WA
138 posts
Can anyone give a plausible answer as to why a sea breeze is a south westerly and not a westerly? As our coast line here in Perth WA generally runs North to South I would have thought the heating effect on the land would result in the incoming air(sea breeze) to be from the west? Any Meteorologists out there who can help? Thanks.
WA
4133 posts
Just my ideas, seabreese not always sw, but generally ssw, but can be sw, s, sse, and nw. My understanding is that the seabreeze is influenced by the pressure system that generates it, in most cases, that is a high pressure system, when the gradients and isobars align themselves with some south in there trajectory, and this combines with the thermal eefect of the land heating up and the temperature differential with the sea, then this creates a localised pressure efect and will accellerate the wind and bend it somewhat.
If the high pressure system as it moves across has a predominantly southerly flow, the we will normally get a very strong seabreeze with a lot of south in it, the more east the isobars of the high pressure system, generally the weaker the seabreweze particularly if north in it.
The other issue is that the higher north you go inland the hotter the temperature, therefore sucking the wind in a northerly direction, causing a southerly wind.
There's more to it, I'm too tired and lazy to write more, let others have a go. The trough is also an interesting feature which I'm trying to get my head around.
WA
23701 posts
Well here in Esperance it is SE or ESE. And no I won't tell you when it is best but I'll give you all a tip, it has to do with the High pressure cell, the trough, and a crystal ball hehehehehee
What I wanna know.... how come a seabreeze moves more cross shore later in the day? IE in Perth thru to Gero it goes more South and here it goes more East, making it a better ride. Hmmmmmmm
418 posts
Comrade Mark,
You very big tricker yar ?
For all Europeans reading this and wanting to coming to Australia for sailing, the wind is best from midday to 4 pm, then you must be getting out of the water and making yourself strong again for the next day.
This cross shore effect late in the day is big myth for sure yar.
No point hanging around and waiting for this... this is like waiting for tooth fairy.
Go back camp site and prepare for next day, laugh and joke with friends how good session was till 4pm yar
Maybe you sail later in Perth for sure yar... but in Esperance in south and Geraldton in north this cross shore not worth waiting for.
You must be of beleiving me, I from mother Russia, I not lie to you
Kremlin
