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Colour change needed
The map shows prevailing westerly winds with blue arrows and a reference in blue text; and shows the prevailing trade winds with yellow arrows and a reference in yellow text. The blue arrows and text are fine by the yellow is far too difficult to see and read. Please change it to a different colour. Orange would be a good choice to contrast against the blue; dark red would be even better, as would dark green.
P.S. The Map is Wrong
The map shows prevailing westerlies between the 49th parallels and the poles, while trade winds are shown between the Equator and the 49th parallels.
In fact, the trade winds operate BOTH between the poles and 60 degrees AND between the Equator and 30 degrees. The prevailing westerlies operate between 30 degrees and 60 degrees.
For some bizarre reason, the map has irrelevant notations for hurricane and cyclone. Those should be removed, since the map has nothing to do with hurricanes/cyclones/typhoons.
What makes it worse, is that the notations for hurricanes and cyclones are in the wrong place; they originate between the equator and 30 degrees zone, at 10-15 degrees mostly, not IN the 30 degrees zone.
Throwing food overboard?
I have a lot of difficulty believing that sailors on a long voyage would throw edible meat overboard. I have no source, but if no one objects, I'm going to change this to eating the horses, which is what I've read elsewhere, on the grounds that it's just far more plausible.
kraemer 21:25, 4 July 2006 (UTC)
- I most certainly object. The throwing of horses overboard is well documented - the reason is that they required water, which was at a premium if a ship became becalmed. It has also been posited that a reason for throwing the horses overboard was to lighten the load of the ship, an important factor when winds are at a premium. As to eating the horses, you must appreciate that the meat would become inedible in very short order. With no ability to cool the meat, and without a means to salt or otherwise preserve it, meat would spoil very rapidly in the equatorial environment. I consider this and this to be reliable sources on the matter. Denni ☯ 23:24, 4 July 2006 (UTC)
- Maybe someone could better illustrate the winds with images 22.214.171.124 01:52, 22 January 2007 (UTC)B2Dnz
This is about tradewinds which were the providential guidance to those ancient ships which sailed without any technology and electric/electronics.One would know better about them if they know who were those people who ventured in an wilderness like the endless Atlantic Indian and Pacific oceans.They are Columbus ,Vasco de Gama,Captian Cook and Megallen.If not for these winds we would have not known the world that surrounds us at all.They need to be studied in the same environment like C/V/C/M. to understand them better. —Preceding unsigned comment added by 126.96.36.199 (talk) 08:36, 3 April 2008 (UTC)
The map at the start of the article, Image:Map prevailing winds on earth.png, shows the trade winds originating as far north as somewhere near South Dakota -- clearly above latitude 40°N, anyway. I do not believe that can possibly be right -- weather systems pretty much move west to east across the whole of the "Lower 48" states of the US, so the prevailing winds in that whole area must be the westerlies. As shown on this map, for example: http://www.colorado.edu/geography/blanken/GEOG%206181%20Fall%202003/noble/images/06_tradewind_1.jpg.
The same incorrect map is in Wikimedia Commons and is linked from several other articles in the English-language Wikipedia alone, but the instructions there say to report problems at the talk page of an article using the image. So I'm posting here and adding a "dubious" tag to the map caption in the article.
- Wikimedia commons has a similar illustration at File:Earth Global Circulation.jpg which, like the one you mentioned at the University of Colorado, is not an earth surface projection map but it does try to show a side view cross section of the Hadley cells at the limbs of the earth's disk. I suspect the extent of the Hadley cells beyond 30° latitudes North or South is not shown on the illustration I mentioned. It may suit your preference. 188.8.131.52 (talk) 03:16, 31 March 2011 (UTC)
- I agree the South Dakota arrow should not be there, as the trades should not extend beyond the horse latitudes of 30-35 degrees. You could fix the map by downloading it, covering over the bad arrow, and uploading the result, replacing the existing file. -R. S. Shaw (talk) 00:50, 8 August 2011 (UTC)
This issue has been fixed some months back, so I've removed the "Dubious" tag. (I wonder whether the problem didn't originate as a [mis]representation of winds at a time of year when the subtropical ridge is most northerly -- the northern summer -- and the trade winds might, in fact, possibly arise that far north?) -- Perey (talk) 06:00, 23 September 2012 (UTC)
I fixed a misspelled word in the 2nd paragraph of the first section, "expected" was spelled "expcted".
I plan to correct this when I get home, but I'm fairly sure that the term "trade wind" comes from the fact that they blow "trade" or steadily. — Preceding unsigned comment added by Elcquid (talk • contribs) 20:19, 11 September 2013 (UTC)