Swell Propagation over Indian Ocean Region
Swells are the ocean surface gravity waves that have propagated out of their generating fetch to the distant coasts without significant attenuation. Therefore they contain a clear signature of the nature and intensity of wind at the generation location. This makes them a precursor to various atmosph...
Published in: | The International Journal of Ocean and Climate Systems |
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Online Access: | http://dx.doi.org/10.1260/1759-3131.2.2.87 http://journals.sagepub.com/doi/pdf/10.1260/1759-3131.2.2.87 |
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crsagepubl:10.1260/1759-3131.2.2.87 2023-05-15T18:25:13+02:00 Swell Propagation over Indian Ocean Region Bhowmick, Suchandra A. Kumar, Raj Chaudhuri, Sutapa Sarkar, Abhijit 2011 http://dx.doi.org/10.1260/1759-3131.2.2.87 http://journals.sagepub.com/doi/pdf/10.1260/1759-3131.2.2.87 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The International Journal of Ocean and Climate Systems volume 2, issue 2, page 87-99 ISSN 1759-3131 1759-314X journal-article 2011 crsagepubl https://doi.org/10.1260/1759-3131.2.2.87 2022-09-21T19:49:58Z Swells are the ocean surface gravity waves that have propagated out of their generating fetch to the distant coasts without significant attenuation. Therefore they contain a clear signature of the nature and intensity of wind at the generation location. This makes them a precursor to various atmospheric phenomena like distant storms, tropical cyclones, or even large scale sea breeze like monsoon. Since they are not affected by wind once they propagate out of their generating region, they cannot be described by regional wave models forced by local winds. However, their prediction is important, in particular, for ship routing and off shore structure designing. In the present work, the propagation of swell waves from the Southern Ocean and southern Indian Ocean to the central and northern Indian Ocean has been studied. For this purpose a spectral ocean Wave Model (WAM) has been used to simulate significant wave height for 13 years from 1993–2005 using NCEP blended winds at a horizontal spatial resolution of 1° × 1°. It has been observed that Indian Ocean, with average wave height of approximately 2–3 m during July, is mostly dominated by swell waves generated predominantly under the extreme windy conditions prevailing over the Southern Ocean and southern Indian Ocean. In fact the swell waves reaching the Indian Ocean in early or mid May carry unique signatures of monsoon arriving over the Indian Subcontinent. Pre-monsoon month of April contains low swell waves ranging from 0.5–1 m. The amplitudes subsequently increase to approximately 1.5–2 meters around 7–15 days prior to the arrival of monsoon over the Indian Subcontinent. This embedded signature may be utilized as one of the important oceanographic precursor to the monsoon onset over the Indian Ocean. Article in Journal/Newspaper Southern Ocean SAGE Publications (via Crossref) Indian Southern Ocean The International Journal of Ocean and Climate Systems 2 2 87 99 |
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Open Polar |
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SAGE Publications (via Crossref) |
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crsagepubl |
language |
English |
description |
Swells are the ocean surface gravity waves that have propagated out of their generating fetch to the distant coasts without significant attenuation. Therefore they contain a clear signature of the nature and intensity of wind at the generation location. This makes them a precursor to various atmospheric phenomena like distant storms, tropical cyclones, or even large scale sea breeze like monsoon. Since they are not affected by wind once they propagate out of their generating region, they cannot be described by regional wave models forced by local winds. However, their prediction is important, in particular, for ship routing and off shore structure designing. In the present work, the propagation of swell waves from the Southern Ocean and southern Indian Ocean to the central and northern Indian Ocean has been studied. For this purpose a spectral ocean Wave Model (WAM) has been used to simulate significant wave height for 13 years from 1993–2005 using NCEP blended winds at a horizontal spatial resolution of 1° × 1°. It has been observed that Indian Ocean, with average wave height of approximately 2–3 m during July, is mostly dominated by swell waves generated predominantly under the extreme windy conditions prevailing over the Southern Ocean and southern Indian Ocean. In fact the swell waves reaching the Indian Ocean in early or mid May carry unique signatures of monsoon arriving over the Indian Subcontinent. Pre-monsoon month of April contains low swell waves ranging from 0.5–1 m. The amplitudes subsequently increase to approximately 1.5–2 meters around 7–15 days prior to the arrival of monsoon over the Indian Subcontinent. This embedded signature may be utilized as one of the important oceanographic precursor to the monsoon onset over the Indian Ocean. |
format |
Article in Journal/Newspaper |
author |
Bhowmick, Suchandra A. Kumar, Raj Chaudhuri, Sutapa Sarkar, Abhijit |
spellingShingle |
Bhowmick, Suchandra A. Kumar, Raj Chaudhuri, Sutapa Sarkar, Abhijit Swell Propagation over Indian Ocean Region |
author_facet |
Bhowmick, Suchandra A. Kumar, Raj Chaudhuri, Sutapa Sarkar, Abhijit |
author_sort |
Bhowmick, Suchandra A. |
title |
Swell Propagation over Indian Ocean Region |
title_short |
Swell Propagation over Indian Ocean Region |
title_full |
Swell Propagation over Indian Ocean Region |
title_fullStr |
Swell Propagation over Indian Ocean Region |
title_full_unstemmed |
Swell Propagation over Indian Ocean Region |
title_sort |
swell propagation over indian ocean region |
publisher |
SAGE Publications |
publishDate |
2011 |
url |
http://dx.doi.org/10.1260/1759-3131.2.2.87 http://journals.sagepub.com/doi/pdf/10.1260/1759-3131.2.2.87 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
The International Journal of Ocean and Climate Systems volume 2, issue 2, page 87-99 ISSN 1759-3131 1759-314X |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1260/1759-3131.2.2.87 |
container_title |
The International Journal of Ocean and Climate Systems |
container_volume |
2 |
container_issue |
2 |
container_start_page |
87 |
op_container_end_page |
99 |
_version_ |
1766206506908254208 |