Name: Pre-processed chlorophyll-a data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 218, September 2015
License: https://creativecommons.org/licenses/by-sa/4.0/

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Title	Pre-processed chlorophyll-a data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 218, September 2015
Project	Integrated Ecosystem Programme: Southern Benguela (IEP: SB)
Authors	Mfundo Lombi Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Control Technician 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, mlombi@environment.gov.za Keshnee Pillay Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, KePillay@environment.gov.za
Publisher	Department of Forestry, Fisheries and the Environment (2017)
Contributors	Contact Person: Keshnee Pillay Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, KePillay@environment.gov.za
Abstract	This is pre-processed chlorophyll-a data from the St Helena Bay Monitoring Line September 2015 cruise (now under the Integrated Ecosystem Programme: Southern Benguela). The St Helena Bay Monitoring Line was initiated as a BENEFIT-driven project on "shipboard monitoring" which linked with similar lines run in Namibia and Angola. The aims are to obtain seasonal and interannual information on the hydrology and productivity of the area. Data on harmful algal blooms, low oxygen water and intrusions of Agulhas Bank water along the west coast will also be collected. A long-term, multi-decadel time-series (from 1951 onward) of information already exists for this important region and has continued in the form of the IEP:SB to detect long-term changes in the hydrology and the plankton, which are important for the detection of regime shifts.
Methods	This dataset was derived from discrete Chl-a data from the RV Algoa Voyage 218, 16 September 2015 - 23 September 2015. The following fluorometric chlorophyll sampling and analysis procedure was followed:- Tapped 200ml sea water from CTD bottle into sampling bottle.- Filtered through a 2.5cm GFF at a vacuum not exceeding 30cm of Mercury.- Folded filter in half, encasing sample on the inside, using tweezers.- Wrapped in foil of a decent size to accommodate full identification.- Wrote identification clearly on the foil: Grid number and Depth.- Placed all the samples from a station, in order, in a plastic bag or foil wrap and labelled with Voyage No, Ships No and Grid No- Put in a labeled jar in the freezer.- Recorded the volume filtered next to the correct depth on both, the Phys/ Chem and biological deck chits.- Removed samples from jar and put samples into test tube and covered in acetone.- Placed test tubes into fluorometer to get chlorophyll value.- Applied calibration coefficient to the chlorophyll value based on the fluorometers calibration.Data and metadata is recorded in an excel spreadsheet from the relevant deck chits and instruments (fluorometer).
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Terms of use These data are made available with the express understanding that any such use will properly acknowledge the originator(s) and publisher and cite the accession numbers and/or associated Digital Object Identifiers. Anyone wishing to use these data should properly cite and attribute the data providers listed as authors in the metadata provided with each dataset. It is expected that all the conditions of the data license will be strictly honoured. Use of any material herein should be properly cited using the dataset’s persistent identifiers such as accession numbers and DOIs. I agree to the terms of use
Temporal extent	16 Sep 2015 – 28 Sep 2015
Geographic extent	Southern Benguela, West coast of South Africa, Kleinsee Monitoring Line, Namaqua Monitoring Line, St Helena Bay Monitoring Line, Scarborough Monitoring Line North: -28.7535480371 South: -34.9911930887 West: 14.5463131624 East: 18.6441020704
Keywords	Algoa, Algoa 218, NISKIN BOTTLES, Niskin Water Sampling Bottles, SOUTH ATLANTIC OCEAN
Related resources	This digital object is part of Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 218, September 2015 (10.15493/dea.mims.26052233)

Terms of use