2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles
Profiles of absolute velocity are difficult to obtain in the ocean, especially over long periods of time at the same location. This paper presents a method of estimating full water column absolute horizontal velocity profiles as a function of time by combining historical hydrography with the measure...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.556.7999 2023-05-15T18:25:31+02:00 2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles Christopher S. Meinen Douglas S. Luther D. Randolph Watts Karen L. Tracey Alan D. Chave James Richman The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.556.7999 http://www.po.gso.uri.edu/dynamics/SAF/JTECH_Meinen.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.556.7999 http://www.po.gso.uri.edu/dynamics/SAF/JTECH_Meinen.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.po.gso.uri.edu/dynamics/SAF/JTECH_Meinen.pdf text ftciteseerx 2016-01-08T11:49:00Z Profiles of absolute velocity are difficult to obtain in the ocean, especially over long periods of time at the same location. This paper presents a method of estimating full water column absolute horizontal velocity profiles as a function of time by combining historical hydrography with the measurements from two separate instruments, the inverted echo sounder (IES) and the horizontal electric field recorder (HEFR). Hydrography is used to construct temperature, salinity, and specific volume anomaly characteristics as functions of the independent variables pressure and seafloor-to-sea-surface round-trip acoustic travel time (t). Each IES measured t is com-bined with these two-dimensional characteristics to estimate the profile of specific volume anomaly, which then is integrated vertically to obtain profiles of geopotential height anomaly (Df). Profiles of Df from adjacent IES sites are differenced to yield vertical profiles of relative geostrophic velocity. Horizontal electric fields arising from the vertically averaged horizontal water velocity provide the requisite referencing of the IES-derived relative velocities. Comparisons are presented between HEFR1IES absolute velocities in the Southern Ocean near 518S, 143.58E and absolute velocities determined via hydrography, acoustic Doppler current profiler, and current meter. 1. Text Southern Ocean Unknown Southern Ocean |
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Profiles of absolute velocity are difficult to obtain in the ocean, especially over long periods of time at the same location. This paper presents a method of estimating full water column absolute horizontal velocity profiles as a function of time by combining historical hydrography with the measurements from two separate instruments, the inverted echo sounder (IES) and the horizontal electric field recorder (HEFR). Hydrography is used to construct temperature, salinity, and specific volume anomaly characteristics as functions of the independent variables pressure and seafloor-to-sea-surface round-trip acoustic travel time (t). Each IES measured t is com-bined with these two-dimensional characteristics to estimate the profile of specific volume anomaly, which then is integrated vertically to obtain profiles of geopotential height anomaly (Df). Profiles of Df from adjacent IES sites are differenced to yield vertical profiles of relative geostrophic velocity. Horizontal electric fields arising from the vertically averaged horizontal water velocity provide the requisite referencing of the IES-derived relative velocities. Comparisons are presented between HEFR1IES absolute velocities in the Southern Ocean near 518S, 143.58E and absolute velocities determined via hydrography, acoustic Doppler current profiler, and current meter. 1. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Christopher S. Meinen Douglas S. Luther D. Randolph Watts Karen L. Tracey Alan D. Chave James Richman |
spellingShingle |
Christopher S. Meinen Douglas S. Luther D. Randolph Watts Karen L. Tracey Alan D. Chave James Richman 2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
author_facet |
Christopher S. Meinen Douglas S. Luther D. Randolph Watts Karen L. Tracey Alan D. Chave James Richman |
author_sort |
Christopher S. Meinen |
title |
2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
title_short |
2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
title_full |
2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
title_fullStr |
2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
title_full_unstemmed |
2002: Combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
title_sort |
2002: combining inverted echo sounder and horizontal electric field recorder measurements to obtain absolute velocity profiles |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.556.7999 http://www.po.gso.uri.edu/dynamics/SAF/JTECH_Meinen.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
http://www.po.gso.uri.edu/dynamics/SAF/JTECH_Meinen.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.556.7999 http://www.po.gso.uri.edu/dynamics/SAF/JTECH_Meinen.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766207029797453824 |