2023 defied climate expectations. It wasn’t just hotter than predicted — it was strangely hot. Now, scientists are piecing together what caused this anomaly, raising fresh concerns about Earth’s climate systems.
Gavin Schmidt, NASA’s top climate modeller at the Goddard Institute for Space Science, admitted to feeling “humbled” by 2023’s extraordinary temperatures. Writing in Nature earlier this year, Schmidt noted that the year was warmer than models anticipated. The deviation, unexplained at first, sparked worries that climate change is entering uncharted territory.
At December’s American Geophysical Union (AGU) meeting, the world's largest Earth science conference, experts revisited the mystery. Like detectives solving a case, scientists meticulously ruled out some “suspects” while identifying others.
Key Suspects Behind the Heat Surge
El Niño
The natural El Niño event, which warms the tropical Pacific, began in 2023, contributing to global temperatures. Yet the warming exceeded even El Niño’s usual influence, raising eyebrows.
Cleaner Air from Shipping
New rules to reduce sulphur in ship fuel have lowered pollution levels. However, cleaner air allows more sunlight to reach the ocean surface, which adds to global warming.
Volcano and Solar Activity
The Hunga Tonga eruption in 2022 injected water vapour into the atmosphere but also sulphates, which slightly cooled the Earth. Meanwhile, the Sun reached its peak activity cycle, contributing minimal extra heat.
Cloud Cover Changes
Research by Germany’s Alfred Wegener Institute found Earth reflected less sunlight in 2023 — its dimmest year yet. Reduced cloud cover, particularly over northern mid-latitudes, amplified warming. Cleaner air may have played a role, alongside long-term climate shifts that are altering cloud patterns.
The Bigger Picture
Global warming is accelerating. Some scientists argue that the drop in sulphur emissions is now speeding up heating, while changing cloud dynamics add to the uncertainty.
What’s Next
GISS modellers are now combining the latest data on sulphur emissions, cloud dynamics, and sunlight reflectivity into updated climate simulations. Schmidt expects these runs to clarify the contributions of various factors and potentially reshape projections for Earth’s future.
The findings are clear: warming is unlikely to slow any time soon.
A woman was killed and five civilians were injured by shelling and s...
Uzbekistan welcomed 10.3 million foreign tourists in the first nine months of 2026, up 20.4 per cent year-on-year, as the Central Asian nation push...
What would you miss most after six months orbiting Earth, 400 kilometres above the ground? For astronauts, a familiar meal can offer a welcome tast...
The U.S. has banned government employees working in Saudi Arabia from using airports in the country without special authorisation. It comes after a deadly Houthi strike on Riyadh's King Khalid International Airport killed at least 13 people last week.
The Saudi-led coalition said early Thursday that it intercepted and destroyed a drone over Saudi Arabia’s Eastern Province.
U.S. President Donald Trump has called it “a disgrace” that Ukraine has resumed attacks on Russian oil refineries. Attacks are continuing from Russia and Ukraine as media reports say Ukraine has almost run out of Patriot interceptor missiles.
Ukraine is set to restart attacks on Russian oil refineries following a two-day pause, President Volodymyr Zelenskyy said, amid growing tensions with Washington over energy strikes and U.S. military support.
Azerbaijan is hosting the seventh summit of the Conference on Interaction and Confidence Building Measures in Asia (CICA) in Baku on Thursday, 15 October, following agreements that could extend the country's leadership of the Asian security forum until 2028.
Here’s your AnewZ Daily Brief for 15 October 2026, featuring the top five culture and entertainment stories from around the world.
Türkiye’s COP31 presidency has unveiled an action agenda designed to turn climate commitments into concrete projects and measurable results, focusing on clean energy, waste reduction, resilient cities and industrial decarbonisation.
Greenland and Antarctica have shed a combined 11.3 trillion tonnes of ice since 1979, according to the most comprehensive satellite study of the planet's ice sheets to date, with researchers warning the pace of loss has accelerated sharply in recent decades.
The European Union will continue allowing large-scale plastic waste exports to Türkiye despite concerns over recycling rates, environmental damage and the risk of illegal waste trafficking.
Hundreds of thousands of deep-diving turtles, known as olive ridley sea turtles, have arrived on Mexico’s southern coast for one of nature’s most striking nesting events. But conservation officials warn that climate change is making it increasingly difficult for their eggs to hatch.
You can download the AnewZ application from Play Store and the App Store.
What is your opinion on this topic?
Leave the first comment