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| Main Authors: | , , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| Online Access: | https://doi.org/10.1594/PANGAEA.974403 |
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| _version_ | 1867171046881230848 |
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| author | Holthusen, Lina Aleke Bange, Hermann W Arévalo-Martínez, Damian L Badewien, Thomas Henry Höfer, Juan Löscher, Carolin Regina Marin-Arias, Camila Meyerjürgens, Jens Schlangen, Isabell Wurl, Oliver |
| author_facet | Holthusen, Lina Aleke Bange, Hermann W Arévalo-Martínez, Damian L Badewien, Thomas Henry Höfer, Juan Löscher, Carolin Regina Marin-Arias, Camila Meyerjürgens, Jens Schlangen, Isabell Wurl, Oliver |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_974403 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | The vertical distribution of methane (CH4), nutrients and chlorophyll a in Maxwell Bay (King George Island, WAP) during ECA60 expedition in December 2023 Holthusen, Lina Aleke Bange, Hermann W Arévalo-Martínez, Damian L Badewien, Thomas Henry Höfer, Juan Löscher, Carolin Regina Marin-Arias, Camila Meyerjürgens, Jens Schlangen, Isabell Wurl, Oliver Antarctica; CH4; Chilean Antarctic Expedition #60; Chlorophyll a; CTD, Sea-Bird, SBE 25plus; CTD, Sea-Bird, SBE 25plus; calculated using SBE Data Processing Version 7.22.5 and SEAWATER Routines; DATE/TIME; DEPTH, water; ECA60; ECA60_E2; Event label; Fluorometer, Turner Designs, TD-700, using acidification method (Knap et al., 1996); Gas chromatography; glacial retreat; King George Island; LATITUDE; LONGITUDE; Maxwell Bay, King George Island, Antarctic Peninsula; Methane; Methane, standard deviation; methane concentrations; Methane emissions; Nitrate; Oxygen; Phosphate; Radiation sensor, short-wave downward radiation, raw signal; Salinity; Sample code/label; sea-air flux; Southern Ocean; Temperature, air, maximum; Temperature, water; trace gases; Turbidity (Nephelometric turbidity unit); UV-visible spectrophotometer; WAP; Weather station/meteorological observation; Wind direction; Wind speed at 10 m height; WST 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. |
| title | The vertical distribution of methane (CH4), nutrients and chlorophyll a in Maxwell Bay (King George Island, WAP) during ECA60 expedition in December 2023 |
| topic | Antarctica; CH4; Chilean Antarctic Expedition #60; Chlorophyll a; CTD, Sea-Bird, SBE 25plus; CTD, Sea-Bird, SBE 25plus; calculated using SBE Data Processing Version 7.22.5 and SEAWATER Routines; DATE/TIME; DEPTH, water; ECA60; ECA60_E2; Event label; Fluorometer, Turner Designs, TD-700, using acidification method (Knap et al., 1996); Gas chromatography; glacial retreat; King George Island; LATITUDE; LONGITUDE; Maxwell Bay, King George Island, Antarctic Peninsula; Methane; Methane, standard deviation; methane concentrations; Methane emissions; Nitrate; Oxygen; Phosphate; Radiation sensor, short-wave downward radiation, raw signal; Salinity; Sample code/label; sea-air flux; Southern Ocean; Temperature, air, maximum; Temperature, water; trace gases; Turbidity (Nephelometric turbidity unit); UV-visible spectrophotometer; WAP; Weather station/meteorological observation; Wind direction; Wind speed at 10 m height; WST |
| url | https://doi.org/10.1594/PANGAEA.974403 |