Oceanography The Official Magazine of
The Oceanography Society
Volume 30 Issue 02

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Volume 30, No. 2
Pages 38 - 48


Autonomous Multi-Platform Observations During the Salinity Processes in the Upper-ocean Regional Study

By Eric J. Lindstrom , Andrey Y. Shcherbina, Luc Rainville, J. Thomas Farrar, Luca R. Centurioni, Shenfu Dong , Eric A. D’Asaro , Charles Eriksen, David M. Fratantoni, Benjamin A. Hodges, Verena Hormann, William S. Kessler, Craig M. Lee, Stephen C. Riser , Louis St. Laurent, and Denis L. Volkov  
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Article Abstract

The Salinity Processes in the Upper-ocean Regional Study (SPURS) aims to understand the patterns and variability of sea surface salinity. In order to capture the wide range of spatial and temporal scales associated with processes controlling salinity in the upper ocean, research vessels delivered autonomous instruments to remote sites, one in the North Atlantic and one in the Eastern Pacific. Instruments sampled for one complete annual cycle at each of these two sites, which are subject to contrasting atmospheric forcing. The SPURS field programs coordinated sampling from many different platforms, using a mix of Lagrangian and Eulerian approaches. This article discusses the motivations, implementation, and first results of the SPURS-1 and SPURS-2 programs.


Lindstrom, E.J., A.Y. Shcherbina, L. Rainville, J.T. Farrar, L.R. Centurioni, S. Dong, E.A. D’Asaro, C. Eriksen, D.M. Fratantoni, B.A. Hodges, V. Hormann, W.S. Kessler, C.M. Lee, S.C. Riser, L. St. Laurent, and D.L. Volkov. 2017. Autonomous multi-platform observations during the Salinity Processes in the Upper-ocean Regional Study. Oceanography 30(2):38–48, https://doi.org/10.5670/oceanog.2017.218.

Supplementary Materials

An animation of the evolution of the SPURS-2 Lagrangian observing system can be found online at https://youtu.be/nYScDvmsyHQ.


Alory, G., C. Maes, T. Delcroix, N. Reul, and S. Illig. 2012. Seasonal dynamics of sea surface salinity off Panama: The far eastern Pacific fresh pool. Journal of Geophysical Research 117, C04028, https://doi.org/​10.1029/2011JC007802.

Anderson, J., and S. Riser. 2014. Near-surface variability of temperature and salinity in the tropical and subtropical ocean: Observations from profiling floats. Journal of Geophysical Research 119:7,433–7,448, https://doi.org/​10.1002/2014JC010112.

Anderson, S.P., A. Hinton, and R.A. Weller. 1998. Moored observations of precipitation temperature. Journal of Atmospheric and Oceanic Technology 15:979–986, https://doi.org/10.1175/​1520-0426(1998)015<0979:MOOPT>2.0.CO;2.

Bell, M., M. Lefebvre, P. Le Traon, N. Smith, and K. Wilmer-Becker. 2009. GODAE: The Global Ocean Data Assimilation Experiment. Oceanography 22(3):14–21, https://doi.org/10.5670/oceanog.2009.62.

Bogdanoff, A.S. 2017. Physics of Diurnal Warm Layers: Turbulence, Internal Waves, and Lateral Mixing. PhD thesis. Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, Cambridge, MA.

Busecke, J., R.P. Abernathey, and A.L. Gordon. 2017. Lateral eddy mixing in the subtropical salinity maxima of the global ocean. Journal of Physical Oceanography 47:737–754, https://doi.org/10.1175/JPO-D-16-0215.1.

Centurioni, L., L. Braasch, E. Di Lauro, P. Contestabile, F. De Leo, R. Casotti, L. Franco, and D. Vicinanza. 2017. A new strategic wave measurement station off Naples port main breakwater. Coastal Engineering Proceedings 1(35):36, https://doi.org/​10.9753/icce.v35.waves.36.

Centurioni, L., A. Horányi, C. Cardinali, E. Charpentier, and R. Lumpkin. 2016. A global ocean observing system for measuring sea level atmospheric pressure: Effects and impacts on numerical weather prediction. Bulletin of the American Meteorological Society 98(2):231–238, https://doi.org/10.1175/BAMS-D-15-00080.1.

Centurioni, L.R., V. Hormann, Y. Chao, R. Reverdin, J. Font, and D.-K. Lee. 2015. Sea surface salinity observations with Lagrangian drifters in the tropical North Atlantic during SPURS: Circulation, fluxes, and comparisons with remotely sensed salinity from Aquarius. Oceanography 28(1):96–105, https://doi.org/​10.5670/oceanog.2015.08.

Coale, K.H., K.S. Johnson, S.E. Fitzwater, S.P.G. Blain, T.P. Stanton, and T.L. Coley. 1998. IronEx-I, an in situ iron-enrichment experiment: Experimental design, implementation and results. Deep Sea Research Part II 45(6):919–945, https://doi.org/10.1016/S0967-0645(98)00019-8.

D’Asaro, E.A. 2003. Performance of autonomous Lagrangian floats. Journal of Atmospheric and Oceanic Technology 20:896–911, https://doi.org/​10.1175/1520-0426(2003)020<0896:POALF>​2.0.CO;2.

D’Asaro, E., C. Lee, L. Rainville, R. Harcourt, and L. Thomas. 2011. Enhanced turbulence and energy dissipation at ocean fronts. Science 332:318–321, https://doi.org/10.1126/science.1201515.

Dong, S., D.L. Volkov, G. Goni, R. Lumpkin, and G. Foltz. 2017. Near-surface salinity and temperature structure observed with dual-​sensor drifters in the subtropical South Pacific. Journal of Geophysical Research 122, https://doi.org/​10.1002/2017JC012894.

Durack, P.J., and S.E. Wijffels. 2010. Fifty-year trends in global ocean salinities and their relationship to broad-scale warming. Journal of Climate 23:4,342–4,362, https://doi.org/​10.1175/2010JCLI3377.1.

Farrar, J.T., L. Rainville, A.J. Plueddemann, W.S. Kessler, C. Lee, B.A. Hodges, R.W. Schmitt, J.B. Edson, S.C. Riser, C.C. Eriksen, and D.M. Fratantoni. 2015. Salinity and temperature balances at the SPURS central mooring during fall and winter. Oceanography 28(1):56–65, https://doi.org/​10.5670/oceanog.2015.06.

Farrar, J.T., and R.A. Weller. 2006. Intraseasonal variability near 10°N in the eastern tropical Pacific Ocean. Journal of Geophysical Research 111, C05015, https://doi.org/10.1029/2005JC002989.

Font, J., J. Boutin, N. Reul, P. Spurgeon, J. Ballabrera-Poy, A. Chuprin, C. Gabarró, J. Gourrion, S. Guimbard, C. Hénocq, and others. 2013. SMOS first data analysis for sea surface salinity determination. International Journal of Remote Sensing 34:3,654–3,670, https://doi.org/10.1080/​01431161.2012.716541.

Guimbard, S., N. Reul, B. Chapron, M. Umbert, and C. Maes. 2017. Seasonal and interannual variability of the Eastern Tropical Pacific Fresh Pool. Journal of Geophysical Research 122:1,749–1,771, https://doi.org/10.1002/2016JC012130.

Horányi, A., C. Cardinali, and L. Centurioni, 2017. The global numerical weather prediction impact of mean-sea-level pressure observations from drifting buoys. Quarterly Journal of the Royal Meteorological Society 143(703):974–985, https://doi.org/10.1002/qj.2981.

Hodges, B.A., and D.M. Fratantoni. 2014. AUV observations of the diurnal surface layer in the North Atlantic salinity maximum. Journal of Physical Oceanography 44:1,595–1,604.

Hormann, V., L.R. Centurioni, A. Mahadevan, S. Essink, E.A. D’Asaro, and B.P. Kumar. 2016. Variability of near-surface circulation and sea surface salinity from Lagrangian drifters in the Bay of Bengal during the waning 2015 southwest monsoon. Oceanography 29(2):124–133, https://doi.org/​10.5670/oceanog.2016.45.

Hormann, V., L.R. Centurioni, and G. Reverdin. 2015. Evaluation of drifter salinities in the subtropical North Atlantic. Journal of Atmospheric and Oceanic Technology 32:185–192, https://doi.org/10.1175/JTECH-D-14-00179.1.

Jayne, S.R., D. Roemmich, N. Zilberman, S.C. Riser, K.S. Johnson, G.C. Johnson, and S.R. Piotrowicz. 2017. The Argo Program: Present and future. Oceanography 30(2):18–28, https://doi.org/​10.5670/oceanog.2017.213.

Kedem, B., R. Pfeiffer, and D.A. Short. 1997. Variability of space-time mean rain rate. Journal of Applied Meteorology 36:443–451, https://doi.org/10.1175/​1520-0450(1997)036<0443:VOSTMR>2.0.CO;2.

Kudryavtsev, V.N., and A.V. Soloviev. 1990. Slippery near-surface layer of the ocean arising due to daytime solar heating. Journal of Physical Oceanography 20:617–628, https://doi.org/10.1175/​1520-0485(1990)020<0617:SNSLOT>2.0.CO;2.

Lagerloef, G., F. Wentz, S. Yueh, H.-Y. Kao, G.C. Johnson, and J.M. Lyman. 2012. Aquarius satellite mission provides new, detailed view of sea surface salinity. State of the Climate in 2011, Bulletin of the American Meteorological Society 93(7):S70–S71.

Lindstrom, E., F. Bryan, and R. Schmitt. 2015. SPURS: Salinity Processes in the Upper-ocean Regional Study—The North Atlantic Experiment. Oceanography 28(1):14–19, https://doi.org/10.5670/oceanog.2015.01.

Mahadevan, A., E. D’Asaro, C. Lee, and M.J. Perry. 2012. Eddy-driven stratification initiates North Atlantic spring phytoplankton blooms. Science 337:54–58, https://doi.org/10.1126/science.1218740.

Marshall, J., R. Ferrari, G. Forget, A. Andersson, N. Bates, W. Dewar, S. Doney, D. Fratanoni, T. Joyce, F. Straneo, and others. 2009. The Climode field campaign: Observing the cycle of convection and restratification over the Gulf Stream. Bulletin of the American Meteorological Society 90:1,337–1,350, https://doi.org/10.1175/​2009BAMS2706.1.

McPhaden, M.J., A.J. Busalacchi, R. Cheney, J.-R. Donguy, K.S. Gage, D. Halpern, M. Ji, P. Julian, G. Meyers, G.T. Mitchum, and others. 1998. The Tropical Ocean-Global Atmosphere observing system: A decade of progress. Journal of Geophysical Research 103(C7):14,169–14,240, https://doi.org/​10.1029/97JC02906.

Meissner, T., and F. Wentz. 2016. RSS SMAP Salinity: Version 2 Validated Release. Release Notes, Algorithm Theoretical Basis Document (ATBD), Validation, Data Format Specification, RSS Technical Report 091316, http://images.remss.com/papers/rsstech/2016_Meissner_SMAP_SSS_Release_V2.pdf.

NASA Strategic Plan. 2014. https://www.nasa.gov/sites/default/files/files/FY2014_NASA_SP_​508c.pdf.

Niiler, P.P., A. Sybrandy, K. Bi, P.M. Poulain, and D. Bitterman. 1995. Measurements of the water-​following capability of holey-sock and TRISTAR drifters. Deep Sea Research Part I 42:1,951–1,964, https://doi.org/10.1016/0967-0637(95)00076-3.

Nystuen, J.A. 2001. Listening to raindrops from underwater: An acoustic disdrometer. Journal of Atmospheric and Oceanic Technology 18:1,640–1,657, https://doi.org/10.1175/​1520-0426​(2001)018<1640:LTRFUA>2.0.CO;2.

Osse, J., S. Stalin, C. Meinig, and H. Milburn. 2015. The PRAWLER, a vertical profiler: Powered by wave energy. In Oceans 2015 MTS/IEEE. Marine Technology Society and Institute of Electrical and Electronic Engineers, Washington, DC, October 19–22, 2015.

Pinkel, R., M.A. Goldin, J.A. Smith, O.M. Sun, A.A. Aja, M.N. Bui, and T. Hughen. 2011. The Wirewalker: A vertically profiling instrument carrier powered by ocean waves. Journal of Atmospheric and Oceanic Technology 28:426–435, https://doi.org/​10.1175/2010JTECHO805.1.

Rainville, L., J.I. Gobat, C.M. Lee, and G.B. Shilling. 2017. Multi-month dissipation estimates using microstructure from autonomous underwater gliders. Oceanography 30(2):49–50, https://doi.org/​10.5670/oceanog.2017.219.

Riser, S., J. Anderson, A. Shcherbina, and E. D’Asaro, 2015. Variability in near-surface salinity from hours to decades in the eastern North Atlantic: The SPURS region. Oceanography 28(1):66–77, https://doi.org/10.5670/oceanog.2015.11.

Riser, S.C., H.J. Freeland, D. Roemmich, S. Wijffels, A. Troisi, M. Belbéoch, D. Gilbert, J. Xu, S. Pouliquen, A. Thresher, and others. 2016. Fifteen years of ocean observations with the global Argo array. Nature Climate Change 6:145–153, https://doi.org/10.1038/NCLIMATE2872.

Servain J., A. Busalacchi, M.J. McPhaden, A.D. Moura, G. Reverdin, M. Vianna, and S. Zebiak. 1998. A Pilot Research Moored Array in the Tropical Atlantic (PIRATA). Bulletin of the American Meteorological Society 79:2,019–2,031, https://doi.org/10.1175/1520-0477(1998)079<2019:APRMAI>2.0.CO;2.

Shcherbina, A., E. D’Asaro, S. Riser, and W. Kessler. 2015a. Variability and interleaving of upper-ocean water masses surrounding the North Atlantic Salinity Maximum. Oceanography 28(1):106–113, https://doi.org/10.5670/oceanog.2015.12.

Shcherbina, A.Y., M.A. Sundermeyer, E. Kunze, E. D’Asaro, G. Badin, D. Birch, A.E. Brunner-Suzuki, J. Callies, B.T. Kuebel Cervantes, M. Claret, and others. 2015b. The LatMix summer campaign: Submesoscale stirring in the upper ocean. Bulletin of the American Meteorological Society 96:1,257–1,279, https://doi.org/10.1175/BAMS-D-14-00015.1.

St. Laurent, L., and S. Merrifield. 2017. Measurements of near-surface turbulence and mixing from autonomous ocean gliders. Oceanography 30(2):116–125, https://doi.org/10.5670/oceanog.2017.231.

Trask, R., and J.T. Farrar. In press. Near real time data recovery from oceanographic moorings. In Observing the Oceans in Real Time. R. Venkatesan, A. Tandon, E. D’Asaro, and M.A. Atmanand, eds, Springer.

Yang, J., S. Riser, J. Nystuen, W. Asher, and A. Jessup. 2015. Regional rainfall measurements using the Passive Aquatic Listener during the SPURS field campaign. Oceanography 28(1):124–133, https://doi.org/10.5670/oceanog.2015.10.

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