What do you dislike the most about your climate? (storms, places, seasons)
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Maybe the Heathrow station changed equipment or moved sites ? The change is abrupt.
There has always been something weird about Heathrow in relation to sunshine hours - it's as if it records 80 more hours than it should be in relation to where it is . Was the recording faulty from the off ? ( i know 80 isn't a mega amount ,but these small amounts add up and make a difference over a long period)
Myabe it's going through a 'correction' period -
That's only my speculation of course.
Looking at those figures at a distance it looks around the 1550s i think ,which in itself isn't a disastrous figure for inland . What's more weird is the sequence of unders . 10/11 even at the lower average .
The anomoly maps though haven't picked up on this weird about turn .
or ,as you say - the station could have changed .
Razza mentions poor suimmers nationwide - but the Bradford guy said all his records show above averages .
I wish i could find some reliable data for this area (Levington ) but where might i find that ? it just gives me 30 year averages
Those anomoly maps i thought were accurate - not so sure now after what B87 said
Not sure of the annual totals, most have been below average but a couple have been near normal.
Summer-wise, the 97-06 decade averaged about 215 hrs per summer month, while the 07-16 decade averaged 180 hra in June, 170 in July, and just 150 in August.
I've worked the same out for Bradford and unlike what I expected to see we've not had the same pattern at all - assuming the data is right of course:
1997-2006: June 154, July 161, August 151
2007-2016: June 161, July 165, August 152
Winter sunshine has gone up a lot since the year 2000, I don't really know why because those low totals in the 90s weren't down to smog like some of the earlier records were:
1980s: Nov 51, Dec 29, Jan 39, Feb 54
1990s: Nov 49, Dec 28, Jan 36, Feb 62
2000s: Nov 60, Dec 44, Jan 50, Feb 77
2010s: Nov 56, Dec 40, Jan 42, Feb 62
I've always thought our 1981-2010 average of 1265 looks suspiciously low, we might lose some hours because of the horizon but part of it is because it's just sunnier now than it used to be:
There has always been something weird about Heathrow in relation to sunshine hours - it's as if it records 80 more hours than it should be in relation to where it is . Was the recording faulty from the off ? ( i know 80 isn't a mega amount ,but these small amounts add up and make a difference over a long period)
It doesn't record more than it should. Kew Gardens a few miles away records more, 1653 hours.
Maybe a change of locationB87 to the Hampstead or even Greenwich site ?
where did you get those London figures from out of interest ?
Greenwich no longer records.
I worked them out from Heathrow's stats on the historic data page. They certainly haven't moved the location. It has definitely felt far more cloudy in the last decade than it typically would. The only months to see an increase in sun hours are March and April. Every other month has seen a decrease (but especially in summer).
There's also Harbin which is much colder than Chicago. It has a population of 6 million, or 10 million if you also count the outermost areas (the "sub-provincial city").
Another two are Changchun and Shenyang, both are a couple hours south of Harbin; each of these have a population of 4 million (inner city) or 7 million (sub-provincial).
Then there's also St. Petersburg which is colder and bigger than Chicago.
Dalian is also about as big and as cold as Chicago.
Novosibirsk and Montreal have about 1.5 million people, colder and smaller than Chicago but in the same general population category.
Montreal has over 4 million people in its metro area. It's quite a bit larger than Novisibirsk which is more the size of Ottawa or Buffalo.
I worked them out from Heathrow's stats on the historic data page. They certainly haven't moved the location. It has definitely felt far more cloudy in the last decade than it typically would. The only months to see an increase in sun hours are March and April. Every other month has seen a decrease (but especially in summer).
I have been looking at all the data and have come up with an idea ...
i'm going to start a new thread on this as it is interfering with the topic of the thread - but i do have some info
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