Climate change is affecting the United States in vastly different ways depending on the region, according to a study published in PLOS Climate. Researchers María Dolores Gadea Rivas from the University of Zaragoza and Jesús Gonzalo from Carlos III University in Spain found that heating patterns differ significantly across the country, indicating a need for locally tailored solutions.
Although climate change is a global problem, its impacts are not evenly distributed. Local conditions dictate how temperature increases are experienced, which means that adaptation strategies and policies must be customized for specific regions. Compared to issues like public health or economic inequality, these regional differences have not been sufficiently studied. To fill this gap, researchers developed a framework to examine temperature fluctuations across the 48 continental US states.
Hidden trends
The study analyzed average temperatures from 1950 to 2021, as well as more than 26,000 daily measurements per state. This approach captured not only average changes but the entire temperature range at a local level. The findings present a more complex picture than averages suggest. Only 27 states (55%) recorded an increase in average temperature. However, 41 states (84%) showed increases in at least one part of their temperature spectrum.
In some areas, this translates to higher maximum temperatures, while in others, it means milder lows. For example, states on the West Coast are experiencing more extreme temperatures, while many northern states show higher minimum temperatures.
Impacts on health, agriculture, and policy
These disparities can have significant consequences. Shifts in temperature extremes can affect crop growth, strain public health systems, and influence how communities perceive climate risks. All these factors play a major role in shaping local climate policies.
Researchers note that their method can also be used to study other climate shifts, such as changes in precipitation and sea-level rise. The authors summarize: "By looking beyond average temperatures, we show that most US states are warming in specific parts of the temperature distribution, even when the mean increase is not statistically significant. This reveals sharp regional inequalities in how climate change is experienced in the United States."
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