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Wow. Do you make these graphs or are they on NWS? If they are on NWS can you show me how to access them please?
Btw, Chicago/MDW had 48 days thus far with 70F/21C+ minimums
The mean is about 50 nights above 70, we have had 62 so far. Max is 76 in 2010. I have seen srfoskey make similar graphs as that and have been searching for a while and still have not found out how to make them.
That sort of system seems bias against humid climates, it wouldn't give accurate sunshine totals. Most days here are partly cloudy to mostly sunny, not the typical blue dome conditions of drier climates. I just feel all sunshine should count, whether it's blue dome or mostly cloudy, if the sun's rays are hitting the ground, unabated, it should count.
I'm beginning to feel our American sunshine amounts aren't so inaccurate after all.
I agree that Blue Hill having 2250 seems rather low. I think days with passing cloud the CS machine does record sunshine, just not accurately. I checked back on my email and it does record on pt cloudy days, but seems to underestimate.
I'm beginning to feel our American sunshine amounts aren't so inaccurate after all.
Yes, but you realize that means the US is not as sunny at it appears when compared to places that use CS machines. It means their sun hours would be higher using our system. It's either or. We can't compare our sun hours to theirs using raw data cause our machine was less sensitive.
Most of our summer days are like the pics I posted previously, which could explain why our CS figures look lower than it actually feels living here.
I've noticed London never looks particularly gloomy in any of the pics I see on here, it's generally partly to mostly cloudy. I think its cloudy reputation is a bit unfair, at least outside of winter.
Quote:
Originally Posted by muslim12
So what would London average then really? 1900? 1800? Doubt it's more than 1900. Also doubt winter sunshine would increase, just summer sunshine.
I think 1900 sounds reasonable. And the southern coast of the U.K. is probably around 2000+ hours.
I agree that Blue Hill having 2250 seems rather low. I think days with passing cloud the CS machine does record sunshine, just not accurately. I checked back on my email and it does record on pt cloudy days, but seems to underestimate.
Chicago has between 2500-2600 using the Foster. Back in the late 1800's and early 1900's when the the Marvin was in use. We recorded over 2600 hours. It's irradiance threshold is above 260W/m2. However it is affected by both direct and diffused radiation..... Also, the official observation station that was recording was located right on the lake, so you there would be an added marine layer if compared to stations further "inland".
With the Kipp Zonen, our MDW Coop Observer records around 2400 hours annually. However, the recorder is in his backyard and is definitely obstructed by the shade of the trees on two sides so, it may be higher
Yes, but you realize that means the US is not as sunny at it appears when compared to places that use CS machines. It means their sun hours would be higher using our system. It's either or. We can't compare our sun hours to theirs using raw data cause our machine was less sensitive.
I know. It sucks that we can't accurately compare our sunshine hours with other places around the world. It also sucks that sunshine amounts are barely recorded in this country anyway.
I've noticed London never looks particularly gloomy in any of the pics I see on here, it's generally partly to mostly cloudy. I think its cloudy reputation is a bit unfair, at least outside of winter.
I think 1900 sounds reasonable. And the southern coast of the U.K. is probably around 2000+ hours.
I remember Tom checking the weatherspark site once (not great for here I know), and said that London actually has a lower percentage of overcast days than somewhere like Philly (but also a lower number of sunny days).
When dhdh moved here at the start of the year, he mentioned that there were a lot of days that have some sun, and not many days that are fully cloudy or full sun (and this was compared to Paris)!
I've noticed London never looks particularly gloomy in any of the pics I see on here, it's generally partly to mostly cloudy. I think its cloudy reputation is a bit unfair, at least outside of winter.
I think 1900 sounds reasonable. And the southern coast of the U.K. is probably around 2000+ hours.
Most people only put photos on when the weather is good though.
London's reputation is exaggerated a bit, but it IS a cloudy city. The last few summers have been ridiculous, but any place that struggles to have 50% of sunshine is clearly a cloudy place.
I never noticed it when I was younger, but since working away in other countries then coming home, it really highlighted how cloudy it is.
I'm sure visitors to England will notice the lack of sun more than anything else.
I've put loads of photos up in cloudy weather. It just isn't fully overcast that often. Most days between May-Sep look like the pics I posted a couple of pages back.
There's also the issue of under recording sun hours, which I was not the first to point out. Today for example has been totally sunny since about 9am (cloud dispersed at 8am), and now at 5pm some cirrus has formed, but I doubt the sun figure will reflect that. We should record a minimum of 8 hours of sun today, more likely 9 hrs.
Last edited by B87; 09-01-2016 at 10:05 AM..
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