---
title: "Scientists Discover Self-Reinforcing Interaction Behind Extreme Heat Waves"
url: https://newscentral.site/scientists-discover-self-reinforcing-interaction-behind-extreme-heat/
language: en
publisher: "News Central Site"
section: "Science"
published: 2026-11-06T19:00:08.000Z
updated: 2026-11-07T00:27:18.509Z
id: f05ea4f8-158e-4241-ae29-73f0cef32e07
source: "Phys.org https://phys.org/news/2026-11-mega-interaction-soil-moisture-atmospheric.html"
attribution: "Link to https://newscentral.site/scientists-discover-self-reinforcing-interaction-behind-extreme-heat/ and name News Central Site when you quote or summarize this story."
---

# Scientists Discover Self-Reinforcing Interaction Behind Extreme Heat Waves

A new study published in Science Advances reveals that a self-reinforcing interaction between temperature, soil moisture, and atmospheric pressure intensifies extreme heat waves by 10%.

Scientists have discovered a self-reinforcing interaction between temperature, soil moisture, and atmospheric pressure that intensifies extreme heat waves. This phenomenon makes them 10% hotter than they would be without this interaction. The study's findings were published in Science Advances by researchers from the Potsdam Institute for Climate Impact Research (PIK) and the International Institute for Applied Systems Analysis (IIASA).

Recent heat wave events have broken local temperature records, with a notable increase in frequency of extreme heat waves over moderate ones. For instance, Europe experienced a severe heat wave in 2022, where temperatures in the UK reached 40°C (104 degrees Fahrenheit), a first-time record. Similarly, the US Pacific Northwest saw a summer heat wave in 2021 that exceeded previous temperature records by 4.6°C.

Researchers have identified an emerging physical process behind extreme heat waves using machine learning methods and statistical analysis. They found that midlatitude regions, including Europe, southern Russia, Mongolia, eastern and northwestern North America, and others, are being affected by the interaction between soil moisture, atmospheric pressure, and temperature.

The study suggests that this interaction is driving higher temperatures during the most extreme heat events in these regions. By understanding the underlying mechanisms of these mega heat waves, scientists can better predict their occurrence and impact.

Further analysis of the data revealed that the self-reinforcing interaction plays a significant role in amplifying the severity of extreme heat waves, making them more intense than previously thought.

The interaction between soil moisture, atmospheric pressure, and temperature is a crucial factor in extreme heat waves.

High-pressure systems allow more solar radiation to reach the Earth's surface, causing temperatures to rise. At the same time, as temperatures increase, soils gradually dry out, reducing their ability to cool the surface through evaporation.

This two-way relationship between rising temperatures and drying soils has been understood for some time and is already factored into expectations of extreme heat events.

However, a more complex dynamic comes into play when examining mega heat waves that have significantly exceeded previous temperature records. In these cases, all three factors, drying soils, high pressure, and extreme heat, interact and drive each other further than previously thought.

The analysis reveals that as the world warms due to climate change, it becomes increasingly likely that the temperature threshold at which this dynamic is triggered is exceeded, leading to reinforcing feedbacks that drive temperatures during a heat wave.

The study's findings suggest that climate models may be underestimating the severity of extreme heat events due to a self-reinforcing dynamic involving soil moisture, atmospheric pressure, and temperature.

This interaction is thought to amplify the most extreme heatwaves in mid-latitudes by creating a feedback loop where rising temperatures further deplete soil moisture, leading to increased atmospheric pressure that in turn exacerbates warming.

The researchers warn that if their analysis is correct, it could mean more severe future heat wave risks than currently expected, highlighting the need for revised climate models to accurately forecast and prepare for extreme heat events.

---
Source: [Phys.org](https://phys.org/news/2026-11-mega-interaction-soil-moisture-atmospheric.html)  
Published by News Central Site: https://newscentral.site/scientists-discover-self-reinforcing-interaction-behind-extreme-heat/