheric methane (CH4) mole fraction measurements and isotopic compositions (δ13C-CH4 and δD-CH4), collected from eight laboratories operating at high-latitude stations in both hemispheres between 1988 and 2023. Each record includes timestamped values (DateTimeISO, Year, Month, Day, Hour, Minute, Second), laboratory identifiers, CH4 mole fractions and their associated uncertainties, isotopic ratios and uncertainties for both Northern and Southern Hemisphere sites, as well as metadata such as the number of data points and quality flags. The dataset has been harmonised using a nearest-neighbour approach and corrected for interlaboratory offsets to produce hemisphere-specific time series aligned to the MPI-BGC methane isotope and mole fraction scale. All data sources are listed in the included data provider listing. The dataset supports B. Dasgupta et al. (2025). Harmonisation of methane isotope ratio measurements from different laboratories using atmospheric samples, submitted to Atmospheric Measurement Techniques.
KW  - ch4 clumped isotopes
KW  - δ13CH4
KW  - δDCH3D
PY  - 2025
PB  - ICOS ERIC -- Carbon Portal
ER  -