Sea-level variability and change along the Norwegian coast between 2003 and 2018 from satellite altimetry, tide gauges, and hydrography

Mangini, Fabio; Chafik, Léon; Bonaduce, Antonio; Bertino, Laurent; Nilsen, Jan Even Øie

doi:10.5194/os-18-331-2022

Cited by 10 publications

(10 citation statements)

References 42 publications

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“…This method allows for identification of unevenly spaced changepoints which makes it ideal for use in sea level timeseries analysis. Sensitivity analysis of the trends was done 80 for the trends calculated for the different periods.…”

Section: Methodsmentioning

confidence: 99%

Determining sea-level rise in the Caribbean: A shift from temperature to mass control

Maitland,

Richter,

Raj

et al. 2024

Sci Rep

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Tropical Small Island Developing States (SIDS), such as those in the Caribbean, are among the most vulnerable to the impacts of climate change, most notably sea-level rise. The current sea-level rise in the Caribbean is 3.40 ± 0.3 mm/year (1993–2019), which is similar to the 3.25 ± 0.4 mm/year global mean sea-level (GMSL) rise (1993–2018). Throughout the year, Caribbean seasonal sea-level variability is found to respond to sea surface temperature variability. Over the past few decades, the trend in Caribbean Sea-level rise is also found to be variable. Satellite altimetry and steric sea-level records of the Caribbean region reveal a shift in the late 2003-early 2004, which separates two distinct periods of sea-level rise. Thermal expansion dominates the sea-level trend from 1993–2003. Following this period, there is an increased trend in sea-level rise, with a dominance of mass changes from 2004–2019, as confirmed by GRACE data. During this period, the sea-level trend is 6.15 ± 0.5 mm/year, which is 67% faster than the most recent estimates of global mean sea-level rise provided by the Intergovernmental Panel on Climate Change (3.69 ± 0.5 mm/year for the period 2006–2018). Despite its reduced importance, increasing temperatures contribute greatly to sea-level rise in the Caribbean region through thermal expansion of ocean water, hence there is a need to limit the current trend of global warming.

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Section: Methodsmentioning

confidence: 99%

Determining sea-level rise in the Caribbean: A shift from temperature to mass control

Maitland,

Richter,

Raj

et al. 2024

Sci Rep

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“…To build a monthly mean sea-level time series at each hydrographic station, this paper follows the same procedure as in Mangini et al 58 . The results of that study indicate that this procedure returns sea-level time series representative of the location occupied by each hydrographic station if the satellite altimetry observations are averaged over each month and within a radius of 200 km from the hydrographic station and a distance of 20 km from the coast.…”

Section: Methodsmentioning

confidence: 99%

“…Previous studies have shown that the ALES satellite altimetry dataset well captures the sea-level variability along a significant fraction of the coastal ocean 54 – 57 . A more recent study 58 has evaluated the dataset against the Norwegian set of tide gauges and has found good agreement in the region.…”

Section: Datamentioning

confidence: 96%

“…Following the recommendations from the providers, data were discarded if located within 3 km from the coast, if the significant wave height (SWH) exceeded 11 m, and if the standard deviation was larger than 0.2 m. SLA observations were also excluded if they exceeded 1.5 m, instead of 2.5 m as recommended, because Mangini et al 58 found that a more stringent condition returns results that agree better with the tide gauges.…”

Section: Datamentioning

confidence: 99%

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Detection and attribution of intra-annual mass component of sea-level variations along the Norwegian coast

Mangini,

Bonaduce,

Chafik

et al. 2023

Sci Rep

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Reliable sea-level observations in coastal regions are needed to assess the impact of sea level on coastal communities and ecosystems. This paper evaluates the ability of in-situ and remote sensing instruments to monitor and help explain the mass component of sea level along the coast of Norway. The general agreement between three different GRACE/GRACE-FO mascon solutions and a combination of satellite altimetry and hydrography gives us confidence to explore the mass component of sea level in coastal areas on intra-annual timescales. At first, the estimates reveal a large spatial-scale coherence of the sea-level mass component on the shelf, which agrees with Ekman theory. Then, they suggest a link between the mass component of sea level and the along-slope wind stress integrated along the eastern boundary of the North Atlantic, which agrees with the theory of poleward propagating coastal trapped waves. These results highlight the potential of the sea-level mass component from GRACE and GRACE-FO, satellite altimetry and the hydrographic stations over the Norwegian shelf. Moreover, they indicate that GRACE and GRACE-FO can be used to monitor and understand the intra-annual variability of the mass component of sea level in the coastal ocean, especially where in-situ measurements are sparse or absent.

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“…In a recent analysis of the Arctic Ocean SL record from altimetry, Rose et al (2019) found a rate of 3.19 mm/year (3.10-3.37 95% confidence interval) between 1991 and 2018 for the sector covering the European Arctic. A number of studies in the region have looked at coastal sea level variability and trends with particular focus on Norway (e.g., Breili, 2022;Breili et al, 2017;Frederikse et al, 2016;Henry et al, 2012;Mangini et al, 2022;Richter et al, 2012).…”

Section: Past Sea Level Changesmentioning

confidence: 99%

Sea Level Rise in Europe: Observations and projections

Melet,

van de Wal,

Amores

et al. 2023

Preprint

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Abstract. Sea level rise (SLR) is a major concern for Europe, where 30 million people live in the historical 1-in-100-year event flood coastal plains. The latest IPCC assessment reports provide a literature review on past and projected SLR, and their key findings are synthesized here with a focus on Europe. The present paper complements IPCC reports and contributes to the Knowledge Hub on SLR European Assessment Report. Here, the state of knowledge of observed and 21st century projected SLR and changes in extreme sea levels (ESLs) are documented with more regional information for European basins as scoped with stakeholders. In Europe, satellite altimetry shows that absolute sea level trends are on average slightly above the global mean rate, with only a few areas showing no change or a slight decrease such as central parts of the Mediterranean Sea. The spatial pattern of absolute SLR in European Seas is largely influenced by internal climate modes, especially the North Atlantic Oscillation, which varies on year-to-year to decadal timescales. In terms of relative sea level rise (RSLR), vertical land motions due to human induced subsidence and glacial isostatic adjustment (GIA) are important for many coastal European regions, leading to lower or even negative RSLR in the Baltic Sea, and to large rates of RSLR for subsiding coastlines. Projected 21st century local SLR for Europe is broadly in-line with projections of GMSLR rise in most places. Some European coasts are projected to experience a relative SLR by 2100 below the projected GMSLR, such as the Norwegian coast, the southern Baltic Sea, the northern part of the UK and Ireland. A relative sea level fall is projected for the northern Baltic Sea. RSLR along other EU coasts is projected to be slightly above the GMSLR, for instance the Atlantic coasts of Portugal, Spain, France, Belgium and the Netherlands. Higher-resolution regionalized projections are needed to better resolve dynamic sea level changes especially in semi-enclosed basins, such as the Mediterranean Sea, North Sea, Baltic Sea and Black Sea. In addition to ocean dynamics, GIA and Greenland ice mass loss and associated Earth gravity, rotation and deformation effects are important drivers of spatial variations of projected European RSLR. High-end estimates of SLR in Europe are particularly sensitive to uncertainties arising from the estimates of the Antarctic ice mass loss. Regarding ESLs, the frequency of occurrence of the historical centennial event (HCE) level is projected to be amplified for most EU coasts, except along the northern Baltic Sea coasts where a decreasing probability is projected because of relative sea level fall induced by GIA. The largest HCE amplification factors are projected for the southern European Seas (Mediterranean and Iberian Peninsula coasts), while the smallest amplification factors are projected in macro-tidal regions exposed to storms and induced large surges such as the south-eastern North Sea. Finally, an emphasis is given on processes that are especially important for specific regions, such as waves, tides in the north-eastern Atlantic; vertical land motion for the European Arctic and Baltic Sea; seiches, meteo-tsunamis and medicanes in the Mediterranean Sea; non-linear interactions between drivers of coastal sea level extremes in the shallow North Sea.

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Sea-level variability and change along the Norwegian coast between 2003 and 2018 from satellite altimetry, tide gauges, and hydrography

Cited by 10 publications

References 42 publications

Determining sea-level rise in the Caribbean: A shift from temperature to mass control

Determining sea-level rise in the Caribbean: A shift from temperature to mass control

Detection and attribution of intra-annual mass component of sea-level variations along the Norwegian coast

Sea Level Rise in Europe: Observations and projections

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