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| Auteurs principaux: | , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2025
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| Accès en ligne: | https://doi.org/10.1594/PANGAEA.986507 |
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| _version_ | 1867170139607138304 |
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| author | Schulz, Kai Georg Schneider, Julieta Riebesell, Ulf |
| author_facet | Schulz, Kai Georg Schneider, Julieta Riebesell, Ulf |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This dataset contains carbonate chemistry speciation data of the 2023 KOSMOS mesocosm study on Helgoland, Germany. This study tested the effects of ocean alkalinity enhancement simulating lime additions on pelagic ecosystem functioning during a spring bloom. Carbonate chemistry speciation (fCO2, pHT, calcium carbonate saturation state) was generally calculated from measurements of total alkalinity (TA) and dissolved inorganic carbon (DIC) in depth-integrated water samples. There were 12 mesocosms in total and in 6 of them an alkalinity gradient of up to +1250 umol/kg was established in steps of 250 umol/kg. In the remaining 6 the same amount of alkalinity was added only to the upper portion of the mesocosms, resulting in twice the alkalinity increase there, before being mixed in after 48 hours. The two treatments simulated the immediate dilution of TA after ship deployment as well as a delayed one from a point source. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_986507 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Carbonate chemistry speciation of the 2023 KOSMOS Helgoland experiment on the effects of ocean alkalinity enhancement on pelagic foodwebs Schulz, Kai Georg Schneider, Julieta Riebesell, Ulf Alkalinity, total; Aragonite saturation state; Bicarbonate ion; Calcite saturation state; Carbon, inorganic, dissolved; Carbonate chemistry; Carbonate ion; Carbon dioxide, dissolved; CDRmare; DAM CDRmare - RETAKE: CO2 removal by alkalinity enhancement: potential, benefits and risks; DATE/TIME; Day of experiment; ecosystem impacts; Event label; Fugacity of carbon dioxide in seawater; Helgoland; KOSMOS_2023; KOSMOS_2023_Mesocosm-M1; KOSMOS_2023_Mesocosm-M10; KOSMOS_2023_Mesocosm-M11; KOSMOS_2023_Mesocosm-M12; KOSMOS_2023_Mesocosm-M2; KOSMOS_2023_Mesocosm-M3; KOSMOS_2023_Mesocosm-M4; KOSMOS_2023_Mesocosm-M5; KOSMOS_2023_Mesocosm-M6; KOSMOS_2023_Mesocosm-M7; KOSMOS_2023_Mesocosm-M8; KOSMOS_2023_Mesocosm-M9; KOSMOS Helgoland; MESO; mesocosm experiment; Mesocosm experiment; OceanAlkAlign; Ocean Alk-Align; ocean alkalinity enhancement; pH; Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways; RETAKE; Salinity; Sample code/label; Temperature, water; Treatment; Type of study This dataset contains carbonate chemistry speciation data of the 2023 KOSMOS mesocosm study on Helgoland, Germany. This study tested the effects of ocean alkalinity enhancement simulating lime additions on pelagic ecosystem functioning during a spring bloom. Carbonate chemistry speciation (fCO2, pHT, calcium carbonate saturation state) was generally calculated from measurements of total alkalinity (TA) and dissolved inorganic carbon (DIC) in depth-integrated water samples. There were 12 mesocosms in total and in 6 of them an alkalinity gradient of up to +1250 umol/kg was established in steps of 250 umol/kg. In the remaining 6 the same amount of alkalinity was added only to the upper portion of the mesocosms, resulting in twice the alkalinity increase there, before being mixed in after 48 hours. The two treatments simulated the immediate dilution of TA after ship deployment as well as a delayed one from a point source. |
| title | Carbonate chemistry speciation of the 2023 KOSMOS Helgoland experiment on the effects of ocean alkalinity enhancement on pelagic foodwebs |
| topic | Alkalinity, total; Aragonite saturation state; Bicarbonate ion; Calcite saturation state; Carbon, inorganic, dissolved; Carbonate chemistry; Carbonate ion; Carbon dioxide, dissolved; CDRmare; DAM CDRmare - RETAKE: CO2 removal by alkalinity enhancement: potential, benefits and risks; DATE/TIME; Day of experiment; ecosystem impacts; Event label; Fugacity of carbon dioxide in seawater; Helgoland; KOSMOS_2023; KOSMOS_2023_Mesocosm-M1; KOSMOS_2023_Mesocosm-M10; KOSMOS_2023_Mesocosm-M11; KOSMOS_2023_Mesocosm-M12; KOSMOS_2023_Mesocosm-M2; KOSMOS_2023_Mesocosm-M3; KOSMOS_2023_Mesocosm-M4; KOSMOS_2023_Mesocosm-M5; KOSMOS_2023_Mesocosm-M6; KOSMOS_2023_Mesocosm-M7; KOSMOS_2023_Mesocosm-M8; KOSMOS_2023_Mesocosm-M9; KOSMOS Helgoland; MESO; mesocosm experiment; Mesocosm experiment; OceanAlkAlign; Ocean Alk-Align; ocean alkalinity enhancement; pH; Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways; RETAKE; Salinity; Sample code/label; Temperature, water; Treatment; Type of study |
| url | https://doi.org/10.1594/PANGAEA.986507 |