The vertical distribution of methane (CH4), nutrients and chlorophyll a in Maxwell Bay (King George Island, WAP) during ECA60 expedition in December 2023

DOI

An oceanographic field campaign was conducted at the research station Base Julio Escudero on King George Island, Western Antarctica Peninsula, between December 2023 and January 2024 (Expedition ECA60). In order to investigate the distribution and sea-air fluxes of CH4, as well as the occurrence of glacial meltwater filaments and their influence on CH4 dynamics, the sampling location was chosen in Collins Bay, in close proximity to the sea terminus of Collins Glacier. Discrete water samples for methane (CH4), nutrients (NO3-, NO2- and PO4 3-), and chlorophyll a (chl a) were collected between 16 and 28 December 2023 at a time-series station at depths of 1, 5, 10, 25, 50 and 100 m. CTD casts were conducted concurrent with discrete sampling and the wind speed was recorded at a weather station on King George Island. The CH4 samples were obtained in triplicate, preserved with an aqueous solution of mercury chloride (HgCl2) and measured using gas chromatography with a flame ionization detector. Samples for nutrient analysis were filtered through 0.22 μm syringe filters (GPF), stored at -20 °C, and measured spectrophotometrically. All NO₂⁻ concentrations were below the detection limit of the instrument and thus excluded from the data set. Chl a samples were filtered through a GF/F filter, stored at -20 °C and analysed fluorometrically.

Identifier
DOI https://doi.pangaea.de/10.1594/PANGAEA.974403
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.974403
Provenance
Creator Holthusen, Lina Aleke; Bange, Hermann W ORCID logo; Arévalo-Martínez, Damian L ORCID logo; Badewien, Thomas H ORCID logo; Höfer, Juan ORCID logo; Löscher, Carolin R ORCID logo; Marin-Arias, Camila; Meyerjürgens, Jens ORCID logo; Schlangen, Isabell; Wurl, Oliver ORCID logo
Publisher PANGAEA
Publication Year 2025
Funding Reference Deutsche Forschungsgemeinschaft, Bonn https://doi.org/10.13039/501100001659 Crossref Funder ID 462668354 https://uol.de/icbm/prozesse-und-sensorik-mariner-grenzflaechen/projects/ewarp DFG Priority Program 1158 'Antarctic research and comparative investigations in Arctic ice areas' (EWARP)
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 248 data points
Discipline Design; Fine Arts, Music, Theatre and Media Studies; Humanities
Spatial Coverage (-58.848W, -62.191S, -58.807E, -62.179N); Maxwell Bay, King George Island, Antarctic Peninsula
Temporal Coverage Begin 2023-12-17T01:20:00Z
Temporal Coverage End 2023-12-28T15:37:00Z