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Old 06-28-2013, 03:34 PM
 
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Does anyone know how to compare the sunshine hours of two locations while they have different day lengths?

If we want to compare, for example: Darwin Australia, and Winnipeg Canada.

In July, both locations average 315 sunshine hours.

Now how would we find out the sunshine totals of Darwin if it had Winnipegs daylight hours and vice versa with Winnipeg with Darwin's daylight hours.
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Old 06-28-2013, 03:46 PM
 
Location: Zagreb, Croatia
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Well, I'd just calculate the hours to a percent and then multiply it by the amount of possible sunshine hours.

So, Darwin has 315/354.95 = 0.88 = 88% of possible sunshine
Then I calculate the most possible sunshine hours for Winnipeg in July, which is 492.9, and multiply 0.88*492.9 = 433.7
It turns out Darwin would have had 433 hours of sunshine in July if it had the same length of day as Winnipeg.
Then do the same for Winnipeg with Darwin's day length.
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Old 06-28-2013, 04:19 PM
 
6,909 posts, read 7,643,266 times
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Quote:
Originally Posted by ksolina View Post
Well, I'd just calculate the hours to a percent and then multiply it by the amount of possible sunshine hours.

So, Darwin has 315/354.95 = 0.88 = 88% of possible sunshine
Then I calculate the most possible sunshine hours for Winnipeg in July, which is 492.9, and multiply 0.88*492.9 = 433.7
It turns out Darwin would have had 433 hours of sunshine in July if it had the same length of day as Winnipeg.
Then do the same for Winnipeg with Darwin's day length.
Great thanks yeah that is exactly what I was asking. How did you come up with the 354 and 492 though?
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Old 06-28-2013, 07:37 PM
 
Location: Wellington and North of South
5,069 posts, read 8,571,207 times
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Quote:
Originally Posted by ksolina View Post
Well, I'd just calculate the hours to a percent and then multiply it by the amount of possible sunshine hours.

So, Darwin has 315/354.95 = 0.88 = 88% of possible sunshine
Then I calculate the most possible sunshine hours for Winnipeg in July, which is 492.9, and multiply 0.88*492.9 = 433.7
It turns out Darwin would have had 433 hours of sunshine in July if it had the same length of day as Winnipeg.
Then do the same for Winnipeg with Darwin's day length.
The 356 is about the astronomical value for Darwin. The measurable amount given the equipment would probably be no more than about 345 hours (subtract about 20 minutes a day). So realistically about 91% of the possible.
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