Thielecke, Antonia; Gomez-Saez, Gonzalo V; Fernández-Méndez, Mar (2023): KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: dissolved organic carbon and total dissolved nitrogen concentrations of water samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961216
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Published: 2023-10-19 • DOI registered: 2023-12-06
Abstract:
This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report the dissolved organic carbon and total dissolved nitrogen concentrations during a 35-day experiment, where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Sub-samples (60 mL) were syringe filtered through two pre-combusted glass fiber filters (5 h, 450 °C). To reduce clogging, one 3.1 µm GMF filter was placed on top of a 0.7 µm GFF filter. The filtrate was acidified to pH 2 with 25% HCl before storing at -20°C until analysis. The DOC and TDN concentrations were measured using a TOC-VCPH analyser (Shimadzu). Instrument accuracy was evaluated by comparison against a deep Atlantic seawater reference (Consensus Reference Material project: D. Hansell, University of Miami, USA).
Supplement to:
Thielecke, Antonia; Fernández-Méndez, Mar; Arístegui, Javier; Baumann, Moritz; Behncke, Jacqueline; Berger, Stella A; Dausmann, Veit; Georgieva, Silvia; Goldenberg, Silvan Urs; Gomez-Saez, Gonzalo V; Graco, Michelle; Heene, Toralf; Kittu, Leila; Krause, Jeffrey W; Ludwig, Andrea; Meyer, Jana; Mohrholz, Volker; Nejstgaard, Jens Christian; Ortiz Cortes, Joaquin; Schulz, Kai Georg; Smith, Alexandra; Spilling, Kristian; Sswat, Michael; Taucher, Jan; Vanharanta, Mari; Varmanen, Pia; Riebesell, Ulf (2025): Disentangling upwelling: how light and nutrient supply shape primary producers and stoichiometry in the Humboldt upwelling system. Deep Sea Research Part II: Topical Studies in Oceanography, 223, 105522, https://doi.org/10.1016/j.dsr2.2025.105522
Project(s):
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0813A: Küstennahe Auftriebsgebiete CUSCO: Auswirkungen geänderter Auftriebsintensitäten auf Struktur, Funktion und Produktivität pelagischer Nahrungsnetze im peruanischen Humboldt-Auftriebsgebiet
Horizon 2020 (H2020), grant/award no. 731065: Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean
Coverage:
Median Latitude: -12.055329 * Median Longitude: -77.235145 * South-bound Latitude: -12.056130 * West-bound Longitude: -77.235644 * North-bound Latitude: -12.054690 * East-bound Longitude: -77.234677
Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-03-15T00:00:00
Event(s):
KOSMOS_2020_Mesocosm-M1 * Latitude: -12.054828 * Longitude: -77.235211 * Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-04-02T00:00:00 * Campaign: KOSMOS_2020 (KOSMOS Peru) * Method/Device: Mesocosm experiment (MESO)
KOSMOS_2020_Mesocosm-M2 * Latitude: -12.054690 * Longitude: -77.234944 * Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-04-02T00:00:00 * Campaign: KOSMOS_2020 (KOSMOS Peru) * Method/Device: Mesocosm experiment (MESO)
KOSMOS_2020_Mesocosm-M3 * Latitude: -12.054725 * Longitude: -77.234677 * Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-04-02T00:00:00 * Campaign: KOSMOS_2020 (KOSMOS Peru) * Method/Device: Mesocosm experiment (MESO)
Comment:
Mesocosm 10 describes the control sample from the Pacific
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
826 data points