Mesocosm experiment Cape Verde 2012: Environmental conditions (PAR, cloud cover, pump)

DOI

Two 7-day mesocosm experiments were conducted in October 2012 at the Instituto Nacional de Desenvolvimento das Pescas (INDP), Mindelo, Cape Verde. Surface water was collected at night before the start of the respective experiment with RV Islândia south of São Vicente (16°44.4'N, 25°09.4'W) and transported to shore using four 600L food safe intermediate bulk containers. Sixteen mesocosm bags were distributed in four flow-through water baths and shaded with blue, transparent lids to approximately 20% of surface irradiation. Mesocosm bags were filled from the containers by gravity, using a submerged hose to minimize bubbles. The accurate volume inside the individual bags was calculated after addition of 1.5 mmol silicate and measuring the resulting silicate concentration. The volume ranged from 105.5 to 145 L. The experimental manipulation comprised addition of different amounts of inorganic N and P. In the first experiment, the P supply was changed at constant N supply in thirteen of the sixteen units, while in the second experiment the N supply was changed at constant P supply in twelve of the sixteen units. In addition to this, “cornerpoints” were chosen that were repeated during both experiments. Four cornerpoints should have been repeated, but setting the nutrient levels in one mesocosm was not succesfull and therefore this mesocosm also was set at the center point conditions. Experimental treatments were evenly distributed between the four water baths. Initial sampling of the mesocosms on day 1 of each run was conducted between 9:45 and 11:30. After nutrient manipulation, sampling was conducted on a daily basis between 09:00 and 10:30 for days 2 to 8.

Identifier
DOI https://doi.org/10.1594/PANGAEA.855441
Related Identifier https://doi.org/10.5194/bg-12-5647-2015
Related Identifier https://doi.org/10.5194/bg-12-6897-2015
Related Identifier https://doi.org/10.5194/bg-13-781-2016
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.855441
Provenance
Creator Kiko, Rainer ORCID logo; Hauss, Helena ORCID logo; Löscher, Carolin R ORCID logo; Engel, Anja ORCID logo; Loginova, Alexandra ORCID logo; Meyer, Judith
Publisher PANGAEA
Publication Year 2015
Funding Reference German Research Foundation https://doi.org/10.13039/501100001659 Crossref Funder ID 27542298 https://gepris.dfg.de/gepris/projekt/27542298 Climate - Biogeochemistry Interactions in the Tropical Ocean
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 858 data points
Discipline Biogeochemistry; Biospheric Sciences; Geosciences; Natural Sciences
Spatial Coverage (-25.157 LON, 16.740 LAT); Cape Verde
Temporal Coverage Begin 2012-10-02T07:00:00Z
Temporal Coverage End 2012-10-20T11:00:00Z