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View Full Version : Lat 00o 00'00" and Coriolis


J. Dillon
03-07-2004, 05:48 PM
http://www.imagestation.com/picture/sraid105/p06554fcf116e98373da5393b1d24072f/f97e2ebc.jpg
Johanna and JD on the line ( French version) Note the WB logo buckle

The start of our Equador Jungle, Galapagos adventure. A little history first.

In 1736, a French scientific expedition, the Mission Geodesica, traveled to this region of the Andes, then part of the Spanish colony of Gran Colombia, Today it is Equador. Their mission was an attempt to determine the exact location and circumference of the Equator. Using the best instrumentation available they succeeded in marking off this 0o of latitude

The French were not the first to determine the precise location of the Equator. Thirty-five hundred years ago, the ancient peoples of the Andes used this area to make precise astronomical observations as well. With no written language, they were nonetheless able to undertake a study of the heavens so thorough that they were able to fix the exact location of the Equator – more accurately even than the French team 3,300 years later, who were in fact off by some seven seconds (about 350 meters)! A stone circle on a nearby hilltop, long thought to be an old animal pen, was discovered to be, in fact, an ancient marker for the Equator.

Today, Marcelo Padilla, Director of Mitad del Mundo ("The Middle of the World") proudly displays his GPS displaying the 00o00'00" but about 900 feet to the south of the previously established French line. He has arranged an interesting array of his artsy open air museum in sharp contrast to the elaborate exhibit displaying busts of French scientists aligned along the line topped with a globe on a pyramid.

Marcelo proves his accuracy of the line by simple means as well as his Garmin GPS. A basin of water with a stopper sits over a bucket all located on the Equator. Marcello pulls the plug and the water drains directly below through a 1" hole with no turbulence. The basin , bucket and all is relocated about 1 meter to the North, filled once again, the plug pulled, the water drains but this time with a counter clock wise rotation. Now all is again moved 1 meter south. of the line, stopper pulled and the water drains with a clock wise swirl. The Coriolis effect.

http://www.imagestation.com/picture/sraid105/pedadca1d99947662e7c442904919a19f/f97e2ebf.jpg

I couldn't detect any tricks to the above experiment.

http://www.imagestation.com/picture/sraid105/pd8d9b948df9a67f7644785a093ad3a82/f97e2eb8.jpg

The true Equator acording to GPS.

JD

Greg H
03-07-2004, 06:03 PM
:D Ahh the truth at last! And you have found proof that a line is painted around the world at the equator, just like it shows on the globes! It sounds like the beginning of quite an adventure.
Best of lusk, enjoy!

NormMessinger
03-07-2004, 06:37 PM
Welcome home, JD. Phyllis and I were talking about your trip on our walk yesterday. Sorta felt like it was time we heard from you. Just goes to show we are never to old to learn new trips.

igatenby
03-07-2004, 06:43 PM
Ah - so water South of the line drains clockwise and North of the line anti-clockwise.

Proof that the Northern hemisphere is going backwards!

Or is it that we are really on top in the South and you guys are the ones "Downunder"?

I think I'd want to put a very accurate level on the basin before I would belive that 1 metre would make all the difference flow direction BTW. Wouldn't the earth's wobble make that not work for half the year?

Ian

imported_Steven Bauer
03-07-2004, 06:57 PM
This is great. Just as the Cribbean Saga winds down we get the Equatorial Saga. Keep it coming. And thanks for sharing.

Steven

Steve Lansdowne
03-07-2004, 10:13 PM
Hey, now I understand how the ancient people of the Andes figured out where the equator was. They just wandered north to south with their bucket of water and their sink, stopping every few feet to see which way it drained!!

George Roberts
03-08-2004, 01:00 AM
The Coriolis effect at/near the equator is well undocumented.

J. Dillon
03-08-2004, 02:04 PM
Thanks Norm, good to back in the good ole USA. smile.gif

The GPS read out for those relying on electronics for positioning ;)

http://www.imagestation.com/picture/sraid107/pfdb06b4215097b257963e55aae22409e/f967ce0d.jpg

To come yet Shamans, bugs, boobies, ;) iguanas, blow holes and dugout canoes.

JD

imported_Steven Bauer
03-08-2004, 05:25 PM
Yes!

Ian McColgin
03-08-2004, 06:20 PM
With igatenby, I'm puzzeled by the anti-clockwise north of the equator. Also, having performed that experiment at about 10N in a basin that could be made do drain straight, clockwise or anti-clockwise by only very subtle manipulation, I'm surprised that anyone could get a reliable experiment within a meter of the equator.

But along the line of innovative demonstrations, I was once on an Africa flight with my Dad. As we approached the equator he told me to stand at the head of the cabin and watch.

Dad came on the PA:

"This is your Captain speaking. We are just about to cross the equator, which is just off the port. For you who are not familiar with our terminology that's the left side of the plane. At any rate, if you will look off to the port at about 10 o'clock you can see the equator."

Sure enough, lots of folk on the starboard side got up to look.

JimConlin
03-08-2004, 10:32 PM
I suspect that the key to getting the experiment to work that way is the combination of dumb luck and a very small number of trials.

Jim
(aka the curmudgeon)