frontiers 
in Marine Science 
SYSTEMATIC REVIEW 
published: 15 September 2020 
doll: 10.23389/fmars.2020.00700 
Check fo 
update: 
Argo Data 1999-2019: Two Million 
Temperature-Salinity Profiles and 
Subsurface Velocity Observations 
From a Global Array of Profiling 
Floats 
Annie P. S. Wong '*, Susan E. Wijffels*, Stephen C. Riser', Sylvie Pouliquen®, 
Shigeki Hosoda*, Dean Roemmich®, John Gilson®, Gregory C. Johnson®, Kim Martini”, 
David J. Murphy”, Megan Scanderbeg®, T. V. S. Udaya Bhaskar®, Justin J. H. Buck®, 
Frederic Merceur®, Thierry Carval®, Guillaume Maze ”, Cecile Cabanes’°, Xavier Andre! 
Noe Poffa®, Igor Yashayaev’°, Paul M. Barker’®, Stephanie Guinehut'*, 
Mathieu Belbeoch’°, Mark Ignaszewski’°, Molly O’Neil Baringer?”, Claudia Schmid”, 
John M. Lyman®®, Kristene E. McTaggart®, Sarah G. Purkey*®, Nathalie Zilberman®, 
Matthew B. Alkire', Dana Swift’, W. Brechner Owens®*, Steven R. Jayne®, Cora Hersh®, 
Delle Robbins*, Deb West-Mack®, Frank Bahr®, Sachiko Yoshida®, Philip J. H. Sutton” 
Romain Cancou&t*°, Christine Coatanoan®, Delphine Dobbler®, Andrea Garcia Juan®, 
Jeröme Gourrion®', Nicolas Kolodziejeczyk'°, Vincent Bernard®, Bernard Bourles*, 
Herve Claustre*, Fabrizio D’Ortenzio*®, Serge Le Reste’, Pierre-Yve Le Traon**, 
Jean-Philippe Rannou*, Carole Saout-Grit”®, Sabrina Speich*”, Virginie Thierry”, 
Nathalie Verbrugge*, Ingrid M. Angel-Benavides*®, Birgit Klein*®, Giulio Notarstefano®, 
Pijerre-Marie Poulain*®, Pedro Velez-Belchi®, Toshio Suga*, Kentaro Ando*, 
Naoto Iwasaska*, Taiyo Kobayashi*, Shuhei Masuda*, Eitarou Oka®, Kanako Sato*, 
Tomoaki Nakamura*, Katsunari Sato*, Yasushi Takatsuki**, Takashi Yoshida*, 
Rebecca Cowley®, Jenny L. Lovell®, Peter R. Oke®, Esmee M. van Wijk®, 
Fiona Carse”, Matthew Donnelly?, W. John Gould, Katie Gowers®, Brian A. King“, 
Stephen G. Loch®, Mary Mowat®, Jon Turton”, E. Pattabhi Rama Rao®, 
M. Ravichandran®, Howard J. Freeland*, Isabelle Gaboury“, Denis Gilbert®, 
Blair J. W. Greenan’®, Mathieu Quellet*, Tetjana Ross“, Anh Tran*, Mingmei Dong“, 
Zenghong Liu®, Jianping Xu”, KiRyong Kang“, HyeongJun Jo*, Sung-Dae Kim“ and 
Hyuk-Min Park? 
OPEN ACCESS 
Edited by: 
Johannes Karstensen, 
GEOMAR Heimholtz Center for Ocean 
Research Kiel, Germany 
Reviewed by: 
Borja Aguiar-Gonzalez, 
University of Las Palmas de Gran 
Canaria, Spain 
Fabien Roquet, 
University of Gothenburg, Sweden 
School of Oceanography, University of Washington, Seattle, WA, United States, * Woods Hole Oceanographic Institution, 
Falmouth, MA, United States, ° Ifremer, IRSI, Plouzane, France, * Japan Agency for Marine-Earth Science and Technology, 
rokosuka, Japan, * Scripps Institution of Oceanography, La Jolla, CA, United States, ° NOAA/Pacific Marine Environmental 
'aboratory, Seattle, WA, United States, 7 Sea-Bird Scientific, Bellevue, WA, United States, * Indian National Centre for Ocean 
Information Services, Ministry of Earth Sciences, Hyderabad, India, ° British Oceanographic Data Centre, National 
Deeanography Centre, Liverpool, United Kingdom, '° University of Brest, Ifremer, CNRS, IRD, LOPS, Plouzane, France, 
' fremer, RDT-SIM, Plouzane, France, '® Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS. 
Canada, '* School of Mathematics and Statistics, University of New South Wales, Sydney, NSW, Australia, ** Collecte 
'ocalisation Satellites, Ramonville-Saint-Agne, France, *° JCOMMOPS, Plouzane, France, '° Fleet Numerical Meteorology 
and Oceanography Center, Monterey, CA, United States, '7 NOAA/Atlantic Oceanographic and Meteorological Laboratory, 
Miami, FL, United States, '® JIMAR, University of Hawal’i at Manoca, Honolulu, HI, United States, '° National Institute of Water 
and Atmospheric Research (NIWA), Wellington, New Zealand, © Euro-Argo ERIC, Plouzane, France, °' OceanScope, 
Ylouzane, France, * IRD, IMAGO, Technopole Pointe du Diable, Plouzane, France, °*°LOV, CNRS, Sorbonne Universite, 
/illefranche-sur-Mer, France, ** Mercator-Ocsan International, Ramonville-Saint-Agne, France, © ALTRAN Quest, Technopole 
Brest Iroise, Site du Vernis, Brest, France, % Glazeo, Nantes, France, °7 LMD-IPSL, Departement de Geosciences, ENS, PSL 
Research University, Paris, France, © Bundesamt fuer Seeschifffahrt und Hydrographie, Hamburg, Germany, * National 
Institute of Oceanography and Applied Geophysics, Sgonico, Haly, ® Instituto Espahol de Oceanografia, Canary Islands, 
Spain, 9 Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan, © Tokyo University of 
Marine Science and Technology, Tokyo, Japan. © The University of Tokyo, Tokyo, Japan 
*Correspondence: 
Annie PS. Wong 
30sWw.uW@gmail.com 
Specialty section: 
This article was submitted to 
Ocean Observation, 
a sectHon of the journal 
rontiers in Marine Science 
Received: 01 June 2020 
Accepted: 37 July 2020 
Published: 15 September 2020 
-rontiers in Marine Science | www.frontiersin.oru 
September 2020 | Volume 7 | Article 701