Archive for the ‘Surfacestation’ Category

Guest post from Roger Andrews, who says: ” This is a review that extends Euan Mearns’ article on sunshine hours, cloud cover and SAT in the UK over mainland Europe and the North Atlantic. It reveals some interesting features that I make no attempt to explain – basically because I can’t – but someone else may have some ideas.” Apologies to Roger A for the delay in getting this article posted.

SUNSHINE, CLOUD COVER AND SURFACE AIR TEMPERATURES IN EUROPE
by Roger Andrews

The recent “UK temperatures since 1933” post discussed the relationships between sunshine hours, which were assumed to be an inverse cloud cover proxy, on surface air temperatures (hereafter SAT) at 23 UK stations. Here I summarize the relationships between sunshine hours, cloud cover and SAT over  Europe using observations from ~30 stations selected from the European Climate Assessment (ECA) data set (acknowledgement as requested to Klein Tank, A.M.G. and Coauthors, 2002. Daily dataset of 20th-century surface air temperature and precipitation series for the European Climate Assessment. Int. J. of Climatol., 22, 1441-1453.) Station locations are shown in Figure 1:

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This is a guest post by Jerry Lundry

Two plots are presented for annual average temperature in the United States Historical Climate Network (USHCN). This data set is highly regarded by some in climate science and is sometimes used as a surrogate for world-wide temperatures. Among its attributes are its coverage of a large land mass (the forty-eight contiguous United States), dense coverage of that land mass (1218 stations), and records that are complete to 1912 and missing only about eighty stations back to 1895. Temperatures for all stations are also provided for 1908.

In 2012, the author downloaded and produced annual average temperatures for this data set. The first figure below provides average annual temperatures for 1908 and 1912-2011. The curve faired through the data is a standard Excel sixth-order polynomial. This curve shows minima in years 1914 and 1970, and maxima in years 1940 and 2004, give or take a year or two.

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Figure 1

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ANYONE LOOKING FOR THE EU SEED LAW PETITION CAN FIND IT HERE

I haven’t time to edit this properly, so I hope Roger Andrews will forgive me for just pasting his email into this guest post and lobbing in the images. Somewhere in the archives there’s a post From RA in which he used my cumulative solar technique to get some good fits too. I’ll link it  if anyone finds it. You’ve all seen data before, and know what to do…

Here are the results of the empirical models I ran five or so year ago, plotted on the three sets of figures linked to below and accompanied by a writeup, sort of.  The first set of figures allows for both anthropogenic and natural forcings. Results are presented for the 60-90N, 30-60N, 0-30N, 0-30S and 30-60S latitude bands and for the area-weighted global average of these bands. (There weren’t enough data to put together a comparison for 60-90S.)

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Image courtesy Microsoft and providers, please strictly non-commercial.

Bing image location 50.7795 -1.83622

Highest reported temperature was at Hurn (Bournemouth Airport) a known poor synoptic Met Office site, although it could be worse. There is a bit of a mystery.

24 hours ending 2200 on 14 Jul 2013:
UK Highest max 0900-2100 31.0 °C Hurn
Lowest max 0900-2100 12.9 °C Lerwick
Lowest min 2100-0900 3.6 °C Katesbridge
Highest rainfall 2100-2100 4.8 mm Cassley
Sunniest 2100-2100 14.3 hours Morecambe
Last updated: 0001 on Mon 15 Jul 2013

The Met Office hourly data for Hurn peaks at 29.0C, so there is a brief peak for some reason. Looking at other data 29 or so would be fair enough. How did 2C materialise?

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The dear Met Office have been pushing over the past few days about HOTTEST EVER THIS YEAR. Face it Met Office, enjoying life does not involve screaming or fear unless you are a kid.

Current 2013 UK maximum temperature confirmed

The current 2013 UK maximum temperature was recorded on Saturday 13 July, with 31.4 C at Heathrow. Wales also saw its highest 2013 temperature with 30.2 C at Llysdinam. The previous maximum of 29.9 C from Monday 8 July, at Edenfel, remains the current highest for Northern Ireland. Scotland saw its highest 2013 temperature on Tuesday 9 July, with 28.7 C at Strathallen Airfield. Issued at 2319 on Sat 13 Jul 2013.

Heathrow like most temperature breakers is a defective site. How about fixing it?

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Chilbolton: data update, 107 days

Posted: June 1, 2013 by tchannon in Dataset, Surfacestation

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This post is is primarily for a data release, 107 days, 16th Feb 2013 through 31st May 2012 less one day. (I was indisposed)

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Figure 1

Since mid February 2013 I have been capturing high time resolution data from the Chilbolton Observatory web site, done for the previous day. This is processed from .PNG files into numeric data here. [1]

Data exists for about 23 hours a day at a few minutes between samples, data currently amounts to about 56,000 readings.

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Sometimes the sun shines through, reflects off and other optical effects of cloud. This does lead to insolation well in excess of the maximum for the time of year. An instance is shown above complete with an hourly sky thumbnail which almost caught one at the time, the effect comes and goes very quickly.

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Surfacestation Fyvie Castle

Posted: May 6, 2013 by tchannon in Analysis, Surfacestation

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Fyvie Castle, Aberdeenshire, Scotland. A National Trust property, web site entry

57.442805° -2.389692° Google browser map
Altitude 55 metres

AWS since 1994, manual data record from 1959

Estimated Class 4, fails Class 3 on ground cover within 10 metres. (to WMO 1046, 2010)

UHI, microclimate, in a garden. Distance, none.

I need to add I have a close lat/long but no cross reference images or other information so I might have incorrectly located the Stevenson screen.

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What follows shows nothing new but is food for thought given the matter of pyrgeometers on the Talkshop.

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Figure 1

1st May was a particularly sunny day in southern England but cool, with a continuing wind from Norway via the North Sea.

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