Progress

Oceans

Progress (April 2018)

Our initial work investigated the global salt budget study to understand if we could use it to improve estimates of ocean mass trends.

Next, as part of BHM framework development, we are in the process of estimating steric sea level trends (due to temperature and salinity) for 2005-2015 on a global scale. Based on observations and prior knowledge about trends in sea surface height (SSH; from altimetry), GIA (from the ICE-6G forward model) and ocean mass (from GRACE), the residual SSH signal (i.e. altimetry minus mass) should reflect steric changes. We will compare our solution with four established ‘steric trend’ gridded datasets to assess their performance, focusing on basin-scale trends and under-sampled ocean areas such as polar regions.

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