CVOO

Cape Verde Ocean Observatory

This observatory is composed of a mooring and a small vessel maintaining the time-series continuity at Tropical Eastern North Atlantic.

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Infrastructure Location

Study Area

Location 17° 36.468' N; -24° 15.276' E
Distance from Land 110 km
Max Depth 3603 m
Oceanographic features of area Located downwind of the Mauritanian upwelling, the Observatory provide unique information linking biological productivity and atmospheric composition. The location is critical for climate and greenhouse gas studies and for investigating dust impacts on marine ecosystems
Relevant publications isi journals Dammshäuser, A. and Croot, P. (2012) Low colloidal associations of aluminium and titanium in surface waters of the tropical Atlantic Geochimica et Cosmochimica Acta, 96 . pp. 304-318. DOI 10.1016/j.gca.2012.07.032.

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Fiedler, B., Fietzek, P., Vieira, N., Silva, P., Bittig, H. C. and Körtzinger, A. (2013) In situ CO2 and O2 measurements on a profiling float Journal of Atmospheric and Oceanic Technology, 30 . pp. 112-126. DOI 10.1175/JTECH-D-12-00043.1.

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Hanel, R., John, H. C., Meyer-Klaeden, O. and Piatkowski, U. (2010) Larval fish abundance, composition and distribution at Senghor Seamount (Cape Verde Islands) Journal of Plankton Research, 32 (11). pp. 1541-1556. DOI 10.1093/plankt/fbq076.

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Heller, M. and Croot, P. (2010) Application of a Superoxide (O2-) thermal source (SOTS-1) for the determination and calibration of O2- fluxes in seawater Analytica Chimica Acta, 667 . pp. 1-13. DOI 10.1016/j.aca.2010.03.054.

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Heller, M. and Croot, P. (2010) Kinetics of superoxide reactions with dissolved organic matter in tropical Atlantic surface waters near Cape Verde (CVOO) Journal of Geophysical Research - Oceans, 115 (C12). C12038. DOI 10.1029/2009JC006021.

Heller, M. and Croot, P. (2011) Superoxide decay as a probe for speciation changes during dust dissolution in Tropical Atlantic surface waters near Cape Verde Marine Chemistry, 126 (1-4). pp. 37-55. DOI 10.1016/j.marchem.2011.03.006.

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Heller, M., Gaiero, D. and Croot, P. (2013) Basin scale survey of marine humic fluorescence in the Atlantic: relationship to iron solubility and H2O2 Global Biogeochemical Cycles, 27 . pp. 1-14. DOI 10.1029/2012GB004427.

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Müller, C., Iinuma, Y., Karstensen, J., van Pinxteren, D., Lehmann, S., Gnauk, T. and Herrmann, H. (2009) Seasonal variation of aliphatic amines in marine sub-micrometer particles at the Cape Verde islands Atmospheric Chemistry and Physics, 9 . pp. 9587-9597.

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Ryabenko, E., Kock, A., Bange, H. W., Altabet, M. A. and Wallace, D. W. R. (2012) Contrasting biogeochemistry of nitrogen in the Atlantic and Pacific oxygen minimum zones Biogeosciences (BG), 9 . pp. 203-215. DOI 10.5194/bgd-8-8001-2011.

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Stemmler, I., Rothe, M., Hense, I. and Hepach, H. (2013) Numerical modelling of methyl iodide in the eastern tropical Atlantic Biogeosciences (BG), 10 (6). pp. 4211-4225. DOI 10.5194/bg-10-4211-2013.

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Stramma, L., Prince, E. D., Schmidtko, S., Luo, J., Hoolihan, J. P., Visbeck, M., Wallace, D. W. R., Brandt, P. and Körtzinger, A. (2012) Expansion of oxygen minimum zones may reduce available habitat for tropical pelagic fishes Nature Climate Change, 2 (1). pp. 33-37. DOI 10.1038/NCLIMATE1304.

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+1 more...

Wuttig, K., Heller, M. I. and Croot, P. (2013) Pathways of Superoxide (O2-) decay in the Eastern Tropical North Atlantic Environmental Science & Technology, 47 (18). pp. 10249-10256. DOI 10.1021/es401658t.

Relevant publications proceedings published in the context of conference

Scientific Researchers

Name Email
Prof. Dr. Arne Körtzinger <Please login to view>

Technicians

Name Email
Nuno Vieira <Please login to view>
Ivanice Monteiro <Please login to view>
Pericles Silva <Please login to view>

Status / Maintenance

System Status Operational Planned Frequency 12 month(s)
Platform Required Deep Sea Research Vessel People Involved 3
Duration of Operations 1 day(s) Cleaning Yes
Replacments Yes Download Data Yes

Data Information

Final data output format ASCII Data Quality Check Yes
Type of quality check on real-time/near-real time data Manual Real Time – Data availability target
Type of Quality check on delayed mode data Manual Delayed Mode – Data availability target
Own data management Yes Type of use of data Research
Data Management Link portal.geomar.de/
GEOSS URN
GEOSS Link

TNA

Avaliable for TNA Yes
Prefered time period for TNA From July to December
TNA Support offered Assistance and logistical support preparing small cruises to the site.
Services Available Duplicate CTD casts to 500 m: salinity, temperature, chlorophyll/fluorescence,
turbidity, oxygen, Photosynthetically Available Radiation (PAR).
• Bottle samples: 10 standard depth (10, 20, 40, 60, 80, 100, 150, 250, 350, 450 dbar) for nuts (nitrate, nitrite, phosphate, silicate), O2, DIC, TOC, TON, TA, and chlorophyll-a
Potential Additional Uses gliders and float deployments. Additional sensors can be attached to the mooring line. Eddy location.
Data Ports -Self-logging
Availability of External Power Self-powered
Instrument installation methodology

Depending on instrument

Data History

Data: This provides acess  to the most important data in the contest of CVOO.

Meta data: The Ocean Science Information System (OSIS) provides meta data for all espeditions such as dadte, location, collected parameters and a lot more. Registered users may also acess the collected data (such as CTD data) as soon as it has been published.

Bottle data: The Niskin data base is a recently developed feature. It is implemented into OSIS  and provides direct acess to the calibrated bottle data. With the integrated search function you can directly acess the data you want (e.g all Oxygen measurements from 2010-today north of 10º N”).

Near realtime data: Since November 2012, the mooring is transmitting temperature, salinity and oxygen measurements from the upper 50 meters. The data is sent every is sent every 2 hours and can be viewed on the website.

Since August 2012 a tracking software analyzes daily satellite data and tracks eddies in the eastern tropical Atlantic

Instrument installation methodology 1 per month
Observatory maintenance estimated or planned schedules April 2014
Data policy and access FixO3/EuroSITES data policy: http://www.eurosites.info/pdf/EuroSITES%20Data%20Policy.pdf
NERC data policy: http://www.nerc.ac.uk/research/sites/data/policy.asp
Additional comments
Modality of access In-Person

Software Services

Sensor type/model Software for the pre-processing Software for the post post-processing Software for the production of graphical output
CTD Seasoft V2 Seabird postprocessing Matlab

Sensors

Deployed Planned
Instrument/Sensor Type Parameter(s)
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type Parameter(s)
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type PAR Parameter(s) Radiance
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type ECO FLNTURT Parameter(s) TURB
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type ECO FLNTURT Parameter(s) CPHL
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type SBE 43 Parameter(s) DOXY
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type CTD19 PLUS V2 Parameter(s) PSAL
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments

Deployed Planned
Instrument/Sensor Type CTD19 PLUS V2 Parameter(s) PRES
Platform Buoy Manufacturer
Instrument/Sensor documentation (URL)
Sensor Type / Model Power Supply
Approximate Depth / Height Sampling interval
Calibration Samples Available Yes Frequency of Calibration Samples
Intercalibration Available Yes Intercalibration Platform
Intercalibration Frequency
Problems
Solution Adopted
Datasheet URL
Comments