Extreme Weather Events — Definition
Definition
Extreme weather events refer to weather phenomena that are at the extremes of the historical distribution for a particular region and time of year. These events often involve unusually high or low temperatures, heavy precipitation, prolonged droughts, or intense storms, deviating significantly from the average weather patterns.
While weather refers to the atmospheric conditions over a short period, and climate refers to long-term average weather patterns, extreme weather events are increasingly being linked to long-term climate change.
The scientific consensus, notably from the IPCC AR6, indicates that anthropogenic (human-caused) greenhouse gas emissions are altering the Earth's energy balance, leading to a warmer planet and a more energetic and unstable atmosphere.
This increased energy manifests as more frequent, intense, and prolonged extreme weather events. For instance, warmer oceans provide more energy for tropical cyclones, leading to stronger storms and heavier rainfall.
A warmer atmosphere can hold more moisture, intensifying precipitation events and increasing the risk of floods. Conversely, altered atmospheric circulation patterns can lead to prolonged dry spells and heatwaves, exacerbating drought conditions.
From a UPSC perspective, understanding these events goes beyond mere definitions; it requires grasping their scientific underpinnings, their profound impacts on human societies and ecosystems, and the policy frameworks designed to manage them.
In India, a country highly vulnerable due to its diverse geography and large population, extreme weather events like devastating cyclones, prolonged heatwaves, intense floods, and severe droughts have become increasingly common, posing significant challenges to development, food security, and public health.
The critical examination angle here focuses on the nexus between climate change, disaster risk reduction, and sustainable development, particularly how India is adapting its strategies to build resilience against these escalating threats.
The study of extreme weather events is crucial for aspirants to comprehend the multifaceted challenges of environmental governance, disaster management, and international cooperation in the Anthropocene era.