Rietbroek, Roelof; Brunnabend, Sandra-Ester; Kusche, Jürgen; Schröter, Jens; Dahle, Christoph (2015): Global and Regional Sea level budget components from GRACE and radar altimetry (2002-2014) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.855539, Supplement to: Rietbroek, R et al. (2016): Revisiting the contemporary sea-level budget on global and regional scales. Proceedings of the National Academy of Sciences, 113(6), 1504-1509, https://doi.org/10.1073/pnas.1519132113
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Abstract:
Dividing the sea-level budget into contributions from ice sheets and glaciers, the water cycle, steric expansion, and crustal movement is challenging, especially on regional scales. Here, Gravity Recovery And Climate Experiment (GRACE) gravity observations and sea-level anomalies from altimetry are used in a joint inversion, ensuring a consistent decomposition of the global and regional sea-level rise budget. Over the years 2002-2014, we find a global mean steric trend of 1.38 ± 0.16 mm/y, compared with a total trend of 2.74 ± 0.58 mm/y. This is significantly larger than steric trends derived from in situ temperature/salinity profiles and models which range from 0.66 ± 0.2 to 0.94 ± 0.1 mm/y. Mass contributions from ice sheets and glaciers (1.37 ± 0.09 mm/y, accelerating with 0.03 ± 0.02 mm/y**2) are offset by a negative hydrological component (-0.29 ± 0.26 mm/y). The combined mass rate (1.08 ± 0.3 mm/y) is smaller than previous GRACE estimates (up to 2 mm/y), but it is consistent with the sum of individual contributions (ice sheets, glaciers, and hydrology) found in literature. The altimetric sea-level budget is closed by coestimating a remaining component of 0.22 ± 0.26 mm/y. Well above average sea-level rise is found regionally near the Philippines (14.7 ± 4.39 mm/y) and Indonesia (8.3 ± 4.7 mm/y) which is dominated by steric components (11.2 ± 3.58 mm/y and 6.4 ± 3.18 mm/y, respectively). In contrast, in the central and Eastern part of the Pacific, negative steric trends (down to -2.8 ± 1.53 mm/y) are detected. Significant regional components are found, up to 5.3 ± 2.6 mm/y in the northwest Atlantic, which are likely due to ocean bottom pressure variations.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | Rietbroek, Roelof | |||
| 2 | File name | File name | Rietbroek, Roelof | |||
| 3 | File format | File format | Rietbroek, Roelof | |||
| 4 | File size | File size | kByte | Rietbroek, Roelof | ||
| 5 | Uniform resource locator/link to file | URL file | Rietbroek, Roelof |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
25 data points
Data
| 1 Content | 2 File name | 3 File format | 4 File size [kByte] | 5 URL file |
|---|---|---|---|---|
| Time series of sea level changes for dedicated regions, and the global ocean average. The sea level components are split up in different contributions (Greenland, Antarctica, Glaciers, hydrology, etc.) | SealevelTimeseries.zip | zip folder | 483 | SealevelTimeseries.zip |
| Geographic polygons delimiting the region of interest | Coastal_polygons.zip | zip folder | 9 | Coastal_polygons.zip |
| Offset of the Center of common mass of the Earth System relative the Center of surface figure caused by the different surface loading contributions (Antarctica, Greenland, etc) | Geocenter_CM-CF_tabsep.zip | zip folder | 32 | Geocenter_CM-CF_tabsep.zip |
| Netcdf file containing the data from a GRACE+altimetry joint inversion. This is the datasource where the time series are derived from | InvResults_GRACE+Jason1n2_PNAS2015_Rietbroek.nc | Netcdf | 641000 | InvResults_GRACE+Jason1n2_PNAS2015_Rietbroek.nc |
| Google earth file containing some additional visualization of the results in the paper | Sealevel_pnasRietbroek2017.kmz | kmz | 1600 | Sealevel_pnasRietbroek2017.kmz |