SURATLANT: a 1993-2017 surface dataset in the central part of the North Atlantic subpolar gyre
|Temporal extent||1993 -2017|
|Author(s)||Reverdin Gilles1, Metzl Nicolas1, Olafsdottir Solveig2, Racapé Virginie3, Takahashi Taro4, Benetti Marion5, Valdimarsson Hedinn2, Quay Paul D.6, Benoit-Cattin Alice2, Danielsen Magnus2, Fin Jonathan1, Naamar Aïcha1, Pierrot Denis7, Sullivan Kevin7, Bringas Francis7, Goni Gustavo7|
|Affiliation(s)||1 : Sorbonne Université/CNRS/IRD/MNHN, Laboratoire d'océanographie et du climat : expérimentations et approches numériques (LOCEAN), Paris, France
2 : Marine and Freshwater Research Institute, Reykjavik, Iceland
3 : Laboratoire d’Océanographie Physique et Spatiale (LOPS), CNRS/Ifremer/IRD/UBO-IUEM, Brest, France
4 : Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, NY, USA
5 : Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland
6 : School of Oceanography, University of Washington, Seattle, WA, USA
7 : National Oceanic and Atmospheric Administration/Atlantic Oceanographic and Meteorological Laboratory, Miami, Florida, USA
The SURATLANT dataset (SURveillance ATLANTique) consists of individual data of temperature, salinity, dissolved inorganic carbon (DIC) and its isotopic composition d13CDIC, total alkalinity (At), inorganic nutrients and water stable isotopes (δ18O and δD) collected mostly from ships of opportunity since 1993 along transects between Iceland and Newfoundland. The data have been validated, qualified, and their accuracy and the overall characteristics of the data set are presented in a paper (Reverdin et al., 2018, submitted to ESSD).
The csv file provides a listing of the data with one line for each collection date. This includes collection date, position, temperature, salinity, and the measured, validated and in some cases adjusted variables, as well as a quality code following WOCE/GLODAP format. For water isotopes, a code is also provided indicating the method of measurement used. Format and units are described in the top 56 lines of the files, and the data listing starts on line 61.
An additional text-file provides a normalized average seasonal cycle of the 10 variables measured in 5 boxes between the vicinity of Newfoundland to the south-west of Iceland (corresponding to the figure 3 of the paper Reverdin et al in the References). Format and information is provided in the top 25 lines and the gridded seasonal cyle data start at line 26.
|Acknowledgements||Access to the merchant vessels run or leased by EIMSKIP has been the core for this long effort to maintain surface sampling between Iceland and Newfoundland. The nearly one hundred volunteer ship riders and their enthusiasm have been key to the success of this monitoring. The project was initiated when one of the authors, GR, was at LDEO, with initial support from this institution. NOAA/AOML and NOAA/CPO Ocean Observing and Monitoring Division have contributed by maintaining the thermosalinographs and providing XBTs on the different ships that have operated between Iceland and Newfoundland. The French effort was supported by various agencies throughout the years, and in particular INSU (for SNO SSS and by the LEFE/CYBER grant CO2SINK since 2016) and IPEV. Support by National Power Company of Iceland Landsvirkjun is acknowledged. SNAPOCO2 is acknowledged for analyzing DIC/At at LODYC/LOCEAN since 2001, and the isotopic platform of OSU Ecce Terra for analyzing delta13CDIC as well as water stable isotopes at LOCEAN since 2010. Collaboration between French and Icelandic investigators has been supported by PHC Jules Verne 2016 grant 36187YF. Support to Virginie Racapé (most recently by IFREMER) and Marion Benetti (grant from the University of Iceland in Reykjavik). The very supportive help of Christian Brunet for the analysis of DIC/At samples in 2001-2014 is also warmly acknowledged. Support from the European Integrated Project CARBOOCEAN (511176) and of the SOERE GreatGases is also acknowledged.|