A new review of the altimetry methodologies used to obtain useful environmental information across the Arctic Ocean, including the effects of climate change, has been recently published in Remote Sensing with the title “Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives”.
The article, builds on cross-disciplinary discussions involving the CCI's Sea level and Sea Ice teams during workshops organised by the International Space Science Institute in Bern, Switzerland. The article reports a review and a discussion of the following:
- drivers for improved altimetry retrievals in the Arctic Ocean
- approaches to classifying sea-ice, ocean and a mixture of the two surfaces
- geophysical correction issues
The article concludes with some perspectives on future developments, joint exploitation of the Ku-band and Ka-band frequencies, interferometric SAR altimetry and opportunities for fusion with measurements from laser altimetry or from the SMOS (Soil Moisture and Ocean Salinity) satellite adapted successfully to retrieve the thickness of thin ice in the marginal ice zone and during the freeze-up period.
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