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Map Showing Great Lakes Area Lake Conductivity More Accurately

S

Schroedingers Cat

This doesn't show more accurate land area ground conductivity, but it does show the affects of salinity (more generally dissolved ionic salts) in lake regions including Lake St. Clair (shows as 40 mS/m), which explains CFCO 630 having such a good signal to the West into Michigan and beyond.

www.mediafire.com

US Ground Conductivity Map

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.
www.mediafire.com
 
Schroedingers Cat said:
This doesn't show more accurate land area ground conductivity, but it does show the affects of salinity (more generally dissolved ionic salts) in lake regions including Lake St. Clair (shows as 40 mS/m), which explains CFCO 630 having such a good signal to the West into Michigan and beyond.

www.mediafire.com

US Ground Conductivity Map

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.
www.mediafire.com
Click to expand...
Thank you! I presume you are using millisiemens per meter, right?
 
All those sites use several different units, so that you have to do a units conversion on them while scratching your head, but this map, like M-3, shows mS/m.

Environmental scientists make a lot of these type of measurements on lakes, but they use a unit you have to divide by 10 as I recall. Lake Erie is an area of emphasis for them, as you might expect.
 
Update: Got the download past my firewall! Yay! Great map. I liked that it has conductivity for Canada and Mexico, in addition to Alaska, Hawaii and the five Great Lakes. Nicely done.
 
Here is another interesting article, written by Environmental Scientists.

Great Salt Lake has a conductivity apparently about 3 times that of Seawater.


To convert uS to mS, divide by 1000. To convert cm to m, divide by 100 or multiply by .01. Since its in the denominator, multiply by 100. So the result is divide by 1000 and then multiply by 100. So the end result is divide by 10. Clear as Lake Erie?

Source. Based in A^2, FWIW. So they are coming from a little different POV than Radio Engineers.

www.hrwc.org

Home

For over fifty years we have protected and restored Southeast Michigan's Huron River Watershed.
www.hrwc.org www.hrwc.org
 
Interesting article. I knew that groundwave for Salt Lake City AMs to the west is fantastic, and that the Great Salt Lake was far more salty than seawater, so this connects the dots. The relationship between salinity and pollution is also intriguing. I noticed from the new ground conductivity map that I downloaded several weeks ago that Lake Erie has slightly better conductivity than the other Great Lakes. So the fact that it's generally regarded as the most polluted. connects the dots to possibly explain that.
 
cyberdad said:
Interesting article. I knew that groundwave for Salt Lake City AMs to the west is fantastic, and that the Great Salt Lake was far more salty than seawater, so this connects the dots. The relationship between salinity and pollution is also intriguing. I noticed from the new ground conductivity map that I downloaded several weeks ago that Lake Erie has slightly better conductivity than the other Great Lakes. So the fact that it's generally regarded as the most polluted. connects the dots to possibly explain that.
Click to expand...
And what happened to the conductivity in Lake Michigan near Gary, IN when most of the Steel Mills shut down? Does this explain our observations about WIND up the shore of Lake Michigan? What about the effects of reversing the flow of the Chicago River?

Google this for articles on the reversal of the Chicago River. Central Chicago is basically built on a swamp.

"Reversing the flow of the chicago river."
 
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This Lake Michigan conductivity would explain why WIND was coming in across basically an all water path to a point that juts out into the Lake South of Sheboygan, WI, with a signal as I recall as exceeding all other Chicago AMs. If the conductivity was even greater then near the shoreline due to more ionic salts from industrial outflow, it would definitely explain it.

A continuous outflow of ionic salts would mean the whole lake wouldn't be the same. Say you put dye into a beaker of water with an eyedropper. If you stopped it would be greater color near the eyedropper, until it eventually spread out to the whole vessel. But if it was continuous, it would always be a denser color near the eyedropper than further out. There was a Lake Erie study that showed this, but I can't find it now. The dye would be like a marker.
 
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Wow, didn't realize you could make your own ground conductivity thanks to ionic salts from Steel Mills! Now, how does one move the Great Salt Lake into one's own backyard? ;)
 
Most industries do have some kind of effluent, many are treated now that may not have been before. And there are a lot less steel mills and other factories now, but there's an upside and a downside to that.

Water softener waste is also apparently a big source of ionic salts.
 
cyberdad said:
Plan B would be sewage...ot water softner discharge.
Click to expand...
Organics probably wouldn't be as good as inorganic salts in increasing conductivity though.

I've told other people about WIND being very strong up there before, but they didn't think about it being like a kind of salt water path there.
 
I can vouch from experience that WIND is strong along the Lake Michigan shore of the Upper Peninsula. WTMJ and WISN are also stronger there than I might have expected
 
This certainly echoes my experience while traveling around Ohio and the Midwest.
It definitely explains why the Chicago 50Ks are weaker in Toledo than in Findlay or Lima, given that they have to cross the lesser ground conductivity of southwest Michigan and far northern Indiana en route. Also why WLW sounds a bit louder around Lima than in Columbus. It comes in well in both cities but I always felt like it sounded a bit louder and crisper up around Lima despite being essentially the same distance from the WLW tower. A sizable patch of 15 conductivity has to be why.
 
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