scholarly journals From regional to local scale modelling on the south-eastern Brazilian shelf: case study of Paranaguá estuarine system

2016 ◽  
Vol 64 (3) ◽  
pp. 277-294 ◽  
Author(s):  
Guilherme Augusto Stefanelo Franz ◽  
Paulo Leitão ◽  
Aires dos Santos ◽  
Manuela Juliano ◽  
Ramiro Neves
Keyword(s):  
Numerical Model ◽  
Coastal Upwelling ◽  
Oil Spills ◽  
Storm Surges ◽  
Resonance Phenomenon ◽  
Estuarine System ◽  
The South ◽  
South Eastern ◽  
Tidal Propagation ◽  
Tidal Potential

Abstract The applicability of a numerical model following a downscaling methodology was evaluated for the south-eastern Brazilian shelf (regional model) and Paranaguá estuarine system (local model). This approach permits the simulation of different scale processes, such as storm surges and coastal upwelling, and is suitable for operational forecasting purposes. When large areas are covered by regional models, the tidal propagation inside the domain can be significantly affected by the local tidal potential, mainly where the resonance phenomenon is observed. The south-eastern Brazilian shelf is known for the resonance of the third-diurnal principal lunar tidal constituent (M3), the largest amplitudes being found in the Paranaguá estuarine system. Therefore, the significance of the local tidal potential was assessed in this study for the most important tidal constituents inside the estuarine system (including M3). The model validation was performed with tidal gauge data, Argo float profiles and satellite measurements of Sea Surface Temperature. The methodology described in this study can be replicated for other important estuarine systems located on the south-eastern Brazilian shelf. Furthermore, the numerical model was developed within a perspective of operational nowcast/forecast simulations, useful for several activities such as navigation and response to emergencies (e.g., oil spills).

scholarly journals Remote Sensing of Coastal Upwelling in the South-Eastern Baltic Sea: Statistical Properties and Implications for the Coastal Environment

2018 ◽  
Vol 10 (11) ◽  
pp. 1752 ◽  
Author(s):  
Toma Dabuleviciene ◽  
Igor E. Kozlov ◽  
Diana Vaiciute ◽  
Inga Dailidiene
Keyword(s):  
Baltic Sea ◽  
Satellite Data ◽  
Coastal Upwelling ◽  
Optical Data ◽  
Curonian Lagoon ◽  
The South ◽  
Near Surface ◽  
South Eastern ◽  
The Baltic ◽  
Eastern Baltic

A detailed study of wind-induced coastal upwelling (CU) in the south-eastern Baltic Sea is presented based on an analysis of multi-mission satellite data. Analysis of moderate resolution imaging spectroradiometer (MODIS) sea surface temperature (SST) maps acquired between April and September of 2000–2015 allowed for the identification of 69 CU events. The Ekman-based upwelling index (UI) was applied to evaluate the effectiveness of the satellite measurements for upwelling detection. It was found that satellite data enable the identification of 87% of UI-based upwelling events during May–August, hence, serving as an effective tool for CU detection in the Baltic Sea under relatively cloud-free summer conditions. It was also shown that upwelling-induced SST drops, and its spatial properties are larger than previously registered. During extreme upwelling events, an SST drop might reach 14 °C, covering a total area of nearly 16,000 km2. The evolution of an upwelling front during such intensive events is accompanied by the generation of transverse filaments extending up to 70 km offshore. An analysis of the satellite optical data shows a clear decline in the chlorophyll-a concentration in the coastal zone and in the shallow Curonian Lagoon, where it drops down by an order of magnitude. It was also shown that a cold upwelling front alters the stratification in the atmospheric boundary layer, leading to a sudden drop of air temperature and near-surface winds.

scholarly journals Oil spill modelling methods: application to the south–eastern part of the Baltic Sea

Baltica ◽  
2014 ◽  
Vol 27 (special) ◽  
pp. 15-22 ◽  
Author(s):  
Alexander Kileso ◽  
Boris Chubarenko ◽  
Petras Zemlys ◽  
Igor Kuzmenko
Keyword(s):  
Baltic Sea ◽  
Oil Spill ◽  
Oil Spills ◽  
The State ◽  
The South ◽  
The Baltic Sea ◽  
South Eastern ◽  
The Baltic ◽  
Modelling Methods ◽  
State Of Art

The state-of-art in oil spill modelling methods is summarized, focusing on development since 2000. Some recommendations for possible application of these methods to the south–eastern part of the Baltic Sea are prepared. Particular attention is paid on the methods of parameterization of volume of oil spill and calculation of advection of the oil spills. Consideration is also given to methods used in oil weathering models.

scholarly journals Solutions for effective oil spill management in the south–eastern part of the Baltic Sea

Baltica ◽  
2014 ◽  
Vol 27 (special) ◽  
pp. 3-8 ◽  
Author(s):  
Sergej Suzdalev ◽  
Saulius Gulbinskas ◽  
Vadim Sivkov ◽  
Tatiana Bukanova
Keyword(s):  
Baltic Sea ◽  
Oil Spill ◽  
Oil Spills ◽  
Oil Pollution ◽  
Environmental Damage ◽  
The South ◽  
The Baltic Sea ◽  
South Eastern ◽  
Oil Export ◽  
The Baltic

The Baltic Sea is facing exceptionally intensive marine traffic. Oil products in addition to other cargo types are being transported in this marine area. Therefore, the risk of potential oil pollution is very high. Although, the Baltic Sea has not experienced catastrophic oil spills, there have been spills causing serious environmental damage in the region. Construction of oil terminals and planned growth of Russian oil export through Baltic Sea ports along with the operation of large oil enterprises and oil drilling platforms make maritime safety a priority task for the Baltic Sea region. The publications collected in present Baltica Journal Special Issue set sights on the improvement of oil spill management in the South–Eastern Baltic Sea as well as stimulate the appearance of new transnational response agreements in the region.

scholarly journals First recorded bloom of Akashiwo sanguinea (Dinophyceae) from the Cochin backwaters, a tropical estuarine system along the South Eastern Arabian Sea

2020 ◽  
Vol 49 (4) ◽  
pp. 391-397
Author(s):  
Twinkle Sathish ◽  
Lathika Cicily Thomas ◽  
Aishwarya ◽  
Niya Benny ◽  
K.B. Padmakumar
Keyword(s):  
Arabian Sea ◽  
Red Tide ◽  
Monsoon Season ◽  
Estuarine System ◽  
The South ◽  
South Eastern ◽  
Routine Monitoring ◽  
Eastern Arabian Sea ◽  
Akashiwo Sanguinea ◽  
Continuous Presence

AbstractAkashiwo sanguinea, a cosmopolitan red tide-forming dinoflagellate, is reported for the first time as a bloom from the Cochin estuary along the South Eastern Arabian Sea. Monthly sampling showed the continuous presence of A. sanguinea with occasional blooms. Blooms of A. sanguinea with the highest abundance of 2.8 × 105 cells l−1 were observed during the monsoon season (June 2019) with chlorophyll a of 17.2 mg m−3. The bloom period was characterized by higher concentrations of nitrate (26 μmol l−1) and phosphate (3.8 μmol l−1). Routine monitoring of the bloom region showed the survival of the Akashiwo sanguinea population in the temperature (26 to 30°C) and salinity (22 to 24 PSU) range indicating its eurythermal and euryhaline characteristics.

scholarly journals Assessment of the sensitivity of sandy coasts of the south–eastern part of the Baltic to oil spills

Baltica ◽  
2014 ◽  
Vol 27 (special) ◽  
pp. 55-64 ◽  
Author(s):  
Nerijus Blažauskas ◽  
Dmitry Dorokhov
Keyword(s):  
Coastal Zone ◽  
Oil Spills ◽  
Sandy Beaches ◽  
Offshore Platforms ◽  
The South ◽  
South Eastern ◽  
Response Planning ◽  
Marine Habitats ◽  
Near Shore ◽  
The Baltic

The sandy coasts of the south–eastern Baltic Sea are the unique landscape along the shores of Poland, Kaliningrad Oblast (Russia), Lithuania and Latvia. Flat sandy beaches, protective dune ridges and near shore sandy spits are very valuable and attractive resources for human recreation and valuable habitat for wildlife. Intensifying shipping, operation of oil terminals and offshore platforms poses a constant threat not only to coastal and socio–economic resources, but also to sensitive underwater landscapes of marine areas and vulnerable marine habitats. Analysis of environmental sensitivity proved to be an effective tool for national and regional oil spill response planning. However, in order to complete the precise evaluation of near shore and coastal zone sensitivity to possible oil spills there is a need to identify vulnerable coastal sectors and complete detailed mapping of underwater landscapes. This is achieved by developing an integrated methodology for analysis of valuable coastal zone sensitivity to potential oil spills.

scholarly journals Atmospheric forcing of upwelling along the south-eastern Baltic coast

Baltica ◽  
2018 ◽  
Vol 31 (1) ◽  
pp. 73-85 ◽  
Author(s):  
Ewa Bednorz ◽  
Bartosz Czernecki ◽  
Marek Półrolniczak ◽  
Arkadiusz M. Tomczyk
Keyword(s):  
Sea Level ◽  
Coastal Upwelling ◽  
Research Area ◽  
Positive Pressure ◽  
The South ◽  
Sea Level Pressure ◽  
Level Pressure ◽  
South Eastern ◽  
Circulation Types ◽  
Eastern Baltic

The meteorological forcing on the occurrence of upwelling along the south-eastern Baltic Sea coast (Lithuanian-Latvian sector) is analysed in this study. The sea level pressure patterns and the locations of pressure centres inducing and inhibiting upwelling were identified. The research was performed for the years 1982–2017, for the months of May–September, when the sea waters are thermally stratified and the phenomenon is detectable. The frequency of upwelling is the highest in June (approximately 15%), July and August (11–13%) and the lowest in September (7%). The central and northern part of the Lithuanian–Latvian coast is most favourable for upwelling occurrence (frequency up to 20% in summer months). The main features of the sea level pressure patterns that induce upwelling in the research area are positive pressure anomalies spreading over Northern Europe and the Norwegian Sea, while negative anomalies encompass Southern Europe. Airflow around the anticyclonic centres gives a north-eastern component to the wind direction over the Lithuanian-Latvian shore. Two circulation types were recognized as inducing the occurrence of upwelling along the Lithuanian–Latvian coast. Both of them are characterized by the anticyclonic centres located west or northwest of the study area and intensify the northerly or north-easterly airflow over the research area. Different pressure patterns with the negative anomalies of sea level pressure spreading over the North Sea and the positive anomalies underlying Central Europe inhibit upwelling along the Lithuanian–Latvian coast. Such pressure conditions, bring about the western airflow component. More constant western winds restrain the upwelling process and bring about normal thermal stratification of coastal waters. A detailed analysis allowed the recognition of two circulation types inhibiting coastal upwelling in the study area. They reveal dipole patterns of sea level pressure anomalies, but the two inhibiting patterns differ substantially in the intensities and locations of the pressure centres and in wind conditions.

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