The selected data set is described below with metadata. Access to the data set itself can be requested via the SeaDataNet portal that gives an overview and access to marine and ocean data sets acquired and managed by European organisations. Go to: https://www.seadatanet.org
Details
| What? | ||||||||||
| Data set name | NIOZ Jetty - Chlorophyll-a in 1997 | |||||||||
| Discipline | ||||||||||
| Parameter groups | ||||||||||
| Discovery parameter | ||||||||||
| GEMET-INSPIRE themes | Oceanographic geographical features | |||||||||
| Abstract | From 1974 onwards, bucket water samples have been collected at high tide from the NIOZ sampling jetty (53°00'06'' N 4°47'21'' E), located in the Marsdiep tidal inlet between the North Sea and the Wadden Sea. Phytoplankton sampling frequency was 40–60 times per year, varying from once or twice a month in winter up to twice a week during phytoplankton spring blooms. Chlorophyll-a concentrations were assessed from 0.5 to 1 l water samples, filtered over MgCO3-coated filters. The concentrations in previous publications were calculated from the difference in spectrophotometric measurements of extinctions at 666 nm before and after acidification of the samples to correct for the extinction by chlorophyll degradation products (phaeopigments) in coastal waters at this wavelength. Serious doubts on the applicability of acidification to correct for the extinction by phaeopigments motivated us to use the original data of non-acidified values (total chlorophyll-a). On average, this back- calculation resulted in higher chlorophyll-a concentrations (n=1,344, r2 =0.98, CHLnon-acidified =1.174 CHLacidified).Reference: Philippart CJM, JM van Iperen, GC Cade´e and AF Zuur (2010) Long-term Field Observations on Seasonality in Chlorophyll-a Concentrations in a Shallow Coastal Marine Ecosystem, the Wadden Sea. Estuaries and Coasts 33:286–294 | |||||||||
| Data format | ||||||||||
| Data set creation date | 20181105 | |||||||||
| Where? | ||||||||||
| Map |
© OpenStreetMap contributors
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| Latitude | 53.001666669999999 | |||||||||
| Longitude | 4.7891666700000002 | |||||||||
| Datum | World Geodetic System 84 | |||||||||
| Measuring area type | point | |||||||||
| Sea regions | ||||||||||
| Location qualification | Landward side of the 12 NM boundary | |||||||||
| MSFD areas | Greater North Sea | |||||||||
| When? | ||||||||||
| Start date | 19970110 | |||||||||
| End date | 19971230 | |||||||||
| How? | ||||||||||
| Instrument/gear category | ||||||||||
| Platform type | ||||||||||
| Station name | NIOZ Jetty 1997 | |||||||||
| Alternative station name | NIOZ_Jetty_1997 | |||||||||
| Station start date | 19970110 | |||||||||
| Who? | ||||||||||
| Data originator | Royal Netherlands Institute for Sea Research | |||||||||
| Data custodian | Royal Netherlands Institute for Sea Research | |||||||||
| How to get data? | ||||||||||
| Data Distributor | Royal Netherlands Institute for Sea Research | |||||||||
| Database reference | ||||||||||
| Access/ordering of data | web data access with registration | |||||||||
| Access restriction | ||||||||||
| Other info | ||||||||||
| Publications | https://link.springer.com/article/10.1007%2Fs12237-009-9236-y | |||||||||
| Quality info |
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| Lineage | The data centres apply standard data quality control procedures on all data that the centres manage. Ask the data centre for details. | |||||||||
| CDI-metadata | ||||||||||
| CDI-record id | 1975902 | |||||||||
| Version | 0 | |||||||||
| CDI-record initial import date | 2014-05-21 15:28:18.937 | |||||||||
| CDI-record last update | 2014-09-08 05:53:22.890 | |||||||||
| Point of contact | Royal Netherlands Institute for Sea Research |