January 2025 was hottest January on record despite factors thought to make that less likely
Washington – Despite the unusually cold America, the world is warm to the monthly hot record of January, When the cool sea According to Copernicus, European climate service, there is a little less popularity in 2025.
Surprising January hot records match a new study by A Climate Science Heavyweight, former NASA scientist James Hansen, and others believe global warming is accelerating. This is a claim that separates the research community.
January 2025 is 0.09 degrees Celsius (0.16 degrees Fahrenheit), warmer than January 2024 (formerly the hottest January), and warmer than 1.75 c (3.15 f) before the Industrial Age, Copernicus calculated out. In the 18th month of the past 19 months, the world hit or passed international agreement, before the pre-industrial era it was 1.5 degrees Celsius (2.7 degrees Fahrenheit). Unless and until the global temperature is above its 20 years above it, scientists will not consider the restriction as being violated.
Copernicus’s record dates back to 1940, but other American and British records date back to 1850, and scientists use agents such as tree rings to say that this era was the warmest in about 120,000 years, or Since the beginning of human civilization.
By far, the biggest driver is greenhouse gases Accumulation of burning coal, oil and gasBut the natural contribution to temperature changes did not meet expectations, said Samantha Burgess, a strategic leader in the European Weather Service.
The biggest natural factor in global temperature is usually the natural cycle of changes in the equatorial Pacific waters. When the Central Pacific Ocean is particularly warm, it is an El Nino, and global temperatures tend to soar. Last year was a substantial El Nino, and although it ended in June last year, the year was even warmer than initially expected, The hottest record.
The cooling flip side of El Nino, la nina, tends to suppress the effects of global warming, thus leaving record temperatures well below the possibility. La Nina started in January after brewing for a few months. Just last month, climate scientists predicted that 2025 heat would not be as hot as in 2024 or 2023, with La Nina being the main reason.
“While the equatorial Pacific doesn’t create warm conditions for our global climate, we’re still seeing record temperatures,” Burgess said. Most of that is because of other oceans in other oceans in the world,” Burgess said. record warmth.
Usually after El Nino like last year, temperatures drop rapidly, but “we haven’t seen it yet,” Burgess told the Associated Press.
For Americans, the January record news seems odd given how cold it is. But the United States is only a small part of the Earth’s surface, “a larger area on the Earth’s surface is much warmer than average.”
January is unusually mild in the Arctic. Burgess said that part of the Canadian Arctic temperature is 54 degrees warmer than the average temperature, and sea ice that has become so warm begins to melt in some places.
Copernicus says this month’s Arctic is linked to January’s records The lowest sea ice. The U.S.-based National Snow and Ice Data Center is second only to 2018.
Burgess said February started cooler than last year.
But don’t count 2025 in the hottest year, Hansen, said Hansen, the godfather of climate science. He is now at Columbia University.
In a study in the Journal Environment: Science and Policy for Sustainable Development, Hansen and colleagues said the warmth of the past 15 years is about twice as high as in the first 40 years.
“I believe this higher interest rate will last for at least a few years,” Hansen told the Associated Press in an interview. “For a full year, it will be bitten between 2024 and 2025.”
Even if the changes in El Nino and expected climate change were eliminated, there was a significant increase in temperature, Hansen said. He noted that recent transport regulations have resulted in a reduction in sulfur pollution, which reflects the sunshine away from the earth and effectively reduces warming. He said that will continue.
“The record warmth persists until 2023, to say the least, until the first month of 2024 to 2025,” said Dean Jonathan Overpeck, an environmental firm at the University of Michigan. “It seems that there is no doubt that the impact of global warming and climate change is affected.” Accelerating.”
But Princeton’s Gabe Vecchi and Pennsylvania’s Michael Mann said they disagree with Hanson’s acceleration. Vecchi said there is not enough data to show that this is not a random chance. Mann said the temperature rise is still within the climate model’s predictions.
