4.7 Article

Sea-Level Fingerprints Due to Present-Day Water Mass Redistribution in Observed Sea-Level Data

期刊

REMOTE SENSING
卷 13, 期 22, 页码 -

出版社

MDPI
DOI: 10.3390/rs13224667

关键词

sea level; altimetry; steric sea-level; GRACE; fingerprints

资金

  1. International Space Science Institute (ISSI)
  2. European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (GRACEFUL Synergy Grant) [855677]
  3. NASA GRACE Project [NNL14AA00C]
  4. NASA GRACE Follow-On Project [NNL14AA00C]
  5. NASA GRACE Project (JPL subcontract) [1478584]
  6. NASA GRACE Follow-On Project (JPL subcontract) [1478584]
  7. NASA [NNX17AG96G, 80NSSC20K0820]
  8. NASA [NNX17AG96G, 1001621] Funding Source: Federal RePORTER

向作者/读者索取更多资源

Satellite altimetry has shown that the rate of sea-level rise varies by region, being influenced mainly by changes in ocean temperature and salinity. Significant correlations between altimetry-based sea-level and modelled fingerprints of water mass redistribution have been detected in certain ocean regions.
Satellite altimetry over the oceans shows that the rate of sea-level rise is far from uniform, with reported regional rates up to two to three times the global mean rate of rise of ~3.3 mm/year during the altimeter era. The mechanisms causing the regional variations in sea-level trends are dominated by ocean temperature and salinity changes, and other processes such as ocean mass redistribution as well as solid Earth's deformations and gravitational changes in response to past and ongoing mass redistributions caused by land ice melt and terrestrial water storage changes (respectively known as Glacial Isostatic Adjustment (GIA) and sea-level fingerprints). Here, we attempt to detect the spatial trend patterns of the fingerprints associated with present-day land ice melt and terrestrial water mass changes, using satellite altimetry-based sea-level grids corrected for the steric component. Although the signal-to-noise ratio is still very low, a statistically significant correlation between altimetry-based sea-level and modelled fingerprints is detected in some ocean regions. We also examine spatial trend patterns in observed GRACE ocean mass corrected for atmospheric and oceanic loading and find that some oceanic regions are dominated by the fingerprints of present-day water mass redistribution.

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