Analysis of "June was hottest ever recorded on Earth, European satellite agency announces" Published in The Independent , by Conrad Duncan on

Three scientists analyzed the article and estimate its overall scientific credibility to be 'very high'. more about the credibility rating

A majority of reviewers tagged the article as: Accurate.

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SCIENTISTS’ FEEDBACK

SUMMARY

This article in The Independent covers the release of June monthly average temperature data for Europe—which shows it was the warmest June on record by a significant margin—as well as an analysis of how climate change contributed to the extreme heat wave at the end of the month. The article was widely shared across social media, with over 325,000 engagements on Facebook and Twitter at the time of the review.

Scientists who reviewed the article found that it accurately summarized this information, although it did not link to the primary sources. (However, a correction notice added shortly after publication notes that “A previous headline on this story suggested June was the hottest month ever recorded. Instead, it was the hottest June ever recorded. The headline and article have been amended to reflect this.“)

See all the scientists’ annotations in context. You can also install the Hypothesis browser extension to read the scientists’ annotations in context.

REVIEWERS’ OVERALL FEEDBACK

These comments are the overall assessment of scientists on the article, they are substantiated by their knowledge in the field and by the content of the analysis in the annotations on the article.

Willem Huiskamp, Postdoctoral research fellow, Potsdam Institute for Climate Impact Research:

The article accurately and clearly states the facts regarding the recent extreme heat in June 2019 and its link to anthropogenic warming. This includes acknowledging that, at this point, this June record and its connection to climate change is based on only a single temperature product and one attribution study, and that further analysis may slightly change the initial conclusions drawn by researchers.

Giorgio Vacchiano, Assistant Professor, Università di Milano:

Good data and clear explanation. Evidence about the June heatwave being 5 times more likely under climate change is missing.

Victor Venema, Scientist, University of Bonn, Germany:

A decent summary of the European heat wave in June 2019. If anything the article understated how exceptional the weather was.

Notes:

[1] See the rating guidelines used for article evaluations.

[2] Each evaluation is independent. Scientists’ comments are all published at the same time.

ANNOTATIONS

The statements quoted below are from the article; comments are from the reviewers (and are lightly edited for clarity).

Last month was the hottest June ever recorded, European satellite agency announces Victor Venema, Scientist, University of Bonn, Germany: Copernicus Climate Services (managed by the European Centre for Medium-Range Weather Forecasts) also uses satellite data, but it is not a satellite agency, that would be ESA. I would suggest calling it a Climate Research or Climate Data Agency. The main source of this article is this press release by Copernicus Climate Services.

The data showed European average ​temperatures were more than 2C above normal and temperatures were 6-10C above normal over most of France, Germany and northern Spain during the final days of the month, according to C3S. Victor Venema, Scientist, University of Bonn, Germany: It is not a good idea to combine numbers for the full month and all of Europe with numbers for a few days and a part of Europe. That double difference makes it hard to understand and easy to miss one of the differences when casually reading it. 6-10 degrees Celsius for the entire month would have been special, but for a few days it is not.

European average ​temperatures were more than 2C above normal Victor Venema, Scientist, University of Bonn, Germany: European temperature this year in June were 2°C above the average over the period 1981 to 2010 (which was already warm due to man-made global warming). Climatologists call such averages over 30 year periods climate normals, a tradition that started before we knew about climate change. This technical term is probably best not used when writing for a general audience. The article understates how special the weather was by not mentioning that this average is 1°C above the previous record in 1999. And that it is about 1°C above the long-term warming trend, which is a rare outlier.

Rapid assessment of average temperatures in France between 26-28 June showed a “substantial” increase in the likelihood of the heatwave happening as a result of human-caused global warming, experts at the World Weather Attribution group said. Victor Venema, Scientist, University of Bonn, Germany: This part of the article is based on this press release by the World Weather Attribution group.

1.5C in European temperature over the past 100 years Victor Venema, Scientist, University of Bonn, Germany: That is also a reasonable estimate for the warming over land globally. (This is a global land warming estimate by Berkeley Earth; please take the values before 1900 with a pinch of salt.)