Cyclone Xaver seen by geodetic observations

Fenoglio-Marc, Luciana; Scharroo, Remko; Annunziato, Alessandro; Mendoza, Leonor; Becker, Matthias; Lillibridge, John

doi:10.1002/2015gl065989

Cited by 19 publications

(19 citation statements)

References 23 publications

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“…It is worth noting that such improvements in corrections should enable the full coastal exploitation of the data now flowing in from Ka-and SAR altimetry, and in particular the global SAR altimetry data now coming from Sentinel-3. This growing coastal altimetry field is going to support the monitoring of sea level in the coastal zone as well as other complementary applications such as the study of extreme events (storm surges-see for example Fenoglio-Marc et al 2015) and the validation of coastal wave models.…”

Section: Discussionmentioning

confidence: 99%

Monitoring Sea Level in the Coastal Zone with Satellite Altimetry and Tide Gauges

et al. 2016

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We examine the issue of sustained measurements of sea level in the coastal zone, first by summarizing the long-term observations from tide gauges, then showing how those are now complemented by improved satellite altimetry products in the coastal ocean. We present some of the progresses in coastal altimetry, both from dedicated reprocessing of the radar waveforms and from the development of improved corrections for the atmospheric effects. This trend towards better altimetric data at the coast comes also from technological innovations such as Ka-band altimetry and SAR altimetry, and we discuss the advantages deriving from the AltiKa Ka-band altimeter and the SIRAL altimeter on CryoSat-2 that can be operated in SAR mode. A case study along the UK coast demonstrates the good agreement between coastal altimetry and tide gauge observations, with root mean square differences as low as 4 cm at many stations, allowing the characterization of the annual cycle of sea level along the UK coasts. Finally, we examine the evolution of the sea level trend from the open to the coastal ocean along the western coast of Africa, comparing standard and coastally improved products. Different products give different sea level trend profiles, so the recommendation is that additional efforts are needed to study sea level trends in the coastal zone from past and present satellite altimeters. Further improvements are expected from more refined processing and screening of data, but in particular from the constant improvements in the geophysical corrections.

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Section: Discussionmentioning

confidence: 99%

Monitoring Sea Level in the Coastal Zone with Satellite Altimetry and Tide Gauges

et al. 2016

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“…9) are observed. Fenoglio et al (2015) described the first surge maximum as a wind-induced maximum. They found that at Aberdeen and Lowestoft stations, the surge derived from the tide gauge records had only one maximum, reaching the eastern North Sea coastal areas (anticlockwise propagation) approximately 10 h later than Lowestoft (easternmost UK coast), causing the second storm surge maximum detected by the measurements in the German Bight.…”

Section: Sea Level and Wave-induced Forcingmentioning

confidence: 99%

“…Corrections for the ocean tide, the atmospheric inverse barometer effect and wind are not used. The storm surge is estimated by correcting the TWLE for the ocean tide given by the global ocean tide model GOT4.8 (Ray et al, 2011); see Fenoglio-Marc et al (2015) for more details.…”

Section: Observational Datamentioning

confidence: 99%

“…As explained in Fenoglio-Marc et al (2015), the standard altimeter products are extracted from the Radar Altimeter Database System (RADS) (Scharroo, 2013). The sea water level corresponding to the instantaneous in situ tide gauge measurement, which was called Total Water Level Envelope (TWLE) in Fenoglio-Marc et al (2015), is estimated as the difference between the orbital altitude above the mean sea surface model DTU10 and the radar range corrected for the ionospheric and tropospheric path delay, solid Earth, sea state bias and load tide effects. Corrections for the ocean tide, the atmospheric inverse barometer effect and wind are not used.…”

Section: Observational Datamentioning

confidence: 99%

“…The German Bight is dominated by strong north-westerly winds and high waves due to north-eastern Atlantic lowpressure systems (Rossiter, 1958;Fenoglio-Marc et al, 2015). Extratropical cyclones in the area present a considerable hazard, especially in the shallow coastal Wadden Sea areas (Jensen and Mueller-Navarra, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Coastal flooding: impact of waves on storm surge during extremes – a case study for the German Bight

Staneva¹,

Wahle²,

Koch³

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. This study addresses the impact of wind, waves, tidal forcing and baroclinicity on the sea level of the German Bight during extreme storm events. The role of wave-induced processes, tides and baroclinicity is quantified, and the results are compared with in situ measurements and satellite data. A coupled high-resolution modelling system is used to simulate wind waves, the water level and the three-dimensional hydrodynamics. The models used are the wave model WAM and the circulation model GETM. The two-way coupling is performed via the OASIS3-MCT coupler. The effects of wind waves on sea level variability are studied, accounting for wave-dependent stress, wave-breaking parameterization and wave-induced effects on vertical mixing. The analyses of the coupled model results reveal a closer match with observations than for the stand-alone circulation model, especially during the extreme storm Xaver in December 2013. The predicted surge of the coupled model is significantly enhanced during extreme storm events when considering wavecurrent interaction processes. This wave-dependent approach yields a contribution of more than 30 % in some coastal areas during extreme storm events. The contribution of a fully three-dimensional model compared with a two-dimensional barotropic model showed up to 20 % differences in the water level of the coastal areas of the German Bight during Xaver. The improved skill resulting from the new developments justifies further use of the coupled-wave and three-dimensional circulation models in coastal flooding predictions.

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Altimeter Surveys, Coastal Tides, and Shelf Circulation

Han

2017

Encyclopedia of Earth Sciences Series

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Cyclone Xaver seen by geodetic observations

Cited by 19 publications

References 23 publications

Monitoring Sea Level in the Coastal Zone with Satellite Altimetry and Tide Gauges

Monitoring Sea Level in the Coastal Zone with Satellite Altimetry and Tide Gauges

Coastal flooding: impact of waves on storm surge during extremes – a case study for the German Bight

Altimeter Surveys, Coastal Tides, and Shelf Circulation

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