London Daily

Focus on the big picture.
Monday, Jun 30, 2025

What Would Happen In Nuclear War? Global Little Ice Age, Simulations Show

What Would Happen In Nuclear War? Global Little Ice Age, Simulations Show

Researchers found that in all scenarios, firestorms would release soot and smoke into the upper atmosphere, blocking out the sun and forcing temperatures to fall.
A fresh study on the global impact of a nuclear war has concluded that any conflict would plunge the world into darkness, cause temperatures to plummet and wipe out much of the world's sea life.

Researchers at Louisiana State University ran multiple computer simulations to assess the impact of global and regional nuclear conflicts on the world's oceans. They found that in all scenarios, firestorms would release soot and smoke into the upper atmosphere, blocking out the sun and forcing temperatures to fall by an average 13 degrees Fahrenheit in the first month.

That, in turn, would cause ocean temperatures to fall and sea ice to expand by more than six million square miles, blocking major ports including China's Tianjin, Copenhagen and St. Petersburg. Researchers said changes to Arctic sea ice would likely last thousands of years, describing the event as a "nuclear little ice age."

The study comes after the specter of nuclear war was raised following Vladimir Putin's invasion of Ukraine, with Russian Foreign Minister Sergei Lavrov warning in April that there was a "serious" risk of nuclear war.

Lead author, assistant professor Cheryl Harrison, said: "It doesn't matter who is bombing whom. It can be India and Pakistan or NATO and Russia. Once the smoke is released into the upper atmosphere it spreads globally and affects everyone."

The simulations examined what would happen to the Earth if the US and Russia dropped 4,400 100-kiloton bombs on cities and industrial areas, and, separately, if 500 of the same-sized weapons were detonated in an India-Pakistan conflict.

In the largest scenario, ocean recovery would likely take decades at the surface, and hundreds of years at depth.
Newsletter

Related Articles

0:00
0:00
Close
Robots Compete in Football Tournament in China Amid Injuries
Trump Administration Considers Withdrawal of Funding for Hospitals Providing Gender Treatment to Minors
Texas Enacts Law Allowing Gold and Silver Transactions
China Unveils Miniature Insect-Like Surveillance Drone
OpenAI Secures Multimillion-Dollar AI Contracts with Pentagon, India, and Grab
Marc Marquez Claims Victory at Dutch Grand Prix Amidst Family Misfortune
Germany Votes to Suspend Family Reunification for Asylum Seekers
Elon Musk Critiques Senate Budget Proposal Over Job Losses and Strategic Risks
Los Angeles Riots ended with Federal Investigations into Funding
Budapest Pride Parade Draws 200,000 Participants Amid Government Ban
Southern Europe Experiences Extreme Heat
Xiaomi's YU7 SUV Launch Garners Record Pre-Orders Amid Market Challenges
Jeff Bezos and Lauren Sanchez's Lavish Wedding in Venice
Russia Launches Largest Air Assault on Ukraine Since Invasion
Education Secretary Announces Overhaul of Complaints System Amid Rising Parental Grievances
Massive Anti-Government Protests Erupt in Belgrade
Trump Ends Trade Talks with Canada Over Digital Services Tax
UK Government Softens Welfare Reform Plans Amid Labour Party Rebellion
Labour Faces Rebellion Over Disability Benefit Reforms Ahead of Key Vote
Jeff Bezos and Lauren Sánchez Host Lavish Wedding in Venice Amid Protests
Trump Asserts Readiness for Further Strikes on Iran Amid Nuclear Tensions
North Korea to Open New Beach Resort to Boost Tourism Economy
UK Labour Party Faces Internal Tensions Over Welfare Reforms
Andrew Cuomo Hints at Potential November Comeback Amid Democratic Primary Results
Curtis Sliwa Champions His Vision for New York City Amid Rising Crime Concerns
Federal Reserve Proposes Changes to Capital Rule Affecting Major Banks
EU TO HUNGARY: LET THEM PRIDE OR PREP FOR SHADE. ORBÁN TO EU: STAY IN YOUR LANE AND FIX YOUR OWN MESS.
Trump Escalates Criticism of Media Over Iran Strike Coverage
Trump Announces Upcoming US-Iran Meeting Amid Controversial Airstrikes
Trump Moves to Reshape Middle East Following Israel-Iran Conflict
Big Four Accounting Firms Fined in Exam Cheating Scandal
NATO Members Agree to 5% Defense Spending Target by 2035
Australia's Star Casino Secures $195 Million Rescue Package Amid Challenges
UK to Enhance Nuclear Capabilities with Acquisition of F-35A Fighter Jets
Russian Shadow Payments via Cryptocurrency Reach $9 Billion
Explosions Rock Doha as Iranian Missiles Target Qatar
“You Have 12 Hours to Flee”: Israeli Threat Campaign Targets Surviving Iranian Officials
Macron and Merz: Europe must arm itself in an unstable world
Germany and Italy Under Pressure to Repatriate $245bn of Gold from US Vaults
Airlines Evaluate Flight Cancellations Amid Escalating US-Iran Tensions
Starmer Invites Innovators to Join Government Talent Scheme
UK Economy’s Strong Opening Quarter Shows Signs of Cooling
Harrods Seeks Court Order to Secure Al Fayed Estate for Victims
BA and Singapore Airlines Cancel Dubai Flights Amid Middle East Tensions
Trump Faces Backlash from MAGA Base Over Iran Strikes
Meta Bets $14 B on Alexandr Wang to Drive AI Ambitions
WATCH: Israeli forces show the aftermath of a massive airstrike at Iran's Isfahan nuclear site
FedEx Founder Fred Smith, ‘Heart and Soul’ of the Company, Dies at 80
Chinese Factories Shift Away from U.S. Amid Trump‑Era Tariffs
Pimco Seizes Opportunity in Japan’s Dislocated Bond Market
×