ICOS ATC 14C Release analysed by ICOS CRL from Hyltemossa (150.0 m), 2015-09-23–2024-09-06 icos-sweden-k26g69zog4nycvv2bokbrwo7-0 Swedish National Data Service Svensk nationell datatjänst ICOS ATC 14C Release analysed by ICOS CRL from Hyltemossa (150.0 m), 2015-09-23–2024-09-06 icos-sweden-k26g69zog4nycvv2bokbrwo7-0 Swedish National Data Service Svensk nationell datatjänst The ICOS Central Radiocarbon Laboratory (CRL) central task is the high-precision measurement of the ¹⁴C content in atmospheric CO₂. The ¹⁴CO₂ activity is determined for grab samples (flask) as well as for two-week integrated ambient air samples. Two ¹⁴CO₂ analytical techniques are applied in the CRL: Accelerator Mass Spectrometry (AMS) in collaboration with the CEZA laboratory in Mannheim, Germany (Lux, 2019), and Low-Level gas proportional Counting (LLC) (Kromer & Münnich, 1992). The comparability of both measurement techniques is continuously monitored and was documented in Hammer et al. (2017) Lux, J. T. (2018). A new target preparation facility for high precision AMS measurements and strategies for efficient ¹⁴CO₂ sampling (Doctoral dissertation). DOI: https://doi.org/10.11588/heidok.00024767 Kromer, B., & Münnich, K. O. (1992). CO₂ gas proportional counting in radiocarbon dating—review and perspective. Radiocarbon after four decades, 184-197. DOI: https://doi.org/10.1007/978-1-4757-4249-7_13 Hammer, S., Friedrich, R., Kromer, B., Cherkinsky, A., Lehman, S. J., Meijer, H. A., ... & Uchida, M. (2017). Compatibility of Atmospheric ¹⁴CO₂ Measurements: Comparing the Heidelberg Low-Level Counting Facility to International Accelerator Mass Spectrometry (AMS) Laboratories. Radiocarbon, 59(3), 875-883. DOI: https://doi.org/10.1017/RDC.2016.62 See also CEZA laboratory: https://www.ceza.de/en Heliasz, M., Biermann, T. (2025). ICOS ATC 14C Release analysed by ICOS CRL from Hyltemossa (150.0 m), 2015-09-23–2024-09-06, ICOS RI, https://hdl.handle.net/11676/K26g69zog4nycvv2BOkbrwo7 Access to data through an external actor. Åtkomst till data via extern aktör.