x

Like our Facebook Page

   
Early Times Newspaper Jammu, Leading Newspaper Jammu
 
Breaking News :   Well done, Charak | Where cinema begins again: The quiet power of restored classics | The Global Population Challenge | Humans Vs Machines: who will win the future of human resource management | India cannot function without Ram, Krishna, Shiva: CM Yogi | New UP is rushing from heat wave to green wave under Yogi Govt, reveals Forest Deptt report | Balbir remembered Guru Ravidass on Guru Purnima | DC Bandipora visits Gurez, reviews developmental projects | 420 MT Rotor lowered in Unit-I of Pakal Dul H.E. Project, CVPPL | Power Shut down | LG warns people giving irresponsible statements, propagating TRF narrative | LG congratulates Rajat Charak | Post-Operation Sindoor, demand for ‘Make in India’ weapons has seen sharp rise: LG Sinha | Lithium auction in Reasi expected after final survey report | J&K has evolved into year-round, all-segment tourism destination: CM Omar | Arms cache recovered in Poonch | Nabbed with Rs 70 Lakh Heroin, a family from RS Pura’s Tanda village running cross-border narcotics network | Amarnath Yatra: 7,307 pilgrims leave Jammu Base Camp | SC says ECI’s roll revision drive mandated in Constitution, but questions timing | ACB arrests Patwari for accepting bribe | Landslide kills girl | 7 injured in Udhampur accident | Goods train derails in Kathua | Joint Director Tourism Jammu Aijaz Qaiser interacts with social media influencers | MLA Arvind felicitates young Wushu Stars for bringing laurels to J&K | Div Com Jammu reviews preparations for Annual Basohli Utsav | Illegal pony operator booked & temple theft case solved in Katra | J&K Govt embarks on study to establish IT/ITES Parks | HC Grants bail to CE in corruption case | J&K High Court conducts plantation drive at Janipur complex | Kavinder pays obeisance to Hridayadeep Ji Maharaj on Guru Purnima | Pipping ceremony of Assistant Sub-Inspector held | Drug peddler arrested, intoxicant capsules recovered by Udhampur police | ADGP Armed J&K visits IRP 4th Battalion, Kupwara | Mehbooba seeks EAM's intervention to save Indian nurse on death row in Yemen | India's higher education ecosytem has undergone fundamental transformation: Pradhan at VC conference | ED books 29 Actors, Influencers, YouTubers in online betting linked PMLA case | Govt to sell minority stake in LIC | Delhi cop receives extortion call of Rs 10 crore; FIR registered, probe on | Dogri song "Ambli Banage Daal" released in Jammu | "Rotary Club Jammu Elite and SIBA organize successful medical camp | Balwant Thakur to visit England from July 25 to expand Natrang's international network | Modi Govt sets new benchmark for corruption-free governance: Rohiin Chandan | JKAACL hosts "Meet the Author" event | Field office of Union Ministry of MSME organizes Seminar | Samba police arrests absconder | SHKSSJ celebrates Guru Purnima with devotion and grandeur | KSS celebrate Guru Purnima with traditional religious fervor | GAMC&H Akhnoor students visited Sitlee Water Purification Plant | Workshop on Bloom's Taxonomy to Empower Educators | SJVN organizes two-day Orientation Programme for CMDs and Directors of CPSEs | SJVN organizes two-day Orientation Programme for CMDs and Directors of CPSEs | SIPS Hosts CBSE Cluster XVIIl Kabaddi Tournament | SBSSU becomes first University in Punjab to implement mandatory "Entrepreneurship Mindset" curriculum | Preserving our ecosystem, a collective responsibility: Committee on Environment | KU holds special marathon for differently-abled students | Shreyanka, Sadhu named in India A squad to tour Australia, Radha to lead | New Delhi to host two major international shooting competitions in 2027-28 | Back Issues  
 
news details
‘One heatwave can trigger back-to-back hot spells’
4/15/2025 10:44:16 PM
NEW DELHI, Apr 15:
Agencies

A heatwave can create conditions in the environment conducive for the next one, which can increase the chances of back-to-back heatwaves, a new study has suggested.
A team of researchers from the Indian Institute of Technology Bombay and Germany’s Johannes Gutenberg-University Mainz looked at why South Asia experienced extreme heat events one after the other during March and April 2022.
Temperatures reached extraordinary levels for that time of the year across the region, including India and Pakistan, which were consistently 3-8 degrees Celsius above average. The prolonged period of hot weather continued into May, too.
The findings of the study, published in the Journal of Geophysical Research: Atmospheres, also showed a “concerning pattern,” whereby the succeeding heatwave is more intense, the researchers said.
The extreme heat of the first heatwave removes moisture from the soil, making it dry. Excess dryness can then trigger a cycle of atmospheric processes, making the next spell even worse, they said.
Co-author Arpita Mondal, associate professor at IIT Bombay, explains, “Think of it like this — when (the) soil has moisture, under clear sky conditions, some of the sun’s energy goes into evaporating that moisture rather than heating the air.”
“But when the soil is already dry, all that energy goes straight into making the air hotter,” she said.
Comparing the heatwaves of March and April, the team found that each was driven by a different atmospheric process — the former by winds in high altitudes and the latter by dry soil conditions, which were created as a result of the former.
“Our analysis shows that the March heatwave was primarily linked to a sudden increase in the amplitude of short-lived atmospheric Rossby waves, which are large-scale meanders in high-altitude winds, resembling bends in a winding river,” said lead author Roshan Jha, IIT Bombay.
“The waves grew stronger as high-altitude westerly winds near the poles (extratropical jet stream) transferred energy to westerly winds closer to the equator (subtropical jet stream) as they came closer during the heatwave,” Jha said.
However, the April heatwave was found to be triggered differently, primarily caused by very dry soil conditions and a transfer of heat to India from the northwestern land regions of Pakistan and Afghanistan.
Importantly, these dry conditions were partly created by the earlier March heatwave, which had already dried out the land through high temperatures and clear skies, the authors said.
“Our findings indicate that waveguide interaction together with equatorward energy transfer drives early heat in March, subsequently setting the stage for further heat in the following weeks by depleting soil moisture levels,” they wrote.
With a warmer future gaining more certainty in recent times, wind patterns continue to be affected and identifying these changes helps better predict and mitigate the impacts of future heatwaves, Subimal Ghosh, institute chair professor at IIT Bombay.
“Understanding these mechanisms is crucial for improving our ability to forecast and prepare for extreme heat events in South Asia,” said Ghosh.
The extreme heat events of March and April 2022 were estimated to have a chance of occurring once in 100 years, with climate change having made these events 30 times more likely, according to an attribution study published in 2023 in the journal Environmental Research Climate.
  Share This News with Your Friends on Social Network  
  Comment on this Story  
 
 
 
Early Times Android App
STOCK UPDATE
  
BSE Sensex
NSE Nifty
 
CRICKET UPDATE
 
 
 
 
 
 
 
 
   
Home About Us Top Stories Local News National News Sports News Opinion Editorial ET Cetra Advertise with Us ET E-paper
 
 
J&K RELATED WEBSITES
J&K Govt. Official website
Jammu Kashmir Tourism
JKTDC
Mata Vaishnodevi Shrine Board
Shri Amarnath Ji Shrine Board
Shri Shiv Khori Shrine Board
UTILITY
Train Enquiry
IRCTC
Matavaishnodevi
BSNL
Jammu Kashmir Bank
State Bank of India
PUBLIC INTEREST
Passport Department
Income Tax Department
JK CAMPA
JK GAD
IT Education
Web Site Design Services
EDUCATION
Jammu University
Jammu University Results
JKBOSE
Kashmir University
IGNOU Jammu Center
SMVDU