The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform
Hemantha W. Wijesekera - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
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Fractal dimension as an indicator for Turbulent mixing in the thermocline
Journal of Geophysical Research: Oceans, 1996Co-Authors: Hemantha W. WijesekeraAbstract:The complexity of small-scale density fluctuations is investigated experimentally, with special emphasis on their scale-similar (fractal) facets. Using empirical observations, it is shown that the fractal dimension of density at scales between 0.1 and 3 m is closely related to the Turbulent Kinetic Dissipation rate e, the local buoyancy frequency N, and the buoyancy Reynolds number e/νN2 in the upper equatorial Pacific thermocline.
Sally J Warner - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
Ewa Jarosz - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
Diane B. Fribance - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
James N. Moum - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
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Measurements of Form and Frictional Drags over a Rough Topographic Bank
Journal of Physical Oceanography, 2014Co-Authors: Hemantha W. Wijesekera, Ewa Jarosz, Diane B. Fribance, James N. Moum, David W. Wang, William J. Teague, Sally J WarnerAbstract:Pressuredifferencesacrosstopographygenerateaform dragthatopposestheflow in the watercolumn,and viscous and pressureforcesacting on roughnesselements of the topographic surface generatea frictionaldrag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank (EFGB) in the Gulf of Mexico by combining an array of bottom pressure measurements and profiles of velocity and Turbulent Kinetic Dissipation rates. The EFGB is a coral bank about 6km wide and 10km long located at the shelf edge that rises from 100-m water depth to about 18m below the sea surface. The average frictional drag coefficient over the entire bank was estimated as 0.006 using roughness lengths that ranged from 0.001cm for relatively smooth portions of the bank to 1‐10cm for very rough portions over the corals. The measured form drag over the bank showed multiple time-scale variability. Diurnal tides and lowfrequency motions with periods ranging from 4 to 17 days generated form drags of about 2000Nm 21 with average drag coefficients ranging between 0.03 and 0.22, which are a factor of 5‐35 times larger than the average frictional drag coefficient. Both linear wave and quadratic drag laws have similarities with the observed form drag. The form dragis an important flow retardation mechanismevenin the presence of the large frictional drag associated with coral reefs and requires parameterization.
