Atmospheric methane and carbon dioxide concentrations measured during ALKOR cruise AL575 on 2022-06-29

DOI

Atmospheric carbon dioxide (CO2) and methane (CH4) concentrations were monitored during AL575 cruise on 2022-06-29 using a cavity ring down spectrometer (Picarro G2301-f CRDS) and GEOMARs 'Atmospheric Intake System' (AIS). The Picarro/AIS system was installed in the wet laboratory (starboard, main deck) of RV ALKOR and was connected by an aluminium tube to an air inlet nozzle placed at the bow of RV ALKOR. The air was pumped via the AIS intake tube with a flow rate of 2.67 litre per minute to the Picarro analyser. The atmospheric CH4, CO2, and water vapour concentrations were determined in real time at 2-3 Hz sampling rate. A time offset of 87 seconds between the air intake nozzle at the bow (6 m above sea surface) and the actual gas measurement at the Picarro was determined and the calculated flow rate considered, when correlating the gas data with navigation and weather data provided by the WERUM dship repository (https://dship.geomar.de). The weather data is published separately at doi:10.1594/PANGAEA.983833 .

Identifier
DOI https://doi.pangaea.de/10.1594/PANGAEA.982666
Related Identifier References https://doi.org/10.3289/CR_AL575
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.982666
Provenance
Creator Weiß, Tim ORCID logo; Schmidt, Mark ORCID logo; Haeckel, Matthias ORCID logo
Publisher PANGAEA
Publication Year 2025
Funding Reference Federal Ministry of Education and Research https://doi.org/10.13039/501100002347 Crossref Funder ID 03F0893A https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0893A DAM CDRmare - GEOSTOR, GEOMAR
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints); https://creativecommons.org/licenses/by/4.0/
OpenAccess false
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 1177548 data points
Discipline Earth System Research
Spatial Coverage (7.001W, 53.841S, 10.850E, 54.703N)
Temporal Coverage Begin 2022-06-29T00:00:00Z
Temporal Coverage End 2022-06-29T23:59:57Z