de.pangaea.dataset996209 und dataset PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact 2026-07-31T10:46:40Z https://doi.pangaea.de/10.1594/PANGAEA.996209 2026-07-31T10:46:39 publication Petric, Svetlana

spetric@geomar.de

author Faucher, Giulia

gfaucher@geomar.de

https://orcid.org/0000-0001-8930-477X information author Riebesell, Ulf

uriebesell@geomar.de

https://orcid.org/0000-0002-9442-452X information author PANGAEA

info@pangaea.de

https://www.pangaea.de/ information publisher tableDigital This dataset contains species-resolved phytoplankton and microzooplankton abundance and biomass data from the KOSMOS 2023 Helgoland mesocosm experiment conducted in the coastal waters off Helgoland Island in the North Sea, Germany. The experiment investigated the effects of Ocean Alkalinity Enhancement (OAE) on plankton communities during the development of a natural spring bloom. Six mesocosms (~6 m³) were subjected to an immediate dilution OAE scenario, establishing an alkalinity enhancement gradient ranging from ΔTA 0 to 1250 µmol kg⁻¹ in increments of 250 µmol kg⁻¹ through calcium-based alkalinity addition. The dataset includes taxonomically resolved phytoplankton and microzooplankton abundance (cells mL⁻¹), carbon biomass (µg C L⁻¹), functional group classifications, and World Register of Marine Species (WoRMS) taxonomic identifiers. Associated carbonate chemistry measurements, including total alkalinity (TA), dissolved inorganic carbon (DIC), pH, fugacity of carbon dioxide (fCO₂), salinity, temperature, and calculated ΔTA values are provided for each sampling event. completed Petric, Svetlana

spetric@geomar.de

principalInvestigator Abundance Biomass ciliates community composition Community composition and diversity diatoms Dinoflagellates enhancement Field experiment Helgoland Marine Carbon Dioxide Removal (mCDR) mesocosm mesocosm experiment mesocosm study microscopy microzooplankton North Sea ocean alkalinity enhancement Ocean Alkalinity Enhancement (OAE) Phytoplankton Phytoplankton biomass Phytoplankton bloom spring bloom theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact RETAKE DAM CDRmare - RETAKE: CO2 removal by alkalinity enhancement: potential, benefits and risks OceanAlkAlign Ocean Alk-Align CDRmare Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact copyright restricted copyright CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) textTable und geoscientificInformation 7.8999999999999995 7.8999999999999995 54.18330000000001 54.18330000000001 2023-03-16T00:00:00 2023-04-21T00:00:00 Type of study thematicClassification Event label thematicClassification Sample code/label thematicClassification DATE/TIME thematicClassification Day of experiment physicalMeasurement day day Treatment: dilution type thematicClassification Dilution type Treatment thematicClassification Targeted alkalinity level and mesocosm Treatment: alkalinity, total physicalMeasurement Treatment level µmol/kg µmol/kg Alkalinity, total physicalMeasurement Titration device, Metrohm, 862 Compact Titrosampler [with built-in PT1000 temperature sensor] µmol/kg µmol/kg Carbon, inorganic, dissolved physicalMeasurement Automated Infra Red Inorganic Carbon Analyzer (AIRICA), MARIANDA; coupled with Differential infrared gas analyzer, LI-COR Biosciences, LI-7000 µmol/kg µmol/kg pH thematicClassification Calculated using the CO2sys_v3.0 software (Pierrot et al. 2021) Fugacity of carbon dioxide in seawater physicalMeasurement Calculated using the CO2sys_v3.0 software (Pierrot et al. 2021) ppmv ppmv Salinity thematicClassification CTD 60M multiparameter probe (Sea & Sun Technology GmbH, Germany) Temperature, water physicalMeasurement CTD 60M multiparameter probe (Sea & Sun Technology GmbH, Germany) °C °C Species thematicClassification Reference in WoRMS Species, unique identification thematicClassification Reference in WoRMS Functional group thematicClassification Calculated Cell physicalMeasurement Microscopy; Utermöhl microscopy #/ml #/ml Biomass as carbon per volume physicalMeasurement Microscopy; Utermöhl microscopy µg/l µg/l text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.996209?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: KOSMOS_2023_Mesocosm-M1 * LATITUDE: 54.183300 * LONGITUDE: 7.900000 * DATE/TIME START: 2023-03-14T00:00:00 * DATE/TIME END: 2023-04-21T00:00:00 * LOCATION: Helgoland * CAMPAIGN: KOSMOS_2023 * METHOD/DEVICE: Mesocosm experiment 2023-03-14T00:00:00 EVENT LABEL: KOSMOS_2023_Mesocosm-M3 * LATITUDE: 54.183300 * LONGITUDE: 7.900000 * DATE/TIME START: 2023-03-14T00:00:00 * DATE/TIME END: 2023-04-21T00:00:00 * LOCATION: Helgoland * CAMPAIGN: KOSMOS_2023 * METHOD/DEVICE: Mesocosm experiment 2023-03-14T00:00:00 EVENT LABEL: KOSMOS_2023_Mesocosm-M5 * LATITUDE: 54.183300 * LONGITUDE: 7.900000 * DATE/TIME START: 2023-03-14T00:00:00 * DATE/TIME END: 2023-04-21T00:00:00 * LOCATION: Helgoland * CAMPAIGN: KOSMOS_2023 * METHOD/DEVICE: Mesocosm experiment 2023-03-14T00:00:00 EVENT LABEL: KOSMOS_2023_Mesocosm-M7 * LATITUDE: 54.183300 * LONGITUDE: 7.900000 * DATE/TIME START: 2023-03-14T00:00:00 * DATE/TIME END: 2023-04-21T00:00:00 * LOCATION: Helgoland * CAMPAIGN: KOSMOS_2023 * METHOD/DEVICE: Mesocosm experiment 2023-03-14T00:00:00 EVENT LABEL: KOSMOS_2023_Mesocosm-M9 * LATITUDE: 54.183300 * LONGITUDE: 7.900000 * DATE/TIME START: 2023-03-14T00:00:00 * DATE/TIME END: 2023-04-21T00:00:00 * LOCATION: Helgoland * CAMPAIGN: KOSMOS_2023 * METHOD/DEVICE: Mesocosm experiment 2023-03-14T00:00:00 EVENT LABEL: KOSMOS_2023_Mesocosm-M11 * LATITUDE: 54.183300 * LONGITUDE: 7.900000 * DATE/TIME START: 2023-03-14T00:00:00 * DATE/TIME END: 2023-04-21T00:00:00 * LOCATION: Helgoland * CAMPAIGN: KOSMOS_2023 * METHOD/DEVICE: Mesocosm experiment 2023-03-14T00:00:00