PDA

View Full Version : Can any of you smartie-pants types explaine this?



StevenBauer
12-02-2013, 10:54 PM
https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-prn2/1424551_485683511543836_1901311430_n.jpg

Breakaway
12-02-2013, 10:59 PM
We have here a crossing sea; swells coming from two different directions.

Kevin

David G
12-02-2013, 11:05 PM
Does this happen to be the lee of an island?

SMARTINSEN
12-02-2013, 11:15 PM
Shallow water, and wave patterns accentuated by dikes built up.

Larks
12-02-2013, 11:17 PM
Obviously French.....therefore it can not be explained.........inconceivable!!!

Woxbox
12-02-2013, 11:19 PM
Fences for the fish farms.

DeniseO30
12-02-2013, 11:46 PM
Finally! Proof that the world is a patch work quilt in many shades of blue! Or someone's sub division for water front homes was surveyed at low tide...

PeterSibley
12-02-2013, 11:51 PM
Finally! Proof that the world is a patch work quilt in many shades of blue! Or someone's sub division for water front homes was surveyed at low tide...

That's been done here, underwater real estate .

darroch
12-03-2013, 12:10 AM
Fish weirs?
http://media.treehugger.com/assets/images/2013/12/google-earth-fishing-weir-photo.jpg.662x0_q100_crop-scale.jpg

johnno
12-03-2013, 12:18 AM
Have a look at Ile de Re in france..lighthouse at the western end. Most of the reports on the image say crossing waves from two different weather systems.

brucemoffatt
12-03-2013, 03:25 AM
Crossing waves, but not necessarily from two different weather systems. It is possible that one set of waves is the natural swell and the other is a set of reflected waves coming off a particularly regular surface. It would be unusual for it to be this regular, but it's possible.

PeterSibley
12-03-2013, 05:21 AM
Crossing waves, but not necessarily from two different weather systems. It is possible that one set of waves is the natural swell and the other is a set of reflected waves coming off a particularly regular surface. It would be unusual for it to be this regular, but it's possible.

I've seen surf like that but in far different amplitudes .

Brian Palmer
12-03-2013, 08:04 AM
Waves refracting around an island?

Benson Gray
12-03-2013, 08:53 AM
The Google maps images at http://goo.gl/maps/bsLdR and http://goo.gl/maps/JQKjp indicates that this is not all explained by fish weirs or dikes so it must be crossing wave systems.

Benson

Ian McColgin
12-03-2013, 09:06 AM
It's quite likely French because it's Cartesian.

I'm with the two wave system theory, especially since one set is running right against the local breeze of the moment. I've never seen and can't imagine reflected waves traveling the distance to be so regular and waves that have bent around land show a curve so I doubt it's either of those.

Canoe
12-03-2013, 11:53 AM
Wow! they have found ATLANTIS!!

Alan

outofthenorm
12-03-2013, 12:15 PM
Easy. Photoshop!

Peerie Maa
12-03-2013, 12:28 PM
Easy. Photoshop!

I agree.
I would not believe one wave train with a flat calm sea crossed by widely spaced single crests. Waves just do not do that. For there to be two. Nah.
If you zoom out of the map that Benson linked you will see another reason for those regular waves to be less than likely.

Gib Etheridge
12-03-2013, 12:38 PM
What intrigues me is the spacing. There should be about 7 times as many waves per square in each direction.I would go for the reflected waves if not for that, and what is that black thing extending out parallel to the ones coming in against the wind from the left. There's a little bit of the black showing over the tower as well.

The only logical explanation I can come up with is a man made grid just below the surface, but that wouldn't do it either, I don't think, maybe though. Maybe they bulldozed up a grid in the sand for bombing practice.

Maybe these are the latest refinement to crop circles.

paulf
12-03-2013, 01:07 PM
This is a result of a combination of wave reflection and refraction together. Wave parks for surfers generate Diamond pattern waves for body surfers. A place called the
" Wedge" in Calif naturally generates waves like this.

When I was with the PNNL Marine science lab we rented "WILD RIVERS" park in Orange County during the off season to run experiments. We could generate diamond pattern waves by staggering the air chambers timing and using reflection from the pool sides.

Dave Wright
12-03-2013, 01:09 PM
First I've heard of crossing cnoidal waves.

Ian McColgin
12-03-2013, 01:19 PM
One of the images Bensen thoughtfully cited shows a more diamond pattern. It appears that the most constant sets come off the Bay of Biscay from the west southwest, wide open water. In this pic we also have a set rolling down from the north northwest, more or less parallel to the general coastline but well out from it. I see no chance of reflected waves causing this phenomenon, though in the right place reflected waves could well produce a similar effect.

keyhavenpotterer
12-03-2013, 01:54 PM
Shoaling swells crossing at Phares des Baleines.

John B
12-03-2013, 01:59 PM
Shoaling swell crossing





zigactly. The shoals are very clear .
Why would anyone bother photoshopping something like that?

Jazzman
12-03-2013, 02:09 PM
Proof that, contrary to popular belief, the French really are square?

RFNK
12-03-2013, 03:41 PM
Could be a small swell coming in from the right and the wake of a ship coming in from the left. Both breaking in very shallow water. Converging swells around islands and reefs are very common but I've never seen such a square pattern.
Rick

Breakaway
12-03-2013, 03:43 PM
Could be a small swell coming in from the right and the wake of a ship coming in from the left. Both breaking in very shallow water. Converging swells around islands and reefs are very common but I've never seen such a square pattern.

Agree ion nit seeing such a pattern; then again, this is not a typical boat point of view. Its the POV of a bird.

Kevin

Ian McColgin
12-03-2013, 03:44 PM
Go to the second site Benson posted. There are a number of cool patterns that happen there depending upon the week's weather and the tide. Then this one will not seem so strange.

Peerie Maa
12-03-2013, 04:27 PM
D'you mean this
https://static.panoramio.com.storage.googleapis.com/photos/large/79875559.jpg
What this shows are a series of long swells running onto a flatish wave cut platform. The curves in the wave fronts are caused by diffraction over variations in depth where the wave cut surface is of a band of differing hardness rock. The swells get gradually steeper until they break as the platform gradually shallows, whereas the other image has many more crests of the same height as though the bottom were billiard table flat.

StevenBauer
12-03-2013, 06:46 PM
Thanks, Nick. I knew you'd be along eventually.

:D




Steven

adampet
12-03-2013, 11:08 PM
I've heard of square waves.....

adam

Redeye
12-04-2013, 12:36 AM
Crossing waves, but not necessarily from two different weather systems. It is possible that one set of waves is the natural swell and the other is a set of reflected waves coming off a particularly regular surface. It would be unusual for it to be this regular, but it's possible.

^+1

keyhavenpotterer
12-04-2013, 04:54 AM
http://static.panoramio.com/photos/large/25840098.jpg

http://www.hotel-labaronnie.com/usermedia/photo-634133289918466250-1.jpg?w=778

Western end of Ill de Re, France.

paulf
12-10-2013, 03:39 PM
Perhaps this?

http://hugefloods.com/LakeMissoula.html

peter radclyffe
12-10-2013, 04:40 PM
a breton quilt

paulf
12-11-2013, 11:12 AM
Correct! Camas Prairie. Ah darn, perhaps it was too easy...

When I was in college, I took a course on Pacific Northwest Geology. This was a favorite topic of study by many students.

Chip-skiff
12-11-2013, 02:16 PM
We sailed in conditions somewhat like that returning from Great Barrier Island, NZ to Auckland. We were sailing a 40-foot Gary Mull sloop, wind at force 6-7. The frequencies of the waves were unequal and the boat was really bucking and yawing and pitching. First time I was ever seasick enough to hang over the rail.

The Hauraki Gulf is open to a strong swell off the open Pacific and there are large islands and mainland peninsulas that could deflect it.

Gerarddm
12-23-2013, 11:20 AM
In eastern WA, Dry Falls Park is a very cool place to visit to get a sense of the scale of the flood.

One can only imagine the roar of the waters. Must have been staggering, and literally earth-shaking.

paulf
12-23-2013, 12:51 PM
In eastern WA, Dry Falls Park is a very cool place to visit to get a sense of the scale of the flood.

One can only imagine the roar of the waters. Must have been staggering, and literally earth-shaking.

That flood emptied to the Ocean Via the Columbia river. There are huge sediment waves on the Sea floor many miles out from the river mouth caused by that flood.

I'll bet it was damn impressive!

floatingkiwi
12-23-2013, 01:32 PM
A swell was generated from one particular place and drove a small regular swell a considerable distance across the ocean with a good length period between crests x 2.
I bet this place is at a point with two very long and opposite facing coastlines in each direction from here.

Steamboat
12-24-2013, 12:10 PM
Photoshop!?