Thu Apr 10, F. Flechtner
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Ponte, Rui M. and Schindelegger, Michael, 2024. Seasonal Cycle in Sea Level Across the Coastal Zone. Earth and Space Science, 11(12):2024EA003978, doi:10.1029/2024EA003978.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024ESS...1103978P,
author = {{Ponte}, Rui M. and {Schindelegger}, Michael},
title = "{Seasonal Cycle in Sea Level Across the Coastal Zone}",
journal = {Earth and Space Science},
keywords = {sea level, seasonal cycle, tide gauge, satellite altimetry, GRACE, sea level budget},
year = 2024,
month = dec,
volume = {11},
number = {12},
pages = {2024EA003978},
abstract = "{Data from tide gauges and satellite altimeters are used to provide an
up-to-date assessment of the mean seasonal cycle in sea level
({\ensuremath{\zeta}} ) over most of the global coastal ocean.
The tide gauge records, where available, depict a
{\ensuremath{\zeta}} seasonal cycle with complex spatial
structure along and across continental boundaries, and an annual
oscillation dominating over semiannual variability, except in a
few regions (e.g., the northwestern Gulf of Mexico). Comparisons
between tide gauge and altimeter data reveal substantial root-
mean-square differences and only slight improvements in
agreement when using along-track data optimized for coastal
applications. Quantification of the uncertainty in the altimeter
products, inferred from comparing gridded and along-track
estimates, indicate that differences to tide gauges partly
reflect short-scale features of the seasonal cycle in proximity
to the coasts. We additionally probe the {\ensuremath{\zeta}}
seasonal budget using satellite gravimetry-based manometric
estimates and steric terms calculated from the World Ocean Atlas
2023. Focusing on global median values, the sum of the estimated
steric and manometric harmonics can explain {\ensuremath{\sim}}
65\% (respectively 40\%) of the annual (semiannual) variance in
the coastal {\ensuremath{\zeta}} observations. We identify
several regions, for example, the Australian seaboard, where the
seasonal {\ensuremath{\zeta}} budget is not closed and
illustrate that such analysis is mainly limited by the coarse
spatial resolution of present satellite-derived mass change
products. For most regions with a sufficiently tight budget
closure, we find that although the importance of the manometric
term generally increases with decreasing water depth, steric
contributions are non-negligible near coastlines, especially at
the annual frequency.}",
doi = {10.1029/2024EA003978},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024E&SS...1103978P},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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