Abstract's details
Arctic sea surface height from a multi-altimeter combination
CoAuthors
Event: 2020 Ocean Surface Topography Science Team Meeting (virtual)
Session: Science II: Large Scale Ocean Circulation Variability and Change
Presentation type: Type Forum only
Contribution: PDF file
Abstract:
We present a new estimate of Arctic sea level based on the optimal interpolation of three altimeter missions. Measurements from SARAL/AltiKa, CryoSat-2 and Sentinel-3A are blended together providing an unprecedented resolution for this type of products.
The final gridded fields cover all latitudes north of 50°N, on a 25 km EASE2 grid, with one grid every three days over two years.
We use the Adaptive retracker to process both open ocean and lead echoes on SARAL/AltiKa thus removing the need to estimate a bias between open ocean an ice covered areas. SARAL/AltiKa also provides the baseline for the cross-calibation of CryoSat-2 and Sentinel-3A.
When compared to independent data, the combined product exhibits a much better performance than mono-mission datasets.
This combined Arctic sea level dataset, along with three mono-mission datasets (75km grid, monthly resolution) is freely available from AVISO.
The final gridded fields cover all latitudes north of 50°N, on a 25 km EASE2 grid, with one grid every three days over two years.
We use the Adaptive retracker to process both open ocean and lead echoes on SARAL/AltiKa thus removing the need to estimate a bias between open ocean an ice covered areas. SARAL/AltiKa also provides the baseline for the cross-calibation of CryoSat-2 and Sentinel-3A.
When compared to independent data, the combined product exhibits a much better performance than mono-mission datasets.
This combined Arctic sea level dataset, along with three mono-mission datasets (75km grid, monthly resolution) is freely available from AVISO.