Impact of Ocean Domain Definition on Sea Level Budget

Total sea level changes from space radar altimetry are mainly decomposed into two contributions of mass addition and volume expansion oceans, measured by GRACE gravimeter Argo float array, respectively. However, the averages altimetry, mass, steric have been usually examined over respective data domains, which different to one another. Errors arise this area inconsistency is rarely discussed in previous studies. Here study, an alternative definition ocean domain applied for examining budgets, results compared with estimates areas. It shows that impact estimated about 0.3 mm/yr global trend difference, based on a consistent yield closer agreement between + trend. This contribution would explain some discordances past budget