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Modelling of sea surface current and cirulation from satellite altimetry and ancillary data

Altimeter data from Jason-1 satellite are very useful in providing general and continuous information about the ocean, including sea surface currents. The main objective of study is to identify the most appropriate mathematical equation for determining sea surface current in the South China Sea. The...

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Main Author: Idris, Nurul Hazrina
Format: Thesis
Language:English
Published: 2008
Subjects:
GC Oceanography
Online Access:http://eprints.utm.my/id/eprint/36214/1/NurulHazrinaIdrisMFGHT2008.pdf
http://eprints.utm.my/id/eprint/36214/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85231?queryType=vitalDismax&query=Modelling+of+sea+surface+current+and+cirulation+from+satellite+altimetry+and+ancillary+data&public=true
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spelling my.utm.362142018-07-25T08:06:33Z http://eprints.utm.my/id/eprint/36214/ Modelling of sea surface current and cirulation from satellite altimetry and ancillary data Idris, Nurul Hazrina GC Oceanography Altimeter data from Jason-1 satellite are very useful in providing general and continuous information about the ocean, including sea surface currents. The main objective of study is to identify the most appropriate mathematical equation for determining sea surface current in the South China Sea. The seasonal changes of surface current during different monsoon periods in 2004 and 2005 were also identified. The equations used to derive sea surface current are geostrophic current equations, wind-driven current equations and tidal current equations. The methodology of this study involves the use of sea level height and sea surface wind speed data from Jason-1 satellite altimeter to derive geostrophic current and wind-driven current. Tidal amplitudes from co-tidal charts were used to derive tidal current. The derived surface currents were used to produce combined geostrophic and wind-driven current. Combined geostrophic and tidal current as well as total surface current which is the combination of geostrophic current, wind-driven current and tidal current were also derived. Maps of total surface current circulation pattern were produced during four monsoon periods in 2004 and 2005. Regression analysis and comparison of mean and standard deviation values with sea truth data were carried out to identify the most appropriate equation of surface current for the South China Sea. Results of the analysis indicate that total surface current speed and direction have good correlation with the sea truth data, that is 0.68 and 0.70 respectively. The analysis by comparing the mean values indicate that there are no significant difference between the means of total surface current and the means of sea truth data. The standard deviations of total surface current are smaller compared to the sea truth data values. In conclusion, altimeter data from Jason-1 satellite combined with tidal data to derive the total surface current is appropriate to determine sea surface current circulation pattern in the South China Sea. 2008 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/36214/1/NurulHazrinaIdrisMFGHT2008.pdf Idris, Nurul Hazrina (2008) Modelling of sea surface current and cirulation from satellite altimetry and ancillary data. Masters thesis, Universiti Teknologi Malaysia, Faculty of Geoinformation Science and Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85231?queryType=vitalDismax&query=Modelling+of+sea+surface+current+and+cirulation+from+satellite+altimetry+and+ancillary+data&public=true
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic GC Oceanography
spellingShingle GC Oceanography
Idris, Nurul Hazrina
Modelling of sea surface current and cirulation from satellite altimetry and ancillary data
description Altimeter data from Jason-1 satellite are very useful in providing general and continuous information about the ocean, including sea surface currents. The main objective of study is to identify the most appropriate mathematical equation for determining sea surface current in the South China Sea. The seasonal changes of surface current during different monsoon periods in 2004 and 2005 were also identified. The equations used to derive sea surface current are geostrophic current equations, wind-driven current equations and tidal current equations. The methodology of this study involves the use of sea level height and sea surface wind speed data from Jason-1 satellite altimeter to derive geostrophic current and wind-driven current. Tidal amplitudes from co-tidal charts were used to derive tidal current. The derived surface currents were used to produce combined geostrophic and wind-driven current. Combined geostrophic and tidal current as well as total surface current which is the combination of geostrophic current, wind-driven current and tidal current were also derived. Maps of total surface current circulation pattern were produced during four monsoon periods in 2004 and 2005. Regression analysis and comparison of mean and standard deviation values with sea truth data were carried out to identify the most appropriate equation of surface current for the South China Sea. Results of the analysis indicate that total surface current speed and direction have good correlation with the sea truth data, that is 0.68 and 0.70 respectively. The analysis by comparing the mean values indicate that there are no significant difference between the means of total surface current and the means of sea truth data. The standard deviations of total surface current are smaller compared to the sea truth data values. In conclusion, altimeter data from Jason-1 satellite combined with tidal data to derive the total surface current is appropriate to determine sea surface current circulation pattern in the South China Sea.
format Thesis
author Idris, Nurul Hazrina
author_facet Idris, Nurul Hazrina
author_sort Idris, Nurul Hazrina
title Modelling of sea surface current and cirulation from satellite altimetry and ancillary data
title_short Modelling of sea surface current and cirulation from satellite altimetry and ancillary data
title_full Modelling of sea surface current and cirulation from satellite altimetry and ancillary data
title_fullStr Modelling of sea surface current and cirulation from satellite altimetry and ancillary data
title_full_unstemmed Modelling of sea surface current and cirulation from satellite altimetry and ancillary data
title_sort modelling of sea surface current and cirulation from satellite altimetry and ancillary data
publishDate 2008
url http://eprints.utm.my/id/eprint/36214/1/NurulHazrinaIdrisMFGHT2008.pdf
http://eprints.utm.my/id/eprint/36214/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85231?queryType=vitalDismax&query=Modelling+of+sea+surface+current+and+cirulation+from+satellite+altimetry+and+ancillary+data&public=true
_version_ 1643649926364659712
score 13.211869

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