New Data Demonstrates that 2023 was the Hottest Summer Ever | by Alan Jones | Sep, 2023


It’s been hotter this summer than at any time since 1880!

How can Data Scientists help demonstrate the way that our climate is rapidly changing and help in the communication of the seriousness of the situation? We take a look at the way we can present the data effectively through analysis and visualization and fine-tune the representation of that data.

But first, let’s take a short journey through some of the consequences of global warming. Then we will consider how to effectively visualize the data with Plotly and Python, and see how we can demonstrate how those data relate to CO₂ emissions.

This map depicts global temperature anomalies for meteorological summer in 2023
This map depicts global temperature anomalies for meteorological summer in 2023 (June, July, and August). It shows how much warmer or cooler different regions of Earth were compared to the baseline average from 1951 to 1980. Credits: NASA Earth Observatory/Lauren Dauphin, used with permission

This map from NASA shows this summer’s global temperature anomalies when compared to the 1951 to 1980 average and I’m not surprised to see that the part of Europe where I live is one of the areas on the globe where the temperature change has been the highest — it’s been sweltering here in Spain with temperatures of 40 degrees Celsius (that’s 104 degrees Fahrenheit) not being unusual.

The effects

The high temperatures have exacerbated wildfires in Canada, Hawaii, parts of Europe and elsewhere, and have likely contributed to the massive rainfall events that have been seen around the globe.

“Drevenochoria” Fire As Seen From Ilion, Attika At Approximately 2AM, July 18
“Drevenochoria” Fire As Seen From Ilion, Attika At Approximately 2AM, July 18.. Image by Sthivaios CC BY-SA 4.0

Wildfires in Europe are not unusual in the summer months but this year they have been particularly fierce, especially in Greece where evacuations took place from the islands of Rhodes and Corfu, among other areas, and many people died or were injured. And, of course, in Hawaii, a whole town was destroyed.



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