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I’ve spent much of the day adding a viewer to my DIYDIY Do It Yourself Global temperature application. The new viewer layers a line series of daily temperatures for each year from 1948 to 2023. The lines series are coloured grey apart from, 2023 in red, and 2016 in blue. I picked 2016 because that’s the warmest year in the series. I’ve also added a yellow band for the daily standard deviation and a black line for the long-term average. For much of this year 2023 has been trailing 2016, but in the first four days of July 2023 there’s been a very sharp spike in daily global temperatures, such that, and quite remarkably, the latest available global mean on the 4th of July was the highest in the entire 75 year series at 11.42°C. Not a lot of people know that.

I think it’s a great application, and the results from it are fascinating to see and I’m quite proud to have developed it. It’s a simple concept and can work on any Windows PC using NCEPNCEP The United States National Centers for Environmental Prediction (NCEP) delivers national and global weather, water, climate and space weather guidance, forecasts, warnings and analyses to its Partners and External User Communities. reanalysis data.