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Code Red:  Hottest January Ever!

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According to European Union’s Copernicus Climate Change Service Copernicus, January 2025 globally was 0.09°C warmer than January 2024, the previous hottest January.

 

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January 2025 was also 1.75°C warmer than it was before industrial times. It was the 18th month of the last 19 that the world hit or passed the internationally agreed upon warming limit of 1.5°C above pre-industrial times. The record heat of January has come as a surprise to many scientists.

 

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There are two important weather patterns that usually cause big temperature changes worldwide – El Niño and La Niña. The patterns are driven by changes in water temperature in the Pacific Ocean near the Equator. El Niño years, like last year, are usually warmer. But temperatures usually drop quickly in La Niña years. A new La Niña weather pattern began in January of this year, but so far, it hasn’t cooled things down. That’s what has scientists puzzled.

 

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2023 Summer Was The Hottest In 2,000 Years

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It has been confirmed that the summer of 2023 in the Northern hemisphere was hottest in the last 2,000 years. The UN’s climate body has said that the last time the Earth was continuously this warm may have been more than 100.000 years ago.

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The experts looked at deep sea sediments and ice cores to determine this. They also looked at tree rings for valuable insights about climate. Tree rings not only show the tree’s age, but also record detailed information about the state of the climate each year as the tree grows. Scientists reviewed living specimens and fossils, from the European Alps to the Russian Altai mountains.

They studied trees living at altitude, where the impact of summer growth would be most clearly felt. In such places, ringe are usually wider in warmer years when there is more growth and thinner in colder years. This long term Tree ring record along with modern temperature data has shown that: Summer of 2023 was 2.07°C warmer than the “pre-industrial” period of 1850-1900. Compared with the coldest summer in the record which was the year 536, last summer was 3.93°C warmer.

How is Global Warming Tracked?

Presently, global warming is tracked by comparing temperatures to the “pre-industrial era”, before humans started burning large amounts of fossil fuels. This time period is widely defined as the period between 1850 to 1900.

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