eastern region oil spill disaster contingency plan - Indian Coast Guard
eastern region oil spill disaster contingency plan - Indian Coast Guard
eastern region oil spill disaster contingency plan - Indian Coast Guard
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51. North East Monsoon Season. The period from October to<br />
December is termed as the ‘Post Monsoon Season". It is also known as the '<br />
North East Monsoon Season". There are no well established criteria for declaring<br />
the outset of NE Monsoon. However a sudden increase in rainfall activity along<br />
Andhra and Tamil Nadu coast by about middle of October and reversal of surface<br />
wind form SWly to NNEly are generally considered as the general criteria of<br />
setting of the NE Monsoon. During the first week of September the South West<br />
Monsoon starts withdrawing from the extreme northern and north - western<br />
parts of the country, between second half of September and first half of October<br />
it withdraws from the entries northern, North-Western most parts of central and<br />
Northern parts of peninsular India. When the Southwesterly winds retreat<br />
southwards down the Bay of Bengal, they are replaced by winds from the<br />
Northeasterly and while withdrawing the Monsoon gives considerable rainfall to<br />
the South Peninsula and for this reason the period from October to December is<br />
also known as the retreating Monsoon Season.<br />
52. During this season Mean Sea Level Pressure, Surface Air temperature and<br />
Upper wind circulation patterns over the <strong>Indian</strong> Sub continent and the <strong>Indian</strong><br />
seas undergo rapid changes from the summer type to the winter type. The<br />
month of October is considered as the transitional period between Monsoons.<br />
This month is also considered as the representative month of this reason. During<br />
this period, the seasonal Low pressure is of South West Monsoon Season over<br />
North West India becomes unimportant. A shallow Low pressure Area appears<br />
over west Central and adjoining South West oriented trough line through this<br />
seasonal Low pressure area from Bay of Bengal to the Arabian Sea across the<br />
land areas in noticed. The seasonal Low-pressure area and the associated trough<br />
line shifts southerly as the NE Monsoon Season progresses. Most of the Low<br />
Pressure Areas/ Depressions develop in Bay of Bengal over the East-West<br />
oriented trough.<br />
53. Rain fall and Surface winds. During this season the south<br />
peninsular India Comprising the Meteorological sub divisions of coastal Andhra<br />
Pradesh, Rayalaseema, Tamil Nadu and Kerala experiences significant rainfall.<br />
The southern peninsula particularly the Meteorological subdivisions along the<br />
East <strong>Coast</strong> namely <strong>Coast</strong>al Andhra Pradesh and Tamil Nadu get considerable<br />
amounts of rainfall of the year during this season. For the state of Tamil Nadu<br />
this is the main rainfall season. This rainfall in the beginning of the season