Arctic Western Eurasian Basin: IAOOS 23 physical and biogeochemical profiles in 2017
|Temporal extent||2017-04-12 -2018-01-04|
|Author(s)||Provost Christine1, Sennéchael Nathalie1, Garçon Véronique2, Boles Elisabeth1, Athanase Marylou1, Koenig Zoé1, Labaste Matthieu1|
|Affiliation(s)||1 : Laboratoire LOCEAN-IPSL, Sorbonne Universites (UPMC, Univ. Paris 6)-CNRS-IRD-MNHN, Paris, France
2 : Laboratoire d'Etudes en Géophysique et d'Océanographie Spatiales (LEGOS), Toulouse, France
|Keyword(s)||Arctic, Biogeochemistry, Ocean profiles, Chlorophyll-a, Backscatter, Photosynthetically Active Radiation, Irradiance, Colored Dissolved Organic Matter, Nitrate, Eurasian Basin|
In April 2017, two Ice Atmosphere Arctic Ocean Observing System platforms (IAOOS 23 and IAOOS 24) were deployed near the North Pole. Over the next 8 months, they meandered southwards with the ice in the Transpolar Drift, collecting measurements in the upper 250 m of Amundsen Basin, Nansen Basin and Fram Strait. The ocean profilers are PROVOR SPI (from French manufacturer NKE), which includes a Seabird SBE41 CTD (Conductivity, Temperature, Depth) and a dissolved oxygen (DO) Aandera 4330 optode. IAOOS 23 also featured a bio-optics sensor suite and a submersible ultraviolet nitrate analyzer (SUNA, Satlantic-Seabird Inc.). The bio-optics sensor suite (called Pack Rem A) combines a three-optical-sensor instrument (ECO Triplet, WET Labs Inc.) and a multispectral radiometer (OCR-504, Satlantic Inc.). The present dataset is composed of chlorophyll-a fluorescence, backscatter, irradiances (at 412, 490 and 555 nm), photosynthetically active radiation (PAR), nitrate and colored-dissolved organic matter data from the IAOOS 23 platform, as well as composites of absolute salinity, conservative temperature and apparent oxygen utilization data from both profilers. The profilers were set to perform two upward profiles a day from 250 m starting at approximately 6 am and 6 pm. In this dataset, chlorophyll-a, PAR and irradiances were corrected with a shift to set dark values to zero. Nitrate was interpolated vertically every 5 m, and all other parameters were interpolated vertically every 0.5 m.
|Utilisation||Data are published without any warranty, express or implied. The user assumes all risks arising from his/her use of data. Data are intended to be research-quality. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. Authors welcome users to ask questions and report problems.|
|Acknowledgements||The IAOOS platforms were developed with funding from Equipex IAOOS (Ice Atmosphere Ocean Observing System; ANR-10- EQPX-32-01), and biogeochemical sensors added to the platform through funding from the ICE-ARC program from the European Union 7th Framework Progamme (grant number 603887). We are deeply grateful to the many people who participated in the development and tests of the biogeochemical profiler at Ifremer facilities in Brest (France) and during the N-ICE 2015 ice camp from RV Lance north of Svalbard: Magali Garracio, Antoine Guillot, Christine Drezen and Michel Calzas, Nicolas Villacieros Robineau, Jean-Philippe Savy and Victoire Rérolle. We thank Matthieu Labaste, Victoire Rérolle and Sergey Pisarev for their contribution to the preparation and deployment of the IAOOS platforms from the North Pole in April 2017. Magali Garracio was essential to the data recovery and decoding processes. Discussions with Catherine Schmechtig on the data processing and Carole Barus for project management for CNRS-LEGOS partner within the ICE-ARC programme are gratefully acknowledged.|
On IAOOS 23 plaform, the ocean profiler was a PROVOR SPI (from French manufacturer NKE) equipped with a Seabird SBE41 CTD (Conductivity, Temperature, Depth) and a dissolved oxygen (DO) Aandera 4330 optode (presented in a distinct related data set). For the first time, the profiler on IAOOS 23 also carried a bio-optics sensor suite and a submersible ultraviolet nitrate analyzer (SUNA, Satlantic-Seabird Inc.). The bio-optics sensor suite (called Pack Rem A) combines a three-optical-sensor instrument (ECO Triplet, WET Labs Inc.) and a multispectral radiometer (OCR-504, Satlantic Inc.).