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Old 02-11-2012, 06:00 PM
nei nei started this thread nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

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Location: Western Massachusetts
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I'm wonder what other places experience large sunshine changes in a short distance. In winter, there is a drastic sunshine change in the Northeast US going inland.

Sunshine- Average Percent (%) Possible

For example, NYC records 49% sunshine in December. Go 170 miles NW to Binghamton and the sunshine drops to 29%. Go about 60 miles further north to Syracuse and the sunshine percentage drops to 25%; almost half of NYC. In Pennsylvania, a similar pattern occurs. Philadelphia records 49% sunshine, 290 miles to the west Pittsburgh records 28% sunshine in December. In eastern New England, December sunshine % are higher, 52% in Boston and Providence.

While I can think of other more drastic sunshine changes (northern and southern France, east and west of the Cascades — though for Washington state the sunshine contrast is mostly in the warmer months); these sunshine changes are accompanied by a precipitation pattern change and a different climate type. The climate and precipitation change for the northeast isn't as drastic. Can anyone think of similar examples?

Here's an example of upstate NY cloudiness:

http://forecast.weather.gov/MapClick...2&lon=-76.5002

and the Pacific Northwest:

http://forecast.weather.gov/MapClick...d2=-122.35&e=1

Last edited by nei; 02-11-2012 at 06:08 PM..
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Old 02-11-2012, 06:48 PM
 
Location: Mid Atlantic USA
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To your point, Binghamton isn't very far from here, and yet our forecast has only Tuesday as cloudy, the rest partly or mostly sunny. Maybe a combination of the Applachians and northwest winds flowing over the Great Lakes.
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Old 02-11-2012, 07:12 PM
 
Location: New Jersey
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I've been interested in this subject since I live basically between the sunny coast and cloudy inland (though closer to NYC than Binghamton or Scranton).

Only anecdotal, but last week I noticed during the Giants parade coverage that the skies were clear in NYC, but it was overcast in Northern New Jersey. I was only about 35 miles away that day too. I guess the line has to get drawn somewhere.
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Old 02-11-2012, 07:25 PM
nei nei started this thread nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

Over $104,000 in prizes has already been given out to active posters on our forum and additional contests are planned
 
Location: Western Massachusetts
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Interestingly, northern New England (or at least Concord, NH and Burlington, VT — the only two stations listed in those two state in that link I posted) has a sunshine percent minimum in November rather than the lower sun December.

I've traveled to upstate NY from Long Island / New York many times (usually on Rt 17). The usual cloudiness change occurs right before the Catskills, suggesting the mountains are the biggest cause. But I've seen it become cloudy too much further northwest of Rockland county. The Binghamton area in particular is a cloud magnet, it's rare to see a mostly clear sky.
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Old 02-11-2012, 09:22 PM
B87
 
Location: Surrey/London
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Go 50 miles south of London and the average annual sunshine increases by 300 hours.
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Old 02-12-2012, 06:30 AM
 
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Mostly altitude in the UK...top of Ben Nevis gets something like 700 hours a year, the town at the bottom Fort William gets around 1100 hours.
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Old 02-12-2012, 01:56 PM
 
Location: Vancouver, Canada
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I wouldn't be surprised if there were huge differences in sunlight levels between coastal Peru and dry areas slightly inland, while remaining broadly arid.
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Old 02-12-2012, 02:11 PM
 
Location: Toronto
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It could be true for most short distances from going up a mountain or crossing rainshadow areas, but then again if both sides of a highland differ in dryness within a short stretch, you might not call them "in the same climate"?

I guess the question is where can you get the most difference in sunshine hours within an area, while keeping other climate variables unchanging or similar as possible.
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Old 02-12-2012, 05:28 PM
 
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Quote:
Originally Posted by Stumbler. View Post
It could be true for most short distances from going up a mountain or crossing rainshadow areas, but then again if both sides of a highland differ in dryness within a short stretch, you might not call them "in the same climate"?

I guess the question is where can you get the most difference in sunshine hours within an area, while keeping other climate variables unchanging or similar as possible.
Well i guess some areas are more fog suseptible than others in England. For 1961-1990 Greenwich East London averaged 1438 hours compared to 1568 hours at Kew West London and 1574 hours at London Gatwick. Kew is 12 miles west of greenwich, gatwick 24 miles south
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Old 02-12-2012, 07:57 PM
 
Location: NY suburbs
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Quote:
Originally Posted by nei View Post
Here's an example of upstate NY cloudiness:

7-Day Forecast for Latitude 42.45°N and Longitude 76.51°W
LOL yeah, I've experienced this lack of sunshine in upstate NY for an extended period and just felt mentally down because of that.
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