ICOS CAL - Quality Control Report 2022

@article{https://doi.org/10.18160/sa0x-sf4z,
  doi = {10.18160/SA0X-SF4Z},
  url = {https://meta.icos-cp.eu/objects/3Rcf06gvgPea9tCxfxOVcRFw},
  author = {Jordan, Armin and Damak, Fadwa},
  keywords = {Quality Control, Calibration, Measurement uncertainty, Greenhouse Gases},
  title = {ICOS CAL - Quality Control Report 2022},
  publisher = {ICOS CAL},
  year = {2023},
  copyright = {Creative Commons Attribution 4.0 International}
}

TY  - RPRT
T1  - ICOS CAL - Quality Control Report 2022
AU  - Jordan, Armin
AU  - Damak, Fadwa
DO  - 10.18160/SA0X-SF4Z
UR  - https://meta.icos-cp.eu/objects/3Rcf06gvgPea9tCxfxOVcRFw
AB  - The ICOS Central Analytical Laboratories (CALs) play a central role in assuring the accuracy of atmospheric observations within ICOS. This involves the central provision of reference gases to the ICOS atmospheric network and calibrating these standards based on the World Meteorological Organization (WMO) calibration scales. A quality control strategy for the ICOS atmospheric measurements has been described within the Atmospheric Station Specification document [ATC 2020].
In this report the quality control measures are described that are made by the ICOS-CAL Flask and Calibration Laboratory (FCL) to characterize the performance of their calibration of ICOS reference gases. It updates and replaces the QC 2020 report following the same assessment scheme with only minor changes and some few corrections. The results of these activities of the recent years are presented in detail for each of the ICOS core components for in-situ observations (CO2, CH4, CO) and N2O. The results are then assessed and used to substantiate estimates of the measurement uncertainties of the different tracers and to quantify different uncertainty contributions. This involves an evaluation of the uncertainty of the reference values of calibration standard gases ("scale link uncertainty") and the measurement uncertainty related to the respective analyzer’s precision or response stability over time.
Based on further evidence obtained in 2022 the assumption of a Primary Standard gas set with stable CO2 appears justified.
This report is a deliverable (D7) of Annex 2 to the Cooperation Agreement between ICOS ERIC and the Max-Planck-Society that is the host organization for the ICOS Flask and Calibration Laboratory (FCL).
KW  - Quality Control
KW  - Calibration
KW  - Measurement uncertainty
KW  - Greenhouse Gases
PY  - 2023
PB  - ICOS CAL
ER  -