Climate change and feedback loops: Have we reached the point of no return?

We are seeing catastrophic long-term shifts in temperature and weather patterns, driven by human activities such as burning fossil fuels, deforestation, and industrialization.

- ACHARYA PRASHANT

WHERE DO WE CURRENTLY STAND ON CLIMATE CHANGE?

These activities release greenhouse gases, trapping heat in the Earth's atmosphere and leading to a rise in global temperatures. Stronger hurricanes, longer droughts, more intense heatwaves, and unpredictable rainfall patterns have become the new normal.

Our planet is heating up faster than ever, and 2024 made that clearer than any year before. According to NASA, 2024 was officially the hottest year on record, with global temperatures soaring 1.3°C above the 20th-century average. Greenhouse gases reached record levels this year, with carbon dioxide in the atmosphere increasing from 278 ppm in 1750 to more than 420 ppm in 2024. Ocean heat last year was the highest ever recorded. Given the trends, ocean warming will continue, and what's even more scary is that it is irreversible. With greenhouse gas concentrations reaching new highs, the world felt the impact of extreme weather, rising seas, and shrinking ice caps.

The oceans absorbed more heat than ever, expanding and pushing sea levels even higher. Antarctica's sea ice shrank to near-record lows, and glaciers continued to melt at alarming rates. UNESCO estimates that since 1975, the world's glaciers have lost around 9,000 gigatons of ice—enough to already seriously raise sea levels and disrupt freshwater supplies.

WHAT ARE FEEDBACK LOOPS?

The discourse on climate change highlights pronounced symptoms—rising temperatures, melting glaciers, and severe weather. However, beneath these symptoms lie complex natural processes that drive and reinforce these outcomes. Enter climate feedback loops, which quietly but powerfully shape the trajectory of global warming. To understand the underlying dynamics of global warming, we must first investigate these self-reinforcing feedback loops.