Emin Özsoy | Middle East Technical University (original) (raw)
Papers by Emin Özsoy
Proceedings of SPIE - The International Society for Optical Engineering, 1997
Optical parameters of the Black Sea waters: long term variability and present status. [Proceeding... more Optical parameters of the Black Sea waters: long term variability and present status. [Proceedings of SPIE 2963, 560 (1997)]. Vladimir L. Vladimirov, Viktor I. Mankovsky, Mark V. Solov'ev, Alexey V. Mishonov, Sukru Besiktepe, Emin Ozsoy. Abstract. ...
Geophysical Fluid Dynamics I, 2020
Springer Textbooks in Earth Sciences, Geography and Environment, 2021
For a homogeneous and incompressible fluid, the (i) continuity (ii) momentum equations, are suffi... more For a homogeneous and incompressible fluid, the (i) continuity (ii) momentum equations, are sufficient to determine the flow. Since the fluid is incompressible, the density of a fluid particle should remain unchanged.
Geophysical Fluid Dynamics II, 2021
Based on developments in Chap. 2, it is possible to arrive at sets of governing equations unifyin... more Based on developments in Chap. 2, it is possible to arrive at sets of governing equations unifying GFD theory for the atmosphere and ocean, by appropriately defining the state variable s for each of these fluid domains.
Geophysical Fluid Dynamics I, 2020
We present a much idealized theory of jets and plumes in this chapter. Jet flows are very similar... more We present a much idealized theory of jets and plumes in this chapter. Jet flows are very similar to boundary layers considered in the last chapter. Free jets and wakes can be created away from solid boundaries by a momentum source, while buoyant plumes involve effects of density.
We have already derived the equation expressing the conservation of mass for a fluid in Sect. 2.6... more We have already derived the equation expressing the conservation of mass for a fluid in Sect. 2.6. The continuity equation can be written in either of the following two forms.
Lowland Technology International, 2014
Journal of Geophysical Research, 2003
Turkish Journal of Engineering and Environmental Sciences, 2006
The Rhodes Gyre, a prominent feature of the oceanography of the eastern Mediterranean, is modelle... more The Rhodes Gyre, a prominent feature of the oceanography of the eastern Mediterranean, is modelled as a vertical, continuous flow, cylindrical reactor illuminated during the day at its upper end. If the Gyre is supposed to be in a steady state whilst the concentrations, C, of a chemical are being measured, the nett rate of formation or consumption of the chemical is given by-wd C/dz+ ud C/dr, where w is the upward velocity of the water in the vertical, z, direction and u is the velocity of the water in the radial, r, direction. The behaviour of w and ...
Deep Sea Research Part I: Oceanographic Research Papers, 1993
A PICO presented at EGU18-OS4.1 on an Observing System Simulation Experiments in the Marmara Sea.... more A PICO presented at EGU18-OS4.1 on an Observing System Simulation Experiments in the Marmara Sea. The OSSE is performed to design and propose a ferrybox network in the eastern Marmara basin to observe temperature and salinity with high-frequency using existing ferry lines operating already in the basin.
Preoperational forecasting system in the TSS. Presented in #EGU18 OS2.2
Hydrodynamics of the Bosphorus Strait is examined with a three-dimensional ocean model under the ... more Hydrodynamics of the Bosphorus Strait is examined with a three-dimensional ocean model under the idealized conditions, while solving the full set of the primitive equations for the simplified hydrography and geometry of the strait. The response of the idealized model switching from one steady-state to another, from a less frictional case to a more frictional one or vice versa are investigated. The results show that the model is successful in switching from a less frictional state to a more frictional one, but has difficulties in the opposite direction. Inconsistency between the reservoir stratification partly defined by the initial condition and the maximal-exchange characteristic of the steady-state solution of the restarted simulation prevents a successful switch from a well-mixed case to a reduced mixing solution.
Journal of Physical Oceanography, 2018
The first in situ measurements of seawater density that referred to a geographical position at se... more The first in situ measurements of seawater density that referred to a geographical position at sea and time of the year were carried out by Count Luigi Ferdinando Marsili between 1679 and 1680 in the Adriatic Sea, Aegean Sea, Marmara Sea, and the Bosporus. Not only was this the first investigation with documented oceanographic measurements carried out at stations, but the measurements were described in such an accurate way that the authors were able to reconstruct the observations in modern units. These first measurements concern the “specific gravity” of seawaters (i.e., the ratio between fluid densities). The data reported in the historical oceanographic treatise Osservazioni intorno al Bosforo Tracio (Marsili) allowed the reconstruction of the seawater density at different geographic locations between 1679 and 1680. Marsili’s experimental methodology included the collection of surface and deep water samples, the analysis of the samples with a hydrostatic ampoule, and the use of a...
Mediterranean Marine Science, 2017
The Turkish Straits System (TSS) regulates the transports of water, material and energy between t... more The Turkish Straits System (TSS) regulates the transports of water, material and energy between the Black Sea and the Mediterranean Sea. Amidst existing environmental threats to the region surrounding İstanbul, the environmental footprint of the proposed Canal İstanbul project needs to be evaluated through methods of natural science. We take the elementary step to answer the particular problem of coupled strait dynamics by adding the Canal to an existing hydrodynamic model and estimate changes in their common response. Compared to the virtually unmodified exchange flow in the Bosphorus, the flow in the Canal has a weak lower layer current component, contrasted with intense currents at the exit controls at its junction with the Marmara Sea. The net flux through this simplest hypothetical TSS configuration is considerably increased for a given sea level difference across the system. The modified regime is expected to have climatological consequences.
Proceedings of SPIE - The International Society for Optical Engineering, 1997
Optical parameters of the Black Sea waters: long term variability and present status. [Proceeding... more Optical parameters of the Black Sea waters: long term variability and present status. [Proceedings of SPIE 2963, 560 (1997)]. Vladimir L. Vladimirov, Viktor I. Mankovsky, Mark V. Solov'ev, Alexey V. Mishonov, Sukru Besiktepe, Emin Ozsoy. Abstract. ...
Geophysical Fluid Dynamics I, 2020
Springer Textbooks in Earth Sciences, Geography and Environment, 2021
For a homogeneous and incompressible fluid, the (i) continuity (ii) momentum equations, are suffi... more For a homogeneous and incompressible fluid, the (i) continuity (ii) momentum equations, are sufficient to determine the flow. Since the fluid is incompressible, the density of a fluid particle should remain unchanged.
Geophysical Fluid Dynamics II, 2021
Based on developments in Chap. 2, it is possible to arrive at sets of governing equations unifyin... more Based on developments in Chap. 2, it is possible to arrive at sets of governing equations unifying GFD theory for the atmosphere and ocean, by appropriately defining the state variable s for each of these fluid domains.
Geophysical Fluid Dynamics I, 2020
We present a much idealized theory of jets and plumes in this chapter. Jet flows are very similar... more We present a much idealized theory of jets and plumes in this chapter. Jet flows are very similar to boundary layers considered in the last chapter. Free jets and wakes can be created away from solid boundaries by a momentum source, while buoyant plumes involve effects of density.
We have already derived the equation expressing the conservation of mass for a fluid in Sect. 2.6... more We have already derived the equation expressing the conservation of mass for a fluid in Sect. 2.6. The continuity equation can be written in either of the following two forms.
Lowland Technology International, 2014
Journal of Geophysical Research, 2003
Turkish Journal of Engineering and Environmental Sciences, 2006
The Rhodes Gyre, a prominent feature of the oceanography of the eastern Mediterranean, is modelle... more The Rhodes Gyre, a prominent feature of the oceanography of the eastern Mediterranean, is modelled as a vertical, continuous flow, cylindrical reactor illuminated during the day at its upper end. If the Gyre is supposed to be in a steady state whilst the concentrations, C, of a chemical are being measured, the nett rate of formation or consumption of the chemical is given by-wd C/dz+ ud C/dr, where w is the upward velocity of the water in the vertical, z, direction and u is the velocity of the water in the radial, r, direction. The behaviour of w and ...
Deep Sea Research Part I: Oceanographic Research Papers, 1993
A PICO presented at EGU18-OS4.1 on an Observing System Simulation Experiments in the Marmara Sea.... more A PICO presented at EGU18-OS4.1 on an Observing System Simulation Experiments in the Marmara Sea. The OSSE is performed to design and propose a ferrybox network in the eastern Marmara basin to observe temperature and salinity with high-frequency using existing ferry lines operating already in the basin.
Preoperational forecasting system in the TSS. Presented in #EGU18 OS2.2
Hydrodynamics of the Bosphorus Strait is examined with a three-dimensional ocean model under the ... more Hydrodynamics of the Bosphorus Strait is examined with a three-dimensional ocean model under the idealized conditions, while solving the full set of the primitive equations for the simplified hydrography and geometry of the strait. The response of the idealized model switching from one steady-state to another, from a less frictional case to a more frictional one or vice versa are investigated. The results show that the model is successful in switching from a less frictional state to a more frictional one, but has difficulties in the opposite direction. Inconsistency between the reservoir stratification partly defined by the initial condition and the maximal-exchange characteristic of the steady-state solution of the restarted simulation prevents a successful switch from a well-mixed case to a reduced mixing solution.
Journal of Physical Oceanography, 2018
The first in situ measurements of seawater density that referred to a geographical position at se... more The first in situ measurements of seawater density that referred to a geographical position at sea and time of the year were carried out by Count Luigi Ferdinando Marsili between 1679 and 1680 in the Adriatic Sea, Aegean Sea, Marmara Sea, and the Bosporus. Not only was this the first investigation with documented oceanographic measurements carried out at stations, but the measurements were described in such an accurate way that the authors were able to reconstruct the observations in modern units. These first measurements concern the “specific gravity” of seawaters (i.e., the ratio between fluid densities). The data reported in the historical oceanographic treatise Osservazioni intorno al Bosforo Tracio (Marsili) allowed the reconstruction of the seawater density at different geographic locations between 1679 and 1680. Marsili’s experimental methodology included the collection of surface and deep water samples, the analysis of the samples with a hydrostatic ampoule, and the use of a...
Mediterranean Marine Science, 2017
The Turkish Straits System (TSS) regulates the transports of water, material and energy between t... more The Turkish Straits System (TSS) regulates the transports of water, material and energy between the Black Sea and the Mediterranean Sea. Amidst existing environmental threats to the region surrounding İstanbul, the environmental footprint of the proposed Canal İstanbul project needs to be evaluated through methods of natural science. We take the elementary step to answer the particular problem of coupled strait dynamics by adding the Canal to an existing hydrodynamic model and estimate changes in their common response. Compared to the virtually unmodified exchange flow in the Bosphorus, the flow in the Canal has a weak lower layer current component, contrasted with intense currents at the exit controls at its junction with the Marmara Sea. The net flux through this simplest hypothetical TSS configuration is considerably increased for a given sea level difference across the system. The modified regime is expected to have climatological consequences.