Sunshine hours education thread (date, may, Boston, NYC)

[Glacierx]

^This is one reason why no longer measure sunshine hours in Canada (outside a select sites).

[veeman123]

to make statements as the original poster did without providing solid evidence as far as im concenred is spreading false information.

[Thunder98]

About 300 hour diffrences between Sault Ste Marie Ontario/Michigan

https://en.wikipedia.org/wiki/Sault_...ntario#Climate


https://en.wikipedia.org/wiki/Sault_...chigan#Climate

[RWood]

The effect of Kipp-Zonen measurement with a fixed cutoff level (used in other measurement systems as well of course) in this country is to boost summer numbers too unrealistically high levels. The old Campbell-Stokes system had a variety of problems but at least tried to compensate for seasonality in temperate latitudes. As far as I'm concerned "bright sunshine" or "unobstructed sunshine" should have a compensation factor involved. When one looks at the NZ results in the two systems, the C-S data looks much more coherent as a whole when mapped against other known climatological factors, than does the K-Z data.

[irlinit]

[url]https://icdc.zmaw.de/fileadmin/user_upload/icdc_Dokumente/matuszko_AComparisonofSunshineDurationRecordsfromt heCampbellStokesSunshineRecorderandCSD3SunshineDur ationSensor_JApplClimatol_119_401-406_2015.pdf[/url]

Interesting read, particularly page 4 onwards

[chicagogeorge]

Originally Posted by irlinit

https://icdc.zmaw.de/fileadmin/user_...1-406_2015.pdf

Interesting read, particularly page 4 onwards

So those authors feel that the new e-sensors over state sunshine hours?

[B87]

Originally Posted by irlinit

https://icdc.zmaw.de/fileadmin/user_...1-406_2015.pdf

Interesting read, particularly page 4 onwards

Assuming a similar trend here, Heathrow would see about 1802 hrs with the electronic sensor, Kew 1825 hrs.

Electronic sensors seem to have trouble when there are sunny but hazy skies, or cirrus clouds, which are a fairly common occurrence here in summer.



https://c2.staticflickr.com/4/3892/1...ce64cdd2_b.jpg

[irlinit]

It would appear so, I don't know though, they still say that the CS appears to be the best method for measuring sunshine but I just don't agree

[B87]

Originally Posted by irlinit

It would appear so, I don't know though, they still say that the CS appears to be the best method for measuring sunshine but I just don't agree

CS is the best method for measuring bright sunshine, as in blue dome skies. It is poor when it comes to skies like in the above pictures, which electroic sensors would record.

[irlinit]

Originally Posted by B87

CS is the best method for measuring bright sunshine, as in blue dome skies. It is poor when it comes to skies like in the above pictures, which electroic sensors would record.

Yeah, I've read that too, and our skies are normally partly cloudy/mostly sunny for a lot of the year..

I'm reading up on it at the moment, I wonder if there are sunshine readings in the UK anywhere with a foster recorder?