Understanding regional climate changes is essential to guide an effective adaptation policy, reveals a study.
A new synthesis of regional meteorological data highlights the emerging signals of climate change. The researchers emphasize the increasing intensity of the monsoons, the alteration of storm tracks, and changes in polar precipitation, underscoring the critical need for region-specific data to inform effective climate policies and protect communities from rising risks.
The effects of climate change are not distant future scenarios or confined to remote parts of the world — they are unfolding now, even in our own backyards.
In 2023, extreme weather events affected communities on every inhabited continent, causing major floods, droughts, and wildfires.
Although global-scale changes, such as the rise in the global mean temperature, often dominate discussions on mitigation actions, a detailed understanding of the regional impacts of a warming world is crucial to protect communities from rising risks.
A team of researchers writing in the journal Frontiers in Science synthesized the results of several new studies to provide a clearer picture of the regional impacts of climate change.
“We are continually improving our understanding of climate change, especially its regional aspects, to inform adaptation policies,” says the first author, Matthew Collins, from the University of Exeter, in the United Kingdom.
“While global aspects remain important, humanity will feel the impacts of climate change at the regional level. It is here that infrastructure planning, preparation for extreme events, and the management of public health and food security must be up-to-date in terms of climate science.”
Regional impacts and rising risks
The study revealed a range of local-emerging signals of climate change that are likely to occur this century, spanning from the equator to the poles.
In tropical and subtropical regions, drastic changes in precipitation are projected to significantly alter the intensity of the monsoons, leading to substantial social impacts.
Monsoon systems, which are fundamental for agriculture, directly affect billions of people. About 60% of the world’s population lives in the monsoon regions of the Northern Hemisphere, where the summer monsoon season can produce up to 80% of the annual precipitation.
As aerosol emissions decline and greenhouse gases rise, monsoons are expected to become more intense, potentially resulting in floods, landslides, and reduced agricultural yields.
In mid-latitudes, high-resolution climate models indicate a potential strengthening of storm tracks toward north-west Europe, increasing the risk of extreme weather conditions.
“The increase in monsoon rainfall and the variability of storm rainfall can cause droughts in some regions and strong winds and floods in others, with devastating impacts on agriculture, essential infrastructure, and the overall health of communities,” explains co-author Vikki Thompson, from the Royal Netherlands Meteorological Institute (KNMI), in the Netherlands.
In polar regions, projections show that a larger fraction of precipitation will fall as rain rather than snow, potentially accelerating ice melt and amplifying sea level rise.
This transition endangers coastal communities worldwide. Moreover, changes at the poles are not limited to those regions.
Polar amplification, referring to the phenomenon where the poles warm faster than the rest of the planet, can influence weather patterns in the mid-latitudes, potentially altering storm tracks.
Revised climate models can improve regional adaptation and resilience
The study calls for a concerted, interdisciplinary effort by the scientific and policy communities to bridge gaps in climate modelling.
Higher-resolution data, the integration of machine learning techniques, and new models will improve the simulation of complex climatic phenomena, both globally and regionally.
According to Eunice Lo, co-author from the University of Bristol, United Kingdom, these advances are vital to informing international climate policies and ensuring that local adaptation measures — such as resilient infrastructure, enhanced early warning systems, and sustainable agricultural practices — are based on the most reliable and accurate data.
“Regional information is essential for preparing for these extreme phenomena and for implementing effective, science-guided adaptation measures,” adds co-author Matt Priestley, also from the University of Exeter.
“Without investments in advanced climate modelling and monitoring systems, policymakers and local communities are left to navigate climate risks with insufficient information, which can lead to inadequate or misdirected efforts,” he concludes.
