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 How to predict a sea breeze...

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kelv

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Posts : 253
Join date : 2010-08-06
Age : 41
Location : swansea

PostSubject: How to predict a sea breeze...   Wed Sep 05, 2012 5:04 am

As is always the case when we get a high pressure over the UK, sunshine and no predicted wind I start thinking about the mythical creature that is the ‘sea breeze’. I know (I think) the basic principle which causes these, that is, that the land heats up, the air above the land rises and the cold air off the sea rushes in to replace this – thus you get these when there is a relatively large difference between the temperature of the land and the temperature of the sea.

Using this knowledge and applying a little bit of logic I have come up with the following observations/questions regarding sea breezes on the beaches that we use in south wales to try to increase our chances of predicting when we might get a sea breeze....

1) You are most likely to get sea breezes from late morning to early afternoon once the land has warmed up and before it starts to cool down.
2) You are obviously less likely to get sea breezes when there is any cloud as this stops the land from heating up.
3) Are you most likely to get sea breezes in early summer since the sea is cooler then?
4) Are you less likely to get sea breezes on beaches with large tidal ranges for two reasons?
a. If the sea is a long way out, it is a long way from the hotter land and so the temperature ‘gradient’ is less.
b. The water is very shallow over a large area hence warms up, so is not significantly colder that the land.
5) Are you more likely to get sea breezes where there is a large land mass directly behind the beach which warms up. For example, Aber has a nice large concrete council estate just behind the beach and rest bay has cliffs directly behind the beach which warm up, hence the chances of sea breezes here increases. The flip side to this is say Gennith which has grassy sand dunes which do not heat up as much.
6) Are you less likely to get a sea breeze at say rest, when low tide coincides with mid afternoon and the water is a long way from the land mass behind the beach?
7) Are you more likely to get a sea breeze on an advancing tide as the water is slightly colder? Once the tide is retreating is has been sat on the warm sand for a couple of hours and thus has heated up slightly.

Thoughts/observations on the above? Any other tips on when/where we might get a sea breeze?

Kelv
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Mr Bobby

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PostSubject: Re: How to predict a sea breeze...   Fri Sep 07, 2012 4:43 pm

Wow kelv some good questions. Hopefully some experience seabreezers can help. You are like the sherlock holmes of sea breeze observation
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maui

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PostSubject: Re: How to predict a sea breeze...   Fri Sep 07, 2012 8:03 pm

Someone put a possibility to us of why we haven't had sea breezes lately and it was the same last year, we didn't get them aswell as earlier in the year, because the sea is at it's warmest now and there isn't enough differentiation in the temperatures of the land and sea.
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alunj

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Age : 53
Location : The Sea

PostSubject: Re: How to predict a sea breeze...   Sun Sep 09, 2012 4:13 am

Aber also has a dirty great steel works that adds 1-2c to the local temp

but rest sometimes gets a better sea breeze when there is a nw component to it, the wind comes parallel to beach at Aber and is drawn in over Bridgend and the vale causing it to be strong at rest.
the book I have does refer to mudflats and tidal effects I will re read that.
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kelv

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Join date : 2010-08-06
Age : 41
Location : swansea

PostSubject: Re: How to predict a sea breeze...   Sun Sep 09, 2012 7:41 am

Cheers aj...let us know what it says......any info which increases our chances of predicting these would be good!
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