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The #RainfallRescue volunteers are now digitising the very earliest UK rainfall data, from the 1860s and earlier.

Some stretch back to 1677, or they might stumble across rainfall records taken by Luke Howard.

Will they finish the job today or tomorrow? rainfallrescue.org
5 million observations rescued so far for the 1870s to 1950s. #RainfallRescue
Day 16 of #RainfallRescue.

The 15,607 volunteers will today finish transcribing the last of the 65,000 sheets of 10-year monthly rainfall amounts for the UK, spanning 1677 to 1960.

Truly amazing to see 5+ million measurements rescued from paper to digital in such a short time.
And, that's it! All 65,000 ten-year rainfall sheets have been digitised by 15,762 volunteers, rescuing over 5 million measurements. Now starts the quality control process! Thanks to everyone who has contributed - this data will be used for decades to come!

#RainfallRescue
We have added back some of the images where the volunteers haven’t agreed on the values for some extra checks if anyone wants to keep going!
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Ed Hawkins
@ed_hawkins
But what happened before 1850?

A THREAD
Earth's climate has changed before for reasons nothing to do with human activity. Changes in the position of the continents, the sun's output, the number of volcanic eruptions, and the Earth's orbit have all influenced our planet's climate. Climate scientists study these reasons.
We know that none of those reasons can explain the warming measured since 1850. We also know that an increase in levels of greenhouse gases in the atmosphere will warm the planet, just as we've observed. It is our emissions of CO₂ that dominates recent warming trends.
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Ed Hawkins
@ed_hawkins
So, both @TheEconomist and @guardian feature the Warming Stripes on their front pages in print this morning!

Hopefully this will start a few conversations! #climatestrike
The @guardian have also decorated their website homepage with the Warming Stripes and a photo of @GretaThunberg for the #climatestrike: theguardian.com/uk
Thanks to the journalists: @Eaterofsun, @AlexSelbyB, @dpcarrington, @niko_tinius & everyone involved.
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Ed Hawkins
@ed_hawkins
"The climate has always changed" (or similar phrase) does not imply what many seem to think it implies. Let me explain.
Since the 1830s scientists have known that the Earth's climate changes without any human influence, e.g. ice ages. Variations in the Earth's orbit, the location of the continents, the energy given off by the sun & the magnitude of volcanic eruptions can all affect the climate.
Before widespread use of thermometers in the mid-1800s the effects of a changing climate are seen in tree rings, ice cores, corals & other 'natural archives'. The 'little ice age' is the most recent period where natural factors changed the climate by a small but detectable amount
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