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Multi-layered stratification in the Baltic Sea: Insight from a modeling study with reference to environmental conditions
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Hydraulic Engineering.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2017 (English)In: Journal of Marine Science and Engineering, E-ISSN 2077-1312, Vol. 5, no 1, article id 2Article in journal (Refereed) Published
Abstract [en]

The hydrodynamic and transport characteristics of the Baltic Sea in the period 2000-2009 were studied using a fully calibrated and validated 3D hydrodynamic model with a horizontal resolution of 4.8 km. This study provided new insight into the type and dynamics of vertical structure in the Baltic Sea, not considered in previous studies. Thermal and salinity stratification are both addressed, with a focus on the structural properties of the layers. The detection of cooler regions (dicothermal) within the layer structure is an important finding. The detailed investigation of thermal stratification for a 10-year period (i.e., 2000-2009) revealed some new features. A multilayered structure that contains several thermocline and dicothermal layers was identified from this study. Statistical analysis of the simulation results made it possible to derive the mean thermal stratification properties, expressed as mean temperatures and the normalized layer thicknesses. The three-layered model proposed by previous investigators appears to be valid only during the winter periods; for other periods, a multi-layered structure with more than five layers has been identified during this investigation. This study provides detailed insight into thermal and salinity stratification in the Baltic Sea during a recent decade that can be used as a basis for diverse environmental assessments. It extends previous studies on stratification in the Baltic Sea regarding both the extent and the nature of stratification.

Place, publisher, year, edition, pages
MDPI AG , 2017. Vol. 5, no 1, article id 2
Keywords [en]
Baltic Sea, Dicothermal, GEMSS, Hydrodynamics, Modeling, Stratification, Vertical structure
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-216551DOI: 10.3390/jmse5010002ISI: 000423687800002Scopus ID: 2-s2.0-85029388827OAI: oai:DiVA.org:kth-216551DiVA, id: diva2:1155669
Note

QC 20171108

Available from: 2017-11-08 Created: 2017-11-08 Last updated: 2018-03-19Bibliographically approved

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Dargahi, BijanCvetkovic, Vladimir

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