Sarah Gille
Project
Assimilation and Interpretation of High-Wavenumber Variability in the Ocean for SWOT
Co-Investigators
Bruce Cornuelle, Matthew Mazloff
Recent SWOT-related Publications | See All
Global Observations of Fine-Scale Ocean Surface Topography with the Surface Water and Ocean Topography (SWOT) Mission (2019)
Characterization of the Deep-Water Surface Wave Variability in the California Current Region (2017)
Small-Scale Open-Ocean Currents Have Large Effects on Wind-Wave Heights (2017)
Seasonality of Submesoscale Dynamics in the Kuroshio Extension (2016)

Meeting Presentations (25)

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Small Scale Variability of Sea State and Currents: Observations, Models, Theory... [presentation]
Villas Boas, B., Maréchal, G., Brumer, S., Gressani, V., Ardhuin, F., Rascle, N., Chapron, B., Quilfen, Y., Delouis, J.-M., Gille, S., Cornuelle, B., Mazloff, M., Peureux, C., and Dodet, G. (20-Jun-19)
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Reconstruction of 2D an 3D Ocean Circulation from SWOT: Advances of the 2016-2019 Science Team, and Remaining Issues [presentation]
Cosme, E., Gille, S., Le Traon, P.-Y., and Qiu, B. (18-Jun-19)
Presentation not available
High-frequency and High-wavenumber Variability in the California Current: Evaluating Model Requirements for SWOT Assimilation [presentation]
Gille, S., Mazloff, M., Wang, J., Chereskin, T., Cornuelle, B., Menemenlis, D., Passaro, M., and Rocha, C. (18-Jun-19)
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The Transition from Balanced Motions to Internal Waves: Using ADCP Data to Guide Understanding [presentation]
Gille, S., Chereskin, T., and Soares, S. (18-Jun-19)
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Diagnosing Tidal Modulation from High Frequency Radar [presentation]
Kachelein, L., Cornuelle, B., Gille, S., Mazloff, and M., Terrill, E. (27-Jun-18)
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High-Wavenumber Spectra from Historical ADCP Transits in the Tropical Pacific [presentation]
Gille, S., Soares, S., Chereskin, T., Hummon, J., Firing, E., Masich, J., Passaro, M., and Rocha, C. (27-Jun-18)
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Progress Toward Variational Assimilation of SWOT Data [presentation]
Cornuelle, B., Gille, S., Fu, L-L., Gopalakrishnan, G., Heimbach, P., Kachelein, L., Li, Z., Mazloff, M., Peralta, H.V., Verdy, A., Villas Boas, B., and Wang, J. (27-Jun-18)
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Small-Scale Correlated Waves and Currents [presentation]
Ardhuin, F., Chapron, B., Rascle, N., Molemaker, J., Gille, S., Menemenlis, D., Gula, J., and Rocha, C. (28-Jun-17)
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ADCP Wavenumber Spectra in the California Current [presentation]
Gille, S., Chereskin, T., Rocha, C., and Menemenlis, D. (27-Jun-17)
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Laying the Groundwork for SWOT Assimilation in the MITcgm [presentation]
Gille, S., Callies, J., Cornuelle, B., Ferrari, R., Heimbach, P., Mazloff, M., Peralta, H.V., Boas, B.V., and Wunsch, C. (27-Jun-17)
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Sea Surface Height Slope Computation [presentation]
Gille, S., Dibarboure, G., and Sandwell, D. (26-Jun-17)
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Priorities for Potential Sites for the Four HR Coastal/Ocean/Sea-Ice 120 km2 Zones in Nominal Phase [presentation]
Morrow, R., Gille, S., and Steunou, N. (26-Jun-17)
Poster
Global Surface Density Variability on Scales Relevant to SWOT [poster]
Drushka, K., Gille, S.T., Sprintall, J., Johnson, L., and Hoang, C.C. (13-Dec-16). In the present study, we exploit historical surface density observations from shipboard thermosalinographs (TSGs), which make continuous underway measurements of temperature and salinity at ~5 m depth. Though TSG measurements represent variations in the mixed layer rather than the column-integrated dynamic height variations that SWOT will sample, they nonetheless provide valuable information about where and when the ocean is energetic on the scales measured by SWOT.
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LR L2 Products: Description and Open Points [presentation]
Steunou, N., Gille, S., Dibarboure, G., Farrar, T., and Morrow, R. (15-Jun-16)
Poster
Assimilation and Interpretation of High-Wavenumber Variability in the Ocean for SWOT [poster]
Gille, S., Bôas, B., Cornuelle, B., and Mazloff, M. (14-Jun-16)
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Techniques for Reconstruction & Assimilation of SWOT Ocean Observations [presentation]
Gille, S. (14-Jun-16)
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Ocean Data Products Splinter Summary [presentation]
Gille, S., Steunou, N., Farrar, T., and Dibarboure, G. (09-Jul-15)
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Ocean LR Data Product [presentation]
Steunou, N., Gille, S., Farrar, T., and Dibarboure, G. (08-Jul-15)
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Discussion of SWOT Ocean Expert Data Product [presentation]
Farrar, T., Dibarboure, G., Steunou, N., Gille, S., Callahan, P., Rodriguez, E., Morrow, R., and Fu, L-L. (08-Jul-15)
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Proposed Modifications to Science Requirements Regarding Ocean Data Products [presentation]
Farrar, T., Dibarboure, G., Gille, S., Steunou, N., Morrow, R., Fu, L-L., and Rodriguez, E. (08-Jul-15)
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KaRIn Geometry and the Nine Synthetic Aperture Radar (SAR) Beams [presentation]
Dibarboure, G., Morrow, R., Steunou, N., Picot, N., Fjørtoft, R., Soulat, F., Dubois, P., Gille, S., and Farrar, T. (07-Jul-15)
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Onboard Processor [presentation]
Dibarboure, G., Farrar, T., Gille, S., and Morrow, R. (14-Jan-15)
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Ocean Data Products [presentation]
Steunou, N., Gille, S., Callahan, P., and Picot, N. (14-Jan-15)
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4D-Var State Estimation for Maximum Information Return from SWOT Observations in the California Current System and the Southern Ocean [presentation]
Gille, S., Cornuelle, B., and Mazloff, M. (28-Jan-13)
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Currents/Mixing/Southern Ocean [presentation]
Gille, S. (28-Apr-08)

Publications (6)

Morrow, R., Fu, L-L., Ardhuin, F., Benkiran, M., Chapron, B., Cosme, E., d'Ovidio, F., Farrar, J.T., Gille, S.T., Lapeyre, G., Le Traon, P-Y., Pascual, A., Ponte, A., Qiu, B., Rascle, N., Ubelmann, C., Wang, J., and Zaron, E.D. (2019). Global Observations of Fine-Scale Ocean Surface Topography with the Surface Water and Ocean Topography (SWOT) Mission, Front. Mar. Sci., 6, doi: 10.3389/fmars.2019.00232.
Villas Bôas, B., Gille, S.T., Mazloff, M.R., and Cornuelle, B.D. (2017). Characterization of the Deep-Water Surface Wave Variability in the California Current Region, J. Geophys. Res-Oceans, 122(11), 8753-8769, doi: 10.1002/2017JC013280.
Ardhuin, F., Gille, S., Menemenlis, D., Rocha, C.B., Rascale, N., Chapron, B., Gula, J., and Molemaker, J. (2017). Small-Scale Open-Ocean Currents Have Large Effects on Wind-Wave Heights, J. Geophys. Res. Accepted, doi: 10.1002/2016JC012413.
Rocha, C., Gille, S.T., Chereskin, T.K., and Menemenlis, D. (2016). Seasonality of Submesoscale Dynamics in the Kuroshio Extension, Geophys. Res. Lett., 43(11), 304-311, doi: 10.1002/2016GL071349.
Rocha, C., Chereskin, T.K., Gille, S.T., and Menemenlis, D. (2016). Mesoscale to Submesoscale Wavenumber Spectra in Drake Passage, J. Phys. Oceanogr., 46, 601-620, doi: 10.1175/JPO-D-15-0087.1.
Mazloff, M.R., Gille, S.T., and Cornuelle, B.D. (2014). Improving the Geoid: Combining Altimetry and Mean Dynamic Topography in the California Coastal Ocean, Geophys. Res. Lett., 41, 8944-8952, doi: 10.1002/2014GL062402.

Documents (3)

Assimilation and Interpretation of High-Wavenumber Variability in the Ocean for SWOT
PI: Sarah Gille (07-Jun-17). The objective of our research in support of SWOT is to develop 4-dimensional variational assimilation (4d-var) methods that include both quasi-geostrophic and tidal motions in order to build the capabilities to map, evaluate, and interpret SWOT observations, with a specific focus on the California Current region, which has been identified as one of the target regions for calibration and validation of SWOT (Wang et al., 2016). Our aim is to distinguish balanced, geostrophic motions from the myriad other processes that influence SSH variability at the ocean surface.
Coastal and Estuaries Part 2 - Coastal Seas and Shelf Processes
Ayoub N., Birol, F., Brown, S.T., Chao, Y., Cornuelle, B., De Mey, P., Estournel, C., Giddings, S., Gille, S., Kurapov, A., Lyard, F., Mazloff, M., Strub, T., and Turki, I. (15-Mar-17). The SWOT Mission Science Document was published in 2012 and the general overview sections were written in 2011. The Science Document contains a section on coastal seas and shelf processes that provides a good general overview. This white paper is aimed at providing an updated perspective on SWOT science and applications for coastal seas and shelves. A separate white paper (Coastal and Estuaries White Paper, Part 1: Estuaries and Nearshore Processes) describes SWOT applications in estuaries and near-shore regions (where dynamics are strongly influenced by breaking waves).
Issues and SWOT Contribution in the Coastal Zones and Estuaries Part 1
Laignel, B., Ayoub, N., Birol, F., Brown, S., Chao, Y., Cornuelle, B., Costa, S., De Mey, P., Estournel, C., Feddersen, F., Giddings, S., Gille, S., Kurapov, A., Lyard, F., Morrow, R., Simard, M., Strub, T., and Turki, I. (15-Mar-17). This white paper describes SWOT applications in estuaries and near-shore regions where dynamics are strongly influenced by breaking waves.