. DEHRADUN: Winter fog has long been a disruptive force in northern India, grounding flights, delaying trains and bringing daily life to a crawl across the Indo-Gangetic plain. Now, new research published in Science Advances journal reveals that air pollution is not just accompanying these fog events – it is actively making them thicker, longer-lasting and harder to disperse, reports Gaurav Talwar. The peer-reviewed study, led by researchers from IIT Madras, shows that high concentrations of aerosols – tiny particles released from vehicles, industries, biomass burning and other human activities – are “invigorating” fog layers over parts of northern India. Using 15 years of satellite data and high-resolution weather-chemistry simulations, the researchers uncovered a clear physical mechanism linking pollution to intensified fog. They found that during polluted conditions, fog layers over the Indo-Gangetic plain grew about 15-20% thicker, often reaching heights of 400-600 m. Crucially, this thickening happens mainly at the top of the fog layer, not at the surface. The reason lies in how aerosols interact with fog droplets – more aerosols lead to more droplets, stronger cooling, increased vertical mixing and ultimately a thicker fog layer. As per the study, satellite observations revealed that fog in polluted conditions contains larger droplets near its top – a finding that may initially seem counterintuitive. In many clouds, pollution leads to smaller droplets. But in fog, where moisture is abundant and the atmosphere is nearly saturated, the enhanced condensation and cooling at the fog top allow droplets to grow larger despite high aerosol concentrations. The study stresses controlling aerosol emissions is not only essential for cleaner air, but may also be critical for reducing the intensity and duration of winter fog in northern India.About the AuthorGaurav TalwarJournalist reporting on natural disasters in the Himalayas with a keen interest in politics, especially during election season.End of ArticleFollow Us On Social MediaVideos‘Attack On My Life’: Suvendu Adhikari Targets Mamata Banerjee, Levels Serious AllegationUkrainian Envoy Hails PM Modi As Global Leader, Praises Ukraine Peace EffortsChirag Paswan Hits Out At Tejashwi Yadav Over ‘People Lost In Democracy’ commentIndia’s Reform Express Accelerates Growth and Investment, Says PM ModiAmit Shah Confident BJP Will Form Government In Kerala In 2026, Vote Share ClimbingOwaisi Blames Congress, Hits Out at UAPA After SC Denies Bail To Umar Khalid‘Some Historians, Politicians Tried To Whitewash History Of Invaders’: PM Modi Hits Out In Somnath‘Hijab-Clad PM’ Row: Owaisi’s ‘Tubelight’ Jab At Himanta Sarma Over ‘Only Hindu PM’ RemarksRSS Chief Mohan Bhagwat Calls For Hindu Unity, Says India Will Lead World In 20–30 YearsPM Modi Offers Prayers At Somnath Temple, Witnesses Grand Drone Show & Fireworks At Swabhiman Parv123PhotostoriesSobhita Dhulipala’s most graceful saree looks – PicsHow to make Instant Rava Appe for breakfastCute parenting moments of Kareena Kapoor and Saif Ali KhanInside Nupur Sanon and Stebin Ben’s stylish Christian weddingLohri 2026: 11 must-try Punjabi dishes to celebrate Lohri‘The Raja Saab’: Educational qualification of the star cast10 things 90s kids begged their parents for, that Gen Z will be shocked even existed7 baby girl names inspired by Indian holy places that parents secretly love8 countries around the world most famous for their wildlifeSamantha Ruth Prabhu’s timeless saree looks that redefine elegance123Hot PicksTrump tariffsUS Supreme CourtGold rate todayBengaluru newsCigarette price hikePublic holidays January 2026Bank Holidays JanuaryTop TrendingUS Border Petrol Agent ShootCanada Immigration Applications 2026Kim KardashianVanessa BryantTrump TariffsConnor McDavidNFL PlayoffsAlex BregmanNandani SharmaFortnite Updates
DEHRADUN: Winter fog has long been a disruptive force in northern India, grounding flights, delaying trains and bringing daily life to a crawl across the Indo-Gangetic plain. Now, new research published in Science Advances journal reveals that air pollution is not just accompanying these fog events – it is actively making them thicker, longer-lasting and harder to disperse, reports Gaurav Talwar. The peer-reviewed study, led by researchers from IIT Madras, shows that high concentrations of aerosols – tiny particles released from vehicles, industries, biomass burning and other human activities – are “invigorating” fog layers over parts of northern India. Using 15 years of satellite data and high-resolution weather-chemistry simulations, the researchers uncovered a clear physical mechanism linking pollution to intensified fog. They found that during polluted conditions, fog layers over the Indo-Gangetic plain grew about 15-20% thicker, often reaching heights of 400-600 m. Crucially, this thickening happens mainly at the top of the fog layer, not at the surface. The reason lies in how aerosols interact with fog droplets – more aerosols lead to more droplets, stronger cooling, increased vertical mixing and ultimately a thicker fog layer. As per the study, satellite observations revealed that fog in polluted conditions contains larger droplets near its top – a finding that may initially seem counterintuitive. In many clouds, pollution leads to smaller droplets. But in fog, where moisture is abundant and the atmosphere is nearly saturated, the enhanced condensation and cooling at the fog top allow droplets to grow larger despite high aerosol concentrations. The study stresses controlling aerosol emissions is not only essential for cleaner air, but may also be critical for reducing the intensity and duration of winter fog in northern India.
![Zoji La [Ladakh] SRINAGAR: Zoji La tunnel, an upcoming strategic corridor that will provide all-weather connectivity between Kashmir and Ladakh, is nearing a defining moment, with engineers inching towards a “breakthrough” final blast expected around May 30.Work is progressing at about four meters per day from both ends — Sonamarg (Baltal) in Kashmir and Minamarg in Ladakh — using controlled drilling and blasting. Only 300 meters of the 13.155km tunnel is left to excavate, Harpal Singh, chief operating officer (COO) of Megha Engineering and Infrastructure Ltd (MEIL), told TOI. The Hyderabad-based company is executing the project.“The final blast will bring the excavation phase to a close, completing the tunnel’s core structure,” Singh said, adding the blast will signal the physical connection between Kashmir and Ladakh.According to Singh, this historic milestone will be achieved by reducing tunnel excavation to zero within 30 to 35 days. “Breakthrough will ensure speedy construction of the remaining works, including concrete lining, permanent tunnel drainage, installation of surveillance equipment, control buildings, underground transformers and (traffic) smoke control systems,” Singh explained.The tunnel is still another two-and-a-half years from completion. Before it is opened to the public, the breakthrough will allow construction teams and machines to move seamlessly between two ends, streamlining work. “The teams and equipment can move through the tunnel without any hassle,” Singh said, adding this will help sustain construction through winters when heavy snowfall in Sonamarg halts surface movement.The tunnel will reduce distance between the two ends (Sonamarg and Minamarg) from 49km to 43km and increase vehicle speeds from 30kmph to 70kmph, officials said.End of ArticleFollow Us On Social MediaVideosSamrat Chaudhary Becomes Bihar CM: A Political Journey Marked by Setbacks and ReinventionIran Expresses Confidence In India’s BRICS Presidency Amid West Asia ConflictPM Modi, Donald Trump Hold 40-Min Phone Call, Discuss Strait Of Hormuz, West Asia SituationPak Enters Noida? Stunning Twist To Wage War As Workers Riot In NCR; Yogi Minister Drops BombshellFuel Price Freeze Amid Hormuz Crisis Is Costing Oil Companies Thousands of Crores DailyChina Defends Renaming Places In Arunachal After India Slams Beijing’s ‘Mischievous Attempt’Bihar DY CM Puzzle for JDU, Nishant Kumar Reluctance Complicates NDA MathNitish Kumar Resigns After 20 Years as Bihar CM; BJP Names Samrat Choudhary as SuccessorWomen’s Reservation Bill Explained: How 850-Seat Lok Sabha Plan Promises To Change Indian PoliticsExplained: Supreme Court Backs Right to Vote but Denies Relief to Bengal’s Deleted Voters123PhotostoriesWhy this new rice variety is called ‘Designer Rice’ and how it will impact your protein intake10 free things to do in Noida that are actually worth your timeHow to make Chef Sanjeev Kapoor-style Langarwali Dal6 essential real estate investment strategies for first-time buyers9 unique food etiquette rules from around the worldTop 5 IT hubs in India driving real estate demandArgue without breaking up: 5 simple rules every couple needs to know‘Bhooth Bangla’, ‘Dacoit’ To ‘The Drama’: What to watch in theatres this Week5 things you can bake beyond bread in an OTGIsrael–Lebanon tensions flare again: Inside Hezbollah’s arsenal and Lebanon’s military hand against Israel123Hot PicksIran warStock market holidayPurple cap winnerOrange cap winnerIPL Points TablePublic holidays April 2026Bank Holidays AprilTop TrendingDelhi-Dehradun ExpresswayStock market holidayBank holiday todayKaty PerryAnna Kepner murderDon TzuPraful HingeIPL Points TableKavya MaranNFL news roundup](https://vknewstoday.in/wp-content/uploads/1776198165_photo.jpg "Zoji La [Ladakh] SRINAGAR: Zoji La tunnel, an upcoming strategic corridor that will provide all-weather connectivity between Kashmir and Ladakh, is nearing a defining moment, with engineers inching towards a “breakthrough” final blast expected around May 30.Work is progressing at about four meters per day from both ends — Sonamarg (Baltal) in Kashmir and Minamarg in Ladakh — using controlled drilling and blasting. Only 300 meters of the 13.155km tunnel is left to excavate, Harpal Singh, chief operating officer (COO) of Megha Engineering and Infrastructure Ltd (MEIL), told TOI. The Hyderabad-based company is executing the project.“The final blast will bring the excavation phase to a close, completing the tunnel’s core structure,” Singh said, adding the blast will signal the physical connection between Kashmir and Ladakh.According to Singh, this historic milestone will be achieved by reducing tunnel excavation to zero within 30 to 35 days. “Breakthrough will ensure speedy construction of the remaining works, including concrete lining, permanent tunnel drainage, installation of surveillance equipment, control buildings, underground transformers and (traffic) smoke control systems,” Singh explained.The tunnel is still another two-and-a-half years from completion. Before it is opened to the public, the breakthrough will allow construction teams and machines to move seamlessly between two ends, streamlining work. “The teams and equipment can move through the tunnel without any hassle,” Singh said, adding this will help sustain construction through winters when heavy snowfall in Sonamarg halts surface movement.The tunnel will reduce distance between the two ends (Sonamarg and Minamarg) from 49km to 43km and increase vehicle speeds from 30kmph to 70kmph, officials said.End of ArticleFollow Us On Social MediaVideosSamrat Chaudhary Becomes Bihar CM: A Political Journey Marked by Setbacks and ReinventionIran Expresses Confidence In India’s BRICS Presidency Amid West Asia ConflictPM Modi, Donald Trump Hold 40-Min Phone Call, Discuss Strait Of Hormuz, West Asia SituationPak Enters Noida? Stunning Twist To Wage War As Workers Riot In NCR; Yogi Minister Drops BombshellFuel Price Freeze Amid Hormuz Crisis Is Costing Oil Companies Thousands of Crores DailyChina Defends Renaming Places In Arunachal After India Slams Beijing’s ‘Mischievous Attempt’Bihar DY CM Puzzle for JDU, Nishant Kumar Reluctance Complicates NDA MathNitish Kumar Resigns After 20 Years as Bihar CM; BJP Names Samrat Choudhary as SuccessorWomen’s Reservation Bill Explained: How 850-Seat Lok Sabha Plan Promises To Change Indian PoliticsExplained: Supreme Court Backs Right to Vote but Denies Relief to Bengal’s Deleted Voters123PhotostoriesWhy this new rice variety is called ‘Designer Rice’ and how it will impact your protein intake10 free things to do in Noida that are actually worth your timeHow to make Chef Sanjeev Kapoor-style Langarwali Dal6 essential real estate investment strategies for first-time buyers9 unique food etiquette rules from around the worldTop 5 IT hubs in India driving real estate demandArgue without breaking up: 5 simple rules every couple needs to know‘Bhooth Bangla’, ‘Dacoit’ To ‘The Drama’: What to watch in theatres this Week5 things you can bake beyond bread in an OTGIsrael–Lebanon tensions flare again: Inside Hezbollah’s arsenal and Lebanon’s military hand against Israel123Hot PicksIran warStock market holidayPurple cap winnerOrange cap winnerIPL Points TablePublic holidays April 2026Bank Holidays AprilTop TrendingDelhi-Dehradun ExpresswayStock market holidayBank holiday todayKaty PerryAnna Kepner murderDon TzuPraful HingeIPL Points TableKavya MaranNFL news roundup")
