A5056893590- Ocean Waves and Remote Sensing
- Oceanographic and Atmospheric Processes
- Coastal and Marine Dynamics
- Tropical and Extratropical Cyclones Research
- Marine and fisheries research
- Marine and coastal ecosystems
- Coastal wetland ecosystem dynamics
- Coastal and Marine Management
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Aeolian processes and effects
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Marine and coastal plant biology
- Wave and Wind Energy Systems
- Oil Spill Detection and Mitigation
- Marine and environmental studies
- Ancient and Medieval Archaeology Studies
- Water Quality Monitoring and Analysis
- Climate Change and Health Impacts
- Historical and Archaeological Studies
- Ancient Mediterranean Archaeology and History
- Maritime Transport Emissions and Efficiency
- Atmospheric chemistry and aerosols
- Underwater Acoustics Research
Tallinn University of Technology
2014-2025
Finnish Meteorological Institute
2021
Helmholtz-Zentrum Hereon
2016-2017
Chapter 1: CMEMS OSR5 1 1.1 IntroductionKarina von Schuckmann and Pierre-Yves Le Traon 1 1.2 Knowledge data for international Ocean governancePaula Kellett, Brittany E. Alexander Jo...
Abstract The sea surface and air-sea exchange processes have been identified as essential for both short- long-term atmospheric ocean forecasts. two phases of the fluid layer covering our planet interact across a vast range scales that we need to explore achieve better understanding processes. While satellites provide distributed large-scale view situation, highly detailed measurements, e.g., from oceanographic towers, are necessarily local. An intermediate solution can be provided by swarms...
A third generation numerical wave model SWAN (Simulating WAves Nearshore) was applied to study the spatio-temporal effect of surface currents and sea level height on significant height; describe mechanisms responsible for wave–current interaction in eastern Baltic Sea. Simulation results were validated by comparison with situ measurements deep shallow water, carried out using directional buoy RDCP respectively, TerraSAR-X imagery. hindcast period from 23 31 October 2013 included both a calm...
Abstract. This paper presents how to account for the lack of sampling variability in model data when they are combined with wave measurements. We addressed dissimilarities between types by either (i) low-pass filtering observations or (ii) adding synthetic model. Measurement–model times series these methods served as basis return period estimates a high event January 2019. During this storm northerly wind speeds Baltic Sea rose 32.5 m s−1 and an unprecedented significant height 8.1 was...
WAM, SWAN and WAVEWATCH III® were implemented to the Finnish archipelago with a 0.1 nmi grid. A comparison coastal wave buoy observations showed that models agreed on significant height, biases root-mean-square-errors (RMSE) differing at most 0.06 m. In general sense, WAM propagated long energy into archipelago, while generated highest local waves. The performance of III was wind direction dependent. model tendencies caused them disagree peak period near coast, differences in mean values...
A method for estimating meteo-marine parameters from satellite Synthetic Aperture Radar (SAR) data, intended near-real-time (NRT) service over the Baltic Sea, is presented and validated. Total significant wave height data are retrieved with an empirical function CWAVE_S1-IW, which combines spectral analysis of Sentinel-1A/B Interferometric Wide swath (IW) subscenes wind derived common C-Band Geophysical Model Functions (GMFs). In total, 15 scenes (116 acquisitions) Sea were processed...
We present the implementation and validation of OpenDrift, an open-source Lagrangian particle trajectory modeling framework for oil spill in coastal waters Estonia Baltic Sea. The was coupled with ECMWF winds, NEMO-EST05 hydrodynamical model, SWAN-EST wave validated using six drift experiments from 2022. sensitivity analysis revealed importance incorporating additional forcing factors, such as Stokes currents, which generally improved accuracy model compared to wind alone. Nevertheless,...
ALARI, V. and RAUDSEPP, U., 2012. Simulation of wave damping near coast due to offshore wind farms.Two hundred turbines with an annual productivity 2.3 TWh, which could produce up 30% the energy Estonia needs, are scheduled be constructed on separate shallows in NW Estonian coastal waters (the Baltic Sea), 5–20 km off shore. With numerical modeling, we have established a potential impact farms heights. We concluded that exists terms reduction significant height, but it is very marginal, not...
Climate change in recent decades has been identified as a significant threat to natural environments and human wellbeing. This is because some of the contemporary changes climate are abrupt result persistent state systems; so called regime shifts (RS). study aimed detect analyse timing strength RS Estonian at half-century scale (1966−2013). We demonstrate that extensive winter warming Northern Hemisphere late 1980s was represented atmospheric, terrestrial, freshwater marine systems an extent...
Abstract. The classic characterisation of swell as regular, almost monochromatic, wave trains does not necessarily accurately describe in water bodies shielded from the oceanic climate. In such enclosed areas locally generated waves still contribute to processes at air and seabed interfaces, their presence can be quantified by partitioning components based on speed relative wind. We present statistics for semi-enclosed Baltic Sea using 20 years swell-partitioned model data. significant...
Sandy beaches high in recreation value make up 16% of the over 4000 km long shoreline Estonia. The shore processes associated with climate change have remarkably accelerated recent decades. Many sandy shores suffered from strong erosion, including an excellent former beach at Valgeranna. jetties, which were built 1860s to protect navigation channel Port Pärnu clogging, prevented natural sediment transport along coast south north. At same time, is expanding, and part sand accumulates storms...
Abstract Wave buoys are a popular choice for measuring sea surface waves, and there is also an increasing interest wave information from ice-covered water bodies. Such measurements require cost-effective, easily deployable, robust devices. We have developed LainePoiss (LP)—an ice-resistant lightweight buoy. It calculates the elevation by double integrating data inertial sensors of microelectromechanical system (MEMS), transmits parameters spectra in real time over cellular or satellite...
Wind, flow and wave measurements were performed in November–December 2008 the relatively narrow shallow Suur Strait connecting waters of Väinameri Gulf Riga. During measurement period wind conditions extremely variable, including a severe storm on 23 November. The speed along strait varied between ±0.2 m s−1, except for 0.4 s−1 that occurred after as result sea level gradient. mean maximum significant heights 0.53 1.6 respectively. Because their longer fetch, southerly winds generated higher...
Suursaar, Ü., Alari, V., Tõnisson, H., 2014. Multi-scale analysis of wave conditions and coastal changes in the northeastern Baltic Sea. In: Green, A.N. Cooper, J.A.G. (eds.), Proceedings 13th International Coastal Symposium (Durban, South Africa), Journal Research, Special Issue No. 70, pp. 223–228, ISSN 0749-0208.Temporal variations shoreline have been analyzed interpreted three differently exposed Estonian sections. Using coastline contours that recorded frequently over last twelve years,...
Suursaar, Ü.; Tõnisson, H; Alari, V.; Raudsepp, U.; Rästas, H., and Anderson, A., 2016. Projected changes in wave conditions the Baltic Sea by end of 21st century corresponding shoreline changes. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., McCarroll, R.J. (eds.), Proceedings 14th International Coastal Symposium (Sydney, Australia). Journal Research, Special Issue, No. 75, pp. 1012 - 1016. Coconut Creek (Florida), ISSN 0749-0208.The aim study is to analyse possible future project coastal...
Surface wave spectra estimation from Synthetic Aperture Radar (SAR) data has been a subject of many studies. In the open ocean, where high-resolution Wave Mode capture predominately swell waves, various inverse methods have developed to extract 2D information. However, these face limitations in wind-dominated regional seas such as Baltic Sea, waves are lacking, and ScanSAR (TOPS mode for Sentinel-1 (S1)) acquisitions with lower resolution widespread. To overcome problem, long-short-term...
The objective of this paper is to quantify resuspension and bed load transport bottom sediments, induced by fast ferry wakes wind waves near Aegna jetty, Tallinn Bay, using in situ measurements waves, optical properties sea water. A new autonomous experimental set two PAR-sensors, anchored into the bed, was used measure underwater irradiation. Wakes usually caused a rapid increase density water up 50% from its background value. total impact terms resuspended sediment concentration has not...
Herkül, K.; Torn, Suursaar, Ü.; Alari, V., and Peterson, A., 2016. Variability of benthic communities in relation to hydrodynamic conditions the north-eastern Baltic Sea. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., McCarroll, R.J. (eds.), Proceedings 14th International Coastal Symposium (Sydney, Australia). Journal Research, Special Issue, No. 75, pp. 867–871. Coconut Creek (Florida), ISSN 0749-0208.Wave forcing is an important variable that influences spatial patterns temporal dynamics...
Cyclone Gudrun (Erwin) crossed the Baltic Sea in 8-9 January 2005. The maximum sustained wind speed measured over Proper reached 28 m/s (gusts 37.5 m/s) and prior high surge (2.75 m Pärnu city), blew mainly from sector SW-WSW. hydrodynamic consequences, coastal damages wave conditions Gulf of Finland resulting windstorm have been analyzed previously. Lacking was knowledge wave-surge interaction role induced setup. aim this paper is to study effects upon surface field dynamics reconstruct...