 |
| Titel |
Influence of winds on temporally varying short and long period gravity waves in the near shore regions of the eastern Arabian Sea |
| VerfasserIn |
J. Glejin, V. Sanil Kumar, T. M. Balakrishnan Nair, J. Singh |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1812-0784
|
| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 9, no. 2 ; Nr. 9, no. 2 (2013-03-20), S.343-353 |
| Datensatznummer |
250018040
|
| Publikation (Nr.) |
 copernicus.org/os-9-343-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| Wave data collected off Ratnagiri, west coast of India, during 1 May 2010 to
30 April 2012 are used in this study. Seasonal and annual variations in wave
data controlled by the local wind system such as sea breeze and land breeze,
and remote wind generated long period waves are also studied. The role of sea
breeze on the sea state during pre- and postmonsoon seasons is studied and it
is found that the maximum wave height is observed at 15:00 UTC during the
premonsoon season, with an estimated difference in time lag of 1–2 h in
maximum wave height between premonsoon and postmonsoon seasons. Observed
waves are classified in to (i) short waves (Tp < 8 s), (ii)
intermediate waves (8 < Tp < 13 s), and (iii) long waves
(Tp> 13 s) based on peak period (Tp) and the
percentages of occurrence of each category are estimated. Long period waves
are observed mainly during the pre- and the postmonsoon seasons. During the
southwest monsoon period, the waves with period > 13 s are a minimum. An
event during 2011 is identified as swells propagated from the Southern Ocean
with an estimated travelling time of 5–6 days. The swells reaching the
Arabian Sea from the south Indian Ocean and Southern Ocean, due to storms
during the pre- and postmonsoon periods, modify the near surface winds due to
higher phase wave celerity than the wind speed. Estimation of inverse wave
age using large-scale winds such as NCEP (National Centers for Environmental Prediction) reflects the presence of cyclonic
activity during pre- and postmonsoon seasons but not the effect of the local sea
breeze/land breeze wind system. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|