Work Package 3PROCEDURAL HARMONISATION

Task 3.1: Assessment of procedures

FixO3 General Assembly 14th to the 16th October 2014, Heraklion-CRETE

Pericles Silva, NationaI nstitute for Fisheries Development.

E-mail: pericles.silva@indp.gov.cv

WP 3 – Procedural HarmonisationTask 3.1: Assessment of procedures

Part of the Cape Verde Observatory which consists of operational atmosphere and ocean monitoring sites for various climate-relevant environmental parameters in the tropical Eastern North Atlantic Ocean.

MOORING: 17.6°N 24.3°W, HIDROSTATION: 17° 35.000' N -24° 17.000' E

MOORING April 2014 - present description Measurements: Salinity, Temperature, Pressure, Oxygen, pCO2, ADCP, Currents, Sediment Trap, Fluorometer. (instruments, sensors , etc),

CTD sensors on RV Islandia:• Sea-Bird SBE 32 (12 niskins, 5L)• Sea-Bird SBE 19plus (CTD)• Sea-Bird SBE 33 (deck unit)• Sea_Bird SBE 5T (pump)• Sea-Bird SBE 43 (oxygen)• Biospherical QSP-2350 (PAR)• Biospherical QSP-2200 (PAR deck)• WETLabs ECO FLNTURT (fluorescence/turbidity)

LABORATORY

Key persons involved data management:Bjoern Fiedler – Data manager (GEOMAR)Pericles Silva – Site Manager (INDP)

WP 3 – Procedural HarmonisationTask 3.1: Assessment of procedures

Before sailing should test the operation of the - Carousel verifying communication with the CTD, recording data.

• All sampling bottles must be cleaned, tubes, gluves, reagents prepared, etc

• Maintenance/service: before and after all cruises.

• Calibration issues: should be done annualy (no budged).

• GPS loger connected for tracking.

WP 3 – Procedural HarmonisationTask 3.1: Assessment of procedures

At the station, the CTD is prepared for the casts. Lower equipment to a depth of 7 m and keep that level for 5 minutes for the sensor to reach equilibrium. The downcast must be at a rate of 0.75 to 1 m s-1 to the desired depth (500m)

• Means: R/V Islandia

After cast: • Samples collected immediately.• CTD rinsed with fresh water; pump filled with Milli-Q water; connection with silicone.• Samples stored.

Parameters: Salinity, Temperature, Nutrients, DO, DIC, TOC, POC/PON, TA, Chl-a Fluorescence/Turbidity, Photoactive radiation (PAR)

Data processing for each cruise consists of converting the raw data in scientific units from which variables of interest are calculated and some lab. Analyses.

• Data transfer:https://portal.geomar.de/group/cvoo/s• Laboratory analyses: after cruises for DO, Nuts, Chl-a• Data post processing: Data, metadata sent to GEOMAR.

WP 3 – Procedural HarmonisationTask 3.1: Assessment of procedures