It depends were you stand..... by neiwil
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Description
My recent post 'On the waterfront' led to some correspondence with regards the tidal range of the Mersey.Well if I'm honest "it beats me"..the water rises and falls and is called High Tide or Low Tide.Taking pictures at Low Tide is a lot drier and that's about the sum of my Oceanographic knowledge.The above image is the best explanation I can give...when the tide is in you don't want to be stood next to one of these posts :-) You could get some interesting photos from on top of one...probably of the Coast Guard racing up to arrest you :-) Makes me wonder though, WHERE does all the water go ???
Comments (18)
Maxidyne
Beats the hell outta me where it all goes mate. One things for sure, the water looks a lot cleaner when it's out. To think as kids we used to swim in this on summer holidays!!! Next post we expect...no demand to see you standing on that at high tide :)
coyoteviper
fantastic. the high tide looks a little rough.
Richardphotos
you explained as good as anyone.my understanding , it simply raises and lowers according to gravity tug of the moon.when I was a child I had no idea what tide was except for laundry soap
bmac62
Well said Neil. Hey, I picture the Atlantic to be like a big bathtub...when it is up in the Mersey...it is down in the Hudson (New York). When up in the Hudson...it is down in the Mersey. Not in the least scientific but why else would there be a big yellow rubber ducky half way across? :-D
auntietk
At 4 metres (13.1 ft) neap tide to 10 metres (32.8 ft) spring tide, the River Mersey has the second highest tidal range in Britain – second only to the River Severn. (From the Wiki on the River Mersey) Doesn't anyone ever look anything up any more? Honestly. What IS this world coming to? :D Great shots showing the difference, my dear. Wonderful presentation!
UVDan
Quite the illustrative sequence.
Froggy
LOL Neil, excellent demonstration of the mersey tidal effect! With a planet's surface area like ours a few feet of water displacement across the whole is no big deal! Good to see you have time for some photos mate - will be getting out soon with my camera too I hope!!
blinkings
Gee mate that is severe! What a great contrast. As to where the water goes......the Earth is egg shaped rather than round. It’s squashed outwards round the middle, as if someone is pinching it with a giant thumb and finger at each pole. But in fact, it isn’t being squashed at all. It’s being stretched out of shape by tidal force, which in turn, forces the sea in and out. The tidal force is the Earth being pulled out of shape by the Moon and, to a lesser extent, by the Sun.
Rainastorm
Wow super cool demonstration. My Oceanographic knowledge is squat also...I live about 60 miles from the Ocean to so...oh well lol Super post!
android65mar
Over the other side of the planet if Prof Brian Cox (he of the teeth) is to be believed. Again, struck by the similarities to Southampton, which is also a tidal estuary. Great pictures
flavia49
fabulous collage
preeder
Wet feet and other things could be the order of the day if you are stood in the wrong place and the wrong time. Nicely put together mate.
T.Rex
Nice pair of photos, Neil. These really give a good indication of how great the tidal change is from flow to ebb. As you say, it depends on where you stand. At low tide, on the beach, at high tide, well, better be higher up, which means a bit further away. As for where the water goes - I once heard a little child explain it this way - there's a giant cork in the bottom, and a sea giant pulls it out when too much water flows in. However, you've got a few very good explanations here. I think the extreme flow/ebb is due to the pressure of the water flowing into an estuary, as the channel narrows, the volume of water only has one direction it can go - up. And hence the extreme tides. The high tide also has wind in the picture - and this can really drive water forewards. I sure would NOT like to stand on that post, even in low tide - looks slippery and full of barnacles (Ouch! They're sharp!). I really love the comment on "interesting photos, like the coast guard..." Keep up the good work! :-) Thanks for comments on my posts! I was unaware of a fleet mutiny 1931. I'll have to look that up! Glad my photo brought up the memories! I will post some more.
debbielove
The River Seven has such a strong tidal surge on occasion its known as the Seven Bore.. And you can surf on it! But they advise you not to as it is very much more dangerous than real surfing! Great shots Neil.. and great info.. And Tara? I don't know why people don't look things up any more ;-) Rob
Fidelity2
Cool. Very cool. I thank you very much for this one. I hope to see more from you. 5+!
fly028
Great photos..... and very nice story..and comments!! Have a good Week end!
Osper
It's pure physics. Somewhere there's a big bowl with lots of water. At the appointed time it's poured out and.....then....... ;) any way; that's neat the way you got the pair of shots.
kjer_99
Well, really, Neil! It goes somewhere! So there! Heh! Okay, okay. That's not too specific. I admit it. How's this? It goes someplace ELSE. So now you know. Excuse me. I've got to run. The tide's comin' in!