We pass over the Tropic of Capricorn
By Judy Evans
October 17, 2020 6:26pm CST
We are now in Carnarvon and passed banana plantations and vegetable gardens on our way into the town. Not too far north we also passed over the Tropic of Capricorn. I missed taking a photo of it on the way up as we were on a different road (inland) and there was nowhere to pull over. The Tropic of Capricorn marks the southernmost latitude where the sun can be seen directly overhead. This ‘southern solstice’ occurs in December. The latitude is currently 23°26'11.7? (or 23.43659°) south, but Wikipedia says it is very gradually currently moving northward at 15 metres per year. The other thing I found interesting is that less than 3% of the world's population lives south of the Tropic of Capricorn. This represents 30% of the population of the Southern Hemisphere. Who’d a thought??
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I think a lot of population in Africa and South America lives north of Tropic of Capricorn in Southern Hemisphere. Yet I expected a world population figure above 3% for South of Tropic of Capricorn. Of course, not many people live in the frigid Antarctica- mainly the research teams. And 15 Metres per year seems quite significant. I also read somewhere that some Million years from now, the poles would be switched. We cannot be sure whether the human race or earth would still be existent after Million of years.
Can we say that 100% of the population living South of the Tropic of Capricorn is in the Southern hemisphere ? I never crossed this one. I remember a sign telling "You are crossing the meridian of Greenwich." This one splitting the Western and the Eastern hemisphere does not move every year, however the International Reference Meridian used by maps and GPS since the 1980's is at about 100m of the meridian of Greenwich.