1 Ocak 2024 Dergi makalesi Açık Erişim

Cokacar, Tulay; Altiok, Husne; Mutlu, Sabri; Yuksek, Ahsen; Ediger, Dilek; Partal, Fatma Bayram

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    <subfield code="a">&lt;p&gt;In December 2021 and March 2022, synoptic-scale weather systems triggered blockages in the &amp;amp; Idot;stanbul Strait, resulting in a notable alteration of the water dynamics of the upper layer of the northeastern Marmara Sea. The blockages resulted in the disruption of water mass exchanges between &amp;amp; Idot;zmit Bay and the eastern Marmara basin, driven by intensified hydrodynamic forces and severe wind conditions. The blockage of the two-layer flow in the strait led to an intensification of upper layer dynamics, resulting in an elevation of nutrient levels through mixing with nutrient-rich lower waters and/or the redistribution of nutrient fluxes via an enhanced jet current. This study demonstrates the occurrence of rapid changes in the biochemical structure of &amp;amp; Idot;zmit Bay, as evidenced by Acostic Poppler Current Profiler (ADCP) measurements and near-weekly temperature and salinity profiles. The analyses demonstrate significant shifts in flow dynamics, with salinity serving as an indicator of enhanced mixing. This mixing enabled the transport of nutrient-rich deep waters to the upper productive layer, thereby stimulating increased biological activity. The findings highlight that the altered dynamics resulted in a notable surge in nutrient concentrations and biochemical activity, potentially fostering the expansion of mucilage-forming species in &amp;amp; Idot;zmit Bay.&lt;/p&gt;</subfield>
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    <subfield code="a">Alterations of the Physical and Biochemical Structure in the İzmit Bay Following the Blockage Events at the İstanbul Strait</subfield>
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