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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Artificial satellites in earth sciences. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (509 pages)
    Edition: 1st ed.
    ISBN: 9780080516585
    Series Statement: Issn Series ; v.Volume 69
    DDC: 551.46/0028
    Language: English
    Note: Cover -- Contents -- Contributors -- Preface -- Chapter 1. Satellite Altimetry -- 1. Introduction -- 2. Radar Measurement Principles -- 3. Range Estimation -- 4. Precision Orbit Determination -- 5. Geophysical Effects on the Sea Surface Topography -- 6. Significant Wave Height Estimation -- 7. Wind-Speed Estimation -- 8. TOPEX/POSEIDON Mission Design and Performance -- 9. Outlook for Future Altimeter Missions -- Acknowledgments -- References -- Chapter 2. Large-Scale Ocean Circulation -- 1. Introduction -- 2. The Ocean General Circulation -- 3. The Temporal Variability -- 4. Conclusions -- Acknowledgments -- References -- Chapter 3. Ocean Currents and Eddies -- 1. Introduction -- 2. Altimeter Data Processing for Mesoscale Studies -- 3. Ocean Currents -- 4. Mesoscale Eddies -- 5. Conclusions -- Acknowledgments -- References -- Chapter 4. Tropical Ocean Variability -- 1. Introduction -- 2. Tropical Pacific -- 3. Indian Ocean -- 4. Tropical Atlantic -- 5. Conclusion -- Acknowledgments -- References -- Chapter 5. Data Assimilation by Models -- 1. Introduction -- 2. Examples and Merits of Data Assimilation -- 3. Data Assimilation as an Inverse Problem -- 4. Assimilation Methodologies -- 5. Practical Issues of Assimilation -- 6. Summary and Outlook -- Acknowledgments -- References -- Chapter 6. Ocean Tides -- 1. Introduction -- 2. Mathematical Representation of Ocean Tides -- 3. Status Before High-Precision Satellite Altimetry -- 4. Methodologies for Extracting Ocean Tides from Altimetry -- 5. The Semi-Diurnal and Diurnal Tides over the Deep Ocean -- 6. The Long Period Ocean Tides -- 7. Internal Tides -- 8. The Tides over Shallow Waters -- 9. Tidal Energetics and Satellite Altimetry -- 10. Applications -- 11. Conclusions -- Acknowledgments -- References -- Chapter 7. Ocean Surface Waves -- 1. Introduction -- 2. Wave Modeling and Altimetry. , 3. Wave Climate Studies with Altimeter Data -- 4. Conclusions -- 5. Glossary -- Acknowledgments -- References -- Chapter 8. Sea Level Change -- 1. Introduction -- 2. The Tide Gauge Record and its Limitations -- 3. Satellite Altimeter Measurements of Sea-Level Change -- 4. Calibration of Satellite Altimeter Measurements Using Tide Gauge Data -- 5. Detecting Changes in the Rate of Sea-Level Rise -- 6. Global Mean Changes in Sea Level, Sea-Surface Temperature, and Precipitable Water -- 7. Spatial Variations of Sea-Level Change and Sea-Surface Temperature -- 8. Linking Together Different Satellite Altimeter Missions -- 9. Conclusions -- Acknowledgments -- References -- Chapter 9. Ice Sheet Dynamics and Mass Balance -- 1. Introduction -- 2. Radar Altimeter Measurement of Ice Sheet Surface Elevations -- 3. Greenland and Antarctica Ice Sheet Topography -- 4. Ice Surface Slopes and Driving Stresses -- 5. Measurement of Ice Margins -- 6. Surface Elevation Changes and Mass Balance -- Acknowledgments -- References -- Chapter 10. Applications to Geodesy -- 1. Introduction -- 2. Mean Sea Surface Mapping -- 3. Gravity Recovery -- 4. New Frontiers -- 5. Concluding Remarks -- Acknowledgments -- References -- Chapter 11. Applications to Marine Geophysics -- 1. Introduction -- 2. Filtering the Long-Wavelength Geoid Signal -- 3. Geoid Anomalies and Isostatic Compensation -- 4. Mechanical Behavior of Oceanic Plates: Flexure under Seamount Loading -- 5. Thermal Evolution of the Oceanic Lithosphere -- 6. Oceanic Hotspot Swells -- 7. Short and Medium Wavelength Lineations in the Marine Geoid -- 8. Mapping the Seafloor Tectonic Fabric -- 9. Conclusions -- Acknowledgments -- References -- Chapter 12. Bathymetric Estimation -- 1. Introduction -- 2. Gravity Anomaly and Sea Surface Slopes -- 3. Limitations of Radar Alitmetry for Gravity Field Recovery -- 4. Forward Models. , 5. Inverse Approaches -- 6. Data Availability and Case Study: Bathymetric Estimation -- 7. Prospects for the Future -- 8. Appendix: Interaction of the Radar Pulse with the Rough Ocean Surface -- References -- Index -- Color Plate Section.
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  • 2
    Publication Date: 2022-05-25
    Description: Author Posting. © American Meteorological Society, 2018. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 35 (2018): 281-297, doi:10.1175/JTECH-D-17-0076.1.
    Description: The wavenumber spectrum of sea surface height (SSH) is an important indicator of the dynamics of the ocean interior. While the SSH wavenumber spectrum has been well studied at mesoscale wavelengths and longer, using both in situ oceanographic measurements and satellite altimetry, it remains largely unknown for wavelengths less than ~70 km. The Surface Water Ocean Topography (SWOT) satellite mission aims to resolve the SSH wavenumber spectrum at 15–150-km wavelengths, which is specified as one of the mission requirements. The mission calibration and validation (CalVal) requires the ground truth of a synoptic SSH field to resolve the targeted wavelengths, but no existing observational network is able to fulfill the task. A high-resolution global ocean simulation is used to conduct an observing system simulation experiment (OSSE) to identify the suitable oceanographic in situ measurements for SWOT SSH CalVal. After fixing 20 measuring locations (the minimum number for resolving 15–150-km wavelengths) along the SWOT swath, four instrument platforms were tested: pressure-sensor-equipped inverted echo sounders (PIES), underway conductivity–temperature–depth (UCTD) sensors, instrumented moorings, and underwater gliders. In the context of the OSSE, PIES was found to be an unsuitable tool for the target region and for SSH scales 15–70 km; the slowness of a single UCTD leads to significant aliasing by high-frequency motions at short wavelengths below ~30 km; an array of station-keeping gliders may meet the requirement; and an array of moorings is the most effective system among the four tested instruments for meeting the mission’s requirement. The results shown here warrant a prelaunch field campaign to further test the performance of station-keeping gliders.
    Description: The authors would like to acknowledge the funding sources: the SWOT mission (JW, LF, DM); NASA Projects NNX13AE32G, NNX16AH76G, and NNX17AH54G (TF); and NNX16AH66G and NNX17AH33G (BQ). AF and MF were funded by the Keck Institute for Space Studies (which is generously supported by the W. M. Keck Foundation) through the project Science-driven Autonomous and Heterogeneous Robotic Networks: A Vision for Future Ocean Observations (http://kiss.caltech.edu/?techdev/seafloor/seafloor.html).
    Description: 2018-08-07
    Keywords: Altimetry ; In situ oceanic observations ; Profilers, oceanic ; Satellite observations ; Sensitivity studies ; Planning
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 3
    Publication Date: 2022-11-01
    Description: Author Posting. © American Meteorological Society, 2022. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of the Atmospheric and Oceanic Technology 39(5), (2022): 595–617, https://doi.org/10.1175/jtech-d-21-0039.1.
    Description: The future Surface Water and Ocean Topography (SWOT) mission aims to map sea surface height (SSH) in wide swaths with an unprecedented spatial resolution and subcentimeter accuracy. The instrument performance needs to be verified using independent measurements in a process known as calibration and validation (Cal/Val). The SWOT Cal/Val needs in situ measurements that can make synoptic observations of SSH field over an O(100) km distance with an accuracy matching the SWOT requirements specified in terms of the along-track wavenumber spectrum of SSH error. No existing in situ observing system has been demonstrated to meet this challenge. A field campaign was conducted during September 2019–January 2020 to assess the potential of various instruments and platforms to meet the SWOT Cal/Val requirement. These instruments include two GPS buoys, two bottom pressure recorders (BPR), three moorings with fixed conductivity–temperature–depth (CTD) and CTD profilers, and a glider. The observations demonstrated that 1) the SSH (hydrostatic) equation can be closed with 1–3 cm RMS residual using BPR, CTD mooring and GPS SSH, and 2) using the upper-ocean steric height derived from CTD moorings enable subcentimeter accuracy in the California Current region during the 2019/20 winter. Given that the three moorings are separated at 10–20–30 km distance, the observations provide valuable information about the small-scale SSH variability associated with the ocean circulation at frequencies ranging from hourly to monthly in the region. The combined analysis sheds light on the design of the SWOT mission postlaunch Cal/Val field campaign.
    Description: The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). All authors are supported by the SWOT project. J. T. Farrar was partially supported by NASA NNX16AH76G.
    Description: 2022-11-01
    Keywords: Internal waves ; Ocean dynamics ; Small scale processes ; Altimetry ; Global positioning systems (GPS) ; In situ oceanic observations ; Ship observations
    Repository Name: Woods Hole Open Access Server
    Type: Article
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