194
Views
9
CrossRef citations to date
0
Altmetric
Original Articles

Altimeter Data Evaluation in the Coastal Gulf of Maine and Mid-Atlantic Bight Regions

&
Pages 340-363 | Received 15 Nov 2010, Accepted 24 Feb 2011, Published online: 22 Aug 2011
 

Abstract

Satellite altimeter sea surface height anomaly (SSHA) data accuracy and applications are rapidly maturing over the open ocean, but more attention is required where continental shelves and marginal seas are concerned. Refined radar range measurement correction approaches are needed to enhance the quality of coastal altimeter SSHA data and to enhance the potential impact that altimeter data can play in improved ocean circulation modeling and prediction. This study provides a regional assessment of satellite altimeter SSHA data from the Jason-2, Jason-1, and TOPEX/Poseidon data sets collected over the Northwest Atlantic coastal region of the United States. The validation approach follows recent studies in numerous shelf regions to address changes from standard or default data quality flagging scheme that can enhance satellite altimeter SSHA data recovery, optimal choice of de-aliasing corrections in deriving subtidal sea level time series, and validation of altimeter data using in situ tide gauge and current measurement data sets. Spatial analyses show the impact of data filtering and corrections from the coastline out onto the slope. Revised handling of the data provides a 5–10% increase in availability (from about 70% up to 80% for waters beyond 50 km from shore). The RMS differences between tide gauge and surface layer current measurements at the 60 day time scale are 3–4 cm and 6 cm/s, respectively, and of magnitude consistent with several recent coastal altimeter data validation efforts.

Acknowledgements

The authors thank the WebTide model development personnel in Ocean Science Division, Bedford Institute of Oceanography, Canada, for their technical comments during the model implementation. The GoMOOS buoy and NOAA/NOS tide gauge projects are also acknowledged for providing the buoy current and sea level data. Insightful comments from two anonymous reviewers help improving the quality of the paper. Discussions with Dr. R. Scharroo during this work are greatly acknowledged. The research is sponsored by NASA's Science Directorate.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.