Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective
The Indian Ocean has a unique geographic location that is not connected to the North Pole (blocked by the Asian Land mass at around 26°N) but it has a wide opening to the Antarctic Ocean. Therefore, the oceanic and atmospheric circulation of the Indian Ocean is significantly controlled by the proces...
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ftunivmalaysia:oai:generic.eprints.org:78529 2023-11-12T04:08:28+01:00 Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective Ranjan, Shenbakavalli 2016-08 application/pdf http://eprints.utm.my/78529/ http://eprints.utm.my/78529/1/ShenbakavalliRanjanMFGHT2016.pdf http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:95501 en eng http://eprints.utm.my/78529/1/ShenbakavalliRanjanMFGHT2016.pdf Ranjan, Shenbakavalli (2016) Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective. Masters thesis, Universiti Teknologi Malaysia, Faculty of Geoinformation and Real Estate. G70.212-70.215 Geographic information system Thesis NonPeerReviewed 2016 ftunivmalaysia 2023-10-24T17:58:55Z The Indian Ocean has a unique geographic location that is not connected to the North Pole (blocked by the Asian Land mass at around 26°N) but it has a wide opening to the Antarctic Ocean. Therefore, the oceanic and atmospheric circulation of the Indian Ocean is significantly controlled by the processes occurring in the Southern Ocean region. In this study, a comprehensive analysis was carried out to derive information of the spatial and temporal variability of surface circulation, and biological productivity of the Southern Indian Ocean using the available remote sensing observations. The monthly multi-mission merged satellite altimeter data with a resolution of 1/3 x 1/3 degrees in latitude and longitude from Archiving, Validation and Interpretation of Satellite Oceanographic Data, Collective Localisation Satellites; France (AVISO) for the period of 1993-2010 were used to estimate the surface currents in this study. The biological productivity was analysed using the Chlorophyll-a (Chl-a) data from Sea Viewing Wide Field-of-View Sensor (SeaWiFS) from September 1997 until December 2010. The maps of seasonal circulation patterns and the Chl-a distribution were prepared and analysed. The Empirical Orthogonal Function analysis was carried out to identify the spatial and temporal modes of Chl-a variability of Southern Indian Ocean. Available in-situ oceanographic observations of currents were used to validate the accuracy of the estimated velocity field. The surface velocity field in the Southern Indian Ocean shows active circulations comprising of Agulhas Current, Agulhas Return Current and Antarctic Circumpolar Current. The seasonal Chl-a maps show high Chl-a concentration prevails in the coastal region of Africa, central region and south of Australia. At south of Africa, influence of coastal current is more significant than the climatic indices. Meanwhile, in the central region, large topographic barriers near Kerguelen Island play an important role in modulating the Chl-a concentration. In south of Australia, ... Thesis Antarc* Antarctic Antarctic Ocean North Pole Southern Ocean Universiti Teknologi Malaysia: Institutional Repository Antarctic Southern Ocean The Antarctic Kerguelen Indian North Pole Antarctic Ocean Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) |
institution |
Open Polar |
collection |
Universiti Teknologi Malaysia: Institutional Repository |
op_collection_id |
ftunivmalaysia |
language |
English |
topic |
G70.212-70.215 Geographic information system |
spellingShingle |
G70.212-70.215 Geographic information system Ranjan, Shenbakavalli Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective |
topic_facet |
G70.212-70.215 Geographic information system |
description |
The Indian Ocean has a unique geographic location that is not connected to the North Pole (blocked by the Asian Land mass at around 26°N) but it has a wide opening to the Antarctic Ocean. Therefore, the oceanic and atmospheric circulation of the Indian Ocean is significantly controlled by the processes occurring in the Southern Ocean region. In this study, a comprehensive analysis was carried out to derive information of the spatial and temporal variability of surface circulation, and biological productivity of the Southern Indian Ocean using the available remote sensing observations. The monthly multi-mission merged satellite altimeter data with a resolution of 1/3 x 1/3 degrees in latitude and longitude from Archiving, Validation and Interpretation of Satellite Oceanographic Data, Collective Localisation Satellites; France (AVISO) for the period of 1993-2010 were used to estimate the surface currents in this study. The biological productivity was analysed using the Chlorophyll-a (Chl-a) data from Sea Viewing Wide Field-of-View Sensor (SeaWiFS) from September 1997 until December 2010. The maps of seasonal circulation patterns and the Chl-a distribution were prepared and analysed. The Empirical Orthogonal Function analysis was carried out to identify the spatial and temporal modes of Chl-a variability of Southern Indian Ocean. Available in-situ oceanographic observations of currents were used to validate the accuracy of the estimated velocity field. The surface velocity field in the Southern Indian Ocean shows active circulations comprising of Agulhas Current, Agulhas Return Current and Antarctic Circumpolar Current. The seasonal Chl-a maps show high Chl-a concentration prevails in the coastal region of Africa, central region and south of Australia. At south of Africa, influence of coastal current is more significant than the climatic indices. Meanwhile, in the central region, large topographic barriers near Kerguelen Island play an important role in modulating the Chl-a concentration. In south of Australia, ... |
format |
Thesis |
author |
Ranjan, Shenbakavalli |
author_facet |
Ranjan, Shenbakavalli |
author_sort |
Ranjan, Shenbakavalli |
title |
Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective |
title_short |
Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective |
title_full |
Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective |
title_fullStr |
Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective |
title_full_unstemmed |
Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective |
title_sort |
variability of surface circulation and biological productivity of southern indian ocean in remote sensing perspective |
publishDate |
2016 |
url |
http://eprints.utm.my/78529/ http://eprints.utm.my/78529/1/ShenbakavalliRanjanMFGHT2016.pdf http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:95501 |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Antarctic Southern Ocean The Antarctic Kerguelen Indian North Pole Antarctic Ocean Kerguelen Island |
geographic_facet |
Antarctic Southern Ocean The Antarctic Kerguelen Indian North Pole Antarctic Ocean Kerguelen Island |
genre |
Antarc* Antarctic Antarctic Ocean North Pole Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean North Pole Southern Ocean |
op_relation |
http://eprints.utm.my/78529/1/ShenbakavalliRanjanMFGHT2016.pdf Ranjan, Shenbakavalli (2016) Variability of surface circulation and biological productivity of Southern Indian Ocean in remote sensing perspective. Masters thesis, Universiti Teknologi Malaysia, Faculty of Geoinformation and Real Estate. |
_version_ |
1782328760918343680 |