Oceanography The Official Magazine of
The Oceanography Society
Volume 32 Issue 02

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Volume 32, No. 2
Pages 122 - 133

Comparing Air-Sea Flux Measurements from a New Unmanned Surface Vehicle and Proven Platforms During the SPURS-2 Field Campaign

Dongxiao Zhang Meghan F. CroninChristian MeinigJ. Thomas FarrarRichard JenkinsDavid PeacockJennifer KeeneAdrienne SuttonQiong Yang
Article Abstract

Two saildrones participated in the Salinity Processes in the Upper-ocean Regional Study 2 (SPURS-2) field campaign at 10°N, 125°W, as part of their more than six-month Tropical Pacific Observing System (TPOS)-2020 pilot study in the eastern tropical Pacific. The two saildrones were launched from San Francisco, California, on September 1, 2017, and arrived at the SPURS-2 region on October 15, one week before R/V Revelle. Upon arrival at the SPURS-2 site, they each began a two-week repeat pattern, sailing around the program’s central moored surface buoy. The heavily instrumented Woods Hole Oceanographic Institution (WHOI) SPURS-2 buoy serves as a benchmark for validating the saildrone measurements for air-sea fluxes. The data collected by the WHOI buoy and the saildrones were found to be in reasonably good agreement. Although of short duration, these ship-saildrone-buoy comparisons are encouraging as they provide enhanced understanding of measurements by various platforms in a rapidly changing subsynoptic weather system. The saildrones were generally able to navigate the challenging Intertropical Convergence Zone, where winds are low and currents can be strong, demonstrating that the saildrone is an effective platform for observing a wide range of oceanographic variables important to air-sea interaction studies.

Citation

Zhang, D., M.F. Cronin, C. Meinig, J.T. Farrar, R. Jenkins, D. Peacock, J. Keene, A. Sutton, and Q. Yang. 2019. Comparing air-sea flux measurements from a new unmanned surface vehicle and proven platforms during the SPURS-2 field campaign. Oceanography 32(2):122–133, https://doi.org/10.5670/oceanog.2019.220.

References

Badosa, J., J. Wood, P. Blanc, C.N. Long, L. Vuilleumier, D. Demengel, and M. Haeffelin. 2014. Solar irradiances measured using SPN1 radiometers: Uncertainties and clues for development. Atmospheric Measurement Techniques 7:4,267–4,283, https://doi.org/10.5194/amt-7-4267-2014.

Bigorre, S.P., R.A. Weller, J.B. Edson, and J.D. Ware. 2013. A surface mooring for air-sea interaction research in the Gulf Stream: Part II. Analysis of the observations and their accuracies. Journal of Atmospheric and Oceanic Technology 30:450–469, https://doi.org/10.1175/JTECH-D-12-00078.1.

Cokelet, E.D., R. Jenkins, C. Meinig, N. Lawrence-Slavas, C.W. Mordy, P.J. Stabeno, H. Tabisola, and J.N. Cross. 2015. The use of saildrones to examine spring conditions in the Bering Sea: Instrument comparisons, sea ice meltwater and Yukon River plume studies. Paper presented at Oceans’15 MTS/IEEE, Marine Technology Society and Institute of Electrical and Electronics Engineers, October 19–22, 2015, Washington, DC.

Colbo, K., and R.A. Weller. 2009. The accuracy of the IMET sensor package in the subtropics. Journal of Atmospheric and Oceanic Technology 9:1,867–1,890, https://doi.org/​10.1175/2009JTECHO667.1.

Cravatte, S., W.S. Kessler, N. Smith, S. Wijffels, K. Ando, M. Cronin, T. Farrar, E. Guilyardi, A. Kumar, T. Lee, and others. 2016. TPOS 2020 Project: First Report. GOOS-215, TPOS 2020, 200 pp., http://tpos2020.org/first-report/.

Cronin, M.F., C.W. Fairall, and M.J. McPhaden. 2006. An assessment of buoy-derived and numerical weather prediction surface heat fluxes in the tropical Pacific. Journal of Geophysical Research 111, C06038, https://doi.org/10.1029/2005JC003324.

Cronin, M.F., N.A. Pelland, S.R. Emerson, and W.R. Crawford. 2015. Estimating diffusivity from the mixed layer heat and salt balances in the North Pacific. Journal of Geophysical Research 120(11):7,346–7,362, https://doi.org/​10.1002/2015JC011010.

Emond, M., D. Vandemark, J. Forsythe, A.J. Plueddemann, and J.T. Farrar. 2012. Flow Distortion Investigation of Wind Velocity Perturbations for Two Ocean Meteorological Platforms. Woods Hole Oceanographic Institution Technical Report, WHOI-2012-02, 66 pp.

Edson, J.B., V. Jampana, R.A. Weller, S.P. Bigorre, A.J. Plueddemann, and C.W. Fairall. 2013. On the exchange of momentum over the open ocean. Journal of Physical Oceanography 43(8):1,589–1,610, https://doi.org/​10.1175/JPO-D-12-0173.1.

Fairall, C.W., E.F. Bradley, J.E. Hare, A.A. Grachev, and J.B. Edson. 2003. Bulk parameterization of air-sea fluxes: Updates and verification for the COARE algorithm. Journal of Climate 16(4):571–591, https://doi.org/10.1175/1520-0442(2003)016​<0571:​BPOASF>2.0.CO;2.

Farrar, J.T., and A.J. Plueddemann. 2019. On the factors driving upper-ocean salinity variability at the western edge of the Eastern Pacific Fresh Pool. Oceanography 32(2):30–39, https://doi.org/​10.5670/oceanog.2019.209.

Lindstrom, E., J. Gunn, A. Fischer, A. McCurdy, and L.K. Glover. 2012. A Framework for Ocean Observing. Task Team for an Integrated Framework for Sustained Ocean Observing. Paris, France, UNESCO, IOC/INF-1284, 25 pp., https://doi.org/​10.5270/OceanObs09-FOO.

Long, C.N., A. Bucholtz, H. Jonsson, B. Schmid, A.M. Vogelmann, and J. Wood. 2010. A method of correcting for tilt from horizontal in downwelling shortwave irradiance measurements on moving platforms. The Open Atmospheric Science Journal 4:78–87, https://doi.org/​10.2174/​1874282301004010078.

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 (TOGA) observing system: A decade of progress. Journal of Geophysical Research 103:14,169–14,240, https://doi.org/​10.1029/97JC02906.

Meinig, C., R. Jenkins, N. Lawrence-Slavas, and H. Tabisola. 2015. The use of saildrones to examine spring conditions in the Bering Sea: Vehicle specification and mission performance. Paper presented at Oceans’15 MTS/IEEE, Marine Technology Society and Institute of Electrical and Electronics Engineers, October 19–22, 2015, Washington, DC.

Meinig, C., E.F. Burger, N. Cohen, E.D. Cokelet, M.F. Cronin, J.N. Cross, S. De Halleux, R. Jenkins, A.T Jessup, C.W. Mordy, and others. In press. Public private partnerships to advance regional ocean observing capabilities: A saildrone and NOAA-PMEL case study and future considerations to expand to global scale observing. Review Article for Oceanobs19: An Ocean of Opportunity. Frontiers in Marine Science.

Send, U., R. Weller, D. Wallace, F. Chavez, R. Lampitt, T. Dickey, M. Honda, K. Nittis, R. Lukas, M. McPhaden, and R. Feely. 2010. “OceanSITES” in Proceedings of OceanObs’09: Sustained Ocean Observations and Information for Society (Vol. 2). Venice, Italy, September 21–25, 2009, J. Hall, D.E. Harrison, and D. Stammer, eds, ESA Publication WPP-306, https://doi.org/10.5270/OceanObs09.cwp.79.

Sutton, A.J., C.L. Sabine, S. Maenner-Jones, N. Lawrence-Slavas, C. Meinig, R.A. Feely, J.T. Mathis, S. Musielewicz, R. Bott, P.D. McLain, and others. 2014. A high-frequency atmospheric and seawater pCO2 data set from 14 open-ocean sites using a moored autonomous system. Earth System Science Data 6:353–366, https://doi.org/10.5194/essd-6-353-2014.

Zhang, D., M.F. Cronin, X. Lin, R. Inoue, A. Fassbender, S. Bishop, and A. Sutton. 2017. Observing air-sea interaction in the western boundary currents and their extension regions: Considerations for OceanObs’19. US CLIVAR Variations 15(4):23–30.