Met Office Temperature Network Is Junk

By Paul Homewood

The Met Office’s UK temperature network is junk, according to new FOI information released:

From The Daily Sceptic:

Nearly one in three (29.2%) U.K. Met Office temperature measuring stations have an internationally-defined margin of error of up to 5°C. Another 48.7% of the total 380 stations could produce errors up to 2°C, meaning nearly eight out of ten stations (77.9%) are producing ‘junk’ or ‘near junk’ readings of surface air temperatures. Arguably, on no scientific basis should these figures be used for the Met Office’s constant promotion of the collectivist Net Zero project. Nevertheless, the state-funded operation frequently uses them to report and often catastrophise rises in temperature of as little as 0.01°C.

Under a freedom of information request, the Daily Sceptic has obtained a full list of the Met Office’s U.K. weather stations, along with an individual class rating defined by the World Meteorological Office. These CIMO ratings range from pristine class 1 and near pristine class 2, to an ‘anything goes’ or ‘junk’ class 5. The CIMO ratings penalise sites that are near any artificial heat sources such as buildings and concrete surfaces. According to the WMO, a class 5 site is one where nearby obstacles “create an inappropriate environment for a meteorological measurement that is intended to be representative of a wide area”. Even the Met Office refers to sites next to buildings and vegetation as “undesirable”. It seems class 5 sites can be placed anywhere, and they come with a WMO warning of “additional estimated uncertainties added by siting up to 5°C”; class 4 notes “uncertainties” up to 2°C, while class 3 states 1°C. Only 13.7%, or 52 of the Met Office’s temperature and humidity stations come with no such ‘uncertainty’ warnings attached.

The above graph shows the percentage totals of each class. Class 1 and 2, identified in green, account for just 6.3% and 7.4% of the total respectively. Class 3 identified as orange comes in at 8.4%. The graph shows the huge majorities enjoyed by the darkening shades of red showing classes 4 and 5. It is possible that the margins of error identified for classes 3, 4 and 5 could be a minus amount – if for instance the measuring device was sited in a frost hollow – but the vast majority are certain to be pushed upwards by heat corruptions.

Last year, the investigative journalist Paul Homewood sought FOI information from the Met Office about the Welsh weather station Porthmadog, which often appears in ‘hottest of the day’ listings. He was informed that the site was listed as class 4 and “this is an acceptable rating for a temperature sensor”. Hence, continued the Met Office, “we will continue to quote from this site”. In short, observes Homewood, the Met Office is happy to use a class 4 site for climatological purposes, “even though that class is next to junk status”. It is bad enough that the Met Office is using this site, but it is even worse that they know about the issues but still plan to carry on doing so, Homewood continued. “How many other weather stations are of such poor quality?” he asked.

Now we know.

Full post here.

The Met Office of course pretends that it knows the average temperature of the UK to within 0.1C, and that it can accurately compare current temperatures with those a century ago.

Not only do we now that is a lie, but we also know that they knew this all the time as well.

It is time to establish a network of a small number of high quality stations, and only use these to publish official temperature trends in future.

If they want to still use the old datasets, they should show the appropriate error bars, along with a warning that the margin of error is so great that they have no statistical significance at all.