Here's something to review ... for some
Revisiting the contemporary sea-level budget on global and regional scales
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/y2) 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 co-estimating 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.
http://www.pnas.org/content/113/6/1504
To be published by the National Academy of Science ... a paper and/or report must be submitted for "peer" review
This report was and did pass peer review
Oh, btw ... the Ocean is a pretty big thing to measure all components at the same time using sampling techniques which will afford one accurate and/or
meaningful scientific results ... no argument from me on that aspect of this discussion
[Edited on 2-24-2016 by wessongroup] |