National
Urban heat island punches holes through Delhi fog
By K.S. Jayaraman
Bengaluru, Jan 11 (IANS) An analysis of satellite images obtained over the last 17 years has revealed a striking observation of massive holes being formed in the fog over Delhi each year in the winter months of December and January.
A report in the journal Geophysical Research Letters published by the American Geophysical Union says “fog holes” are observed in urban areas globally — especially over Delhi.
Dense and polluted fog in the Indo-Gangetic Plain blankets northern India, Pakistan, Nepal and Bangladesh every year during the winter months, severely disrupting air, rail and vehicular transportation.
Using 17 years of data from NASA’s MODIS satellite, researchers Ritesh Gautam — formerly Professor at IIT Bombay and now a scientist with the US Environmental Defense Fund in Washington — and Manoj Singh of the University of Petroleum and Energy Studies in Dehradun, have derived a long-term climatological distribution of fog occurrences in Asia, Europe and the US.
“We found fog holes globally but the largest frequency and extent of fog holes is observed over Delhi,” Gautam told this correspondent.
According to the report, “a strong statistically significant correlation” was found between urban heat islands and fog hole area over multiple fog-prone cities in the Po valley (Milan/Italy), North China Plain (Beijing, Tianjin) and California’s central valley.
“The extent of fog holes appear highly correlated with city populations in fog-prevalent regions of Asia, Europe and the US and we find the largest extent of fog holes over Delhi,” says the report.
“While air pollution is known to hasten fog formation, our findings suggest the urban heat island over Delhi causes the fog to burn off faster, causing massive holes,” Gautam said.
The study found more than 90 occurrences of fog holes over Delhi during the winter months. An analysis of eight-year data (2009-2016) found that fog holes were the most frequent over Delhi with their formation in as many as 55 days during December-January.
“This apparent urban heat impact is characterised in sharp urban-rural gradients in surface temperatures and fog thickness,” the report says.
“Urban heating seems to have already amplified the long-term fog decline in Europe and US and should be assessed over regions undergoing urban expansion, including India, where no previous linkages are reported between urban heating and fog.”
The finding of fog holes contributes in general to the better understanding of fog dynamics over urban heat islands globally, but specifically over Delhi, where the air quality is at its worst in winter, impacting public health, the report says.
In addition to Delhi, in the Indo-Gangetic Plains, fog holes also appear frequently over Lahore, Amritsar, Jalandhar, Ludhiana and Patiala, says the report.
Satellite data analysis showed that 24-32 fog holes were formed over these five cities which are “urban hot spots distributed amidst green vegetated cover in Punjab”.
According to the authors, this is the first study showing direct impact and evidence of urban hotspots on fog globally and specifically over Delhi.
The authors suggest that links between urbanisation and fog dynamics and its frequency should be assessed “to help better understand the relationships between fog, air pollution and urbanisation as well as help advance development of fog forecasting capabilities”.
“In addition, our findings will also provide key information to the air/rail/vehicular transport sector in terms of timing and processes of fog dissipation,” they add.
(K.S. Jayaraman is a veteran science journalist. He can be contacted at [email protected] )
–IANS
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National
Foodman Vishal Singh Honored for Hunger Free World Mission in Bangkok
Lucknow: Vishal Singh, a renowned social worker from Lucknow, also known as Foodman, has once again made India proud. He was honored by the Happy Hands Gloves Cooperative Limited Company in Korathai, Thailand, for his work with the Hunger Free World Mission.
The Hunger Free World Mission’s meeting was held in Korathai, Thailand, under Vishal Singh’s leadership. Representatives from several countries, including Mr. Raja Dwivedi (Managing Director of Happy Hands Gloves Limited), Thailand Coordinator Mr. Raja Mishra, and member Mr. Varun Singh, attended the event.
Under Vishal Singh’s leadership, the attendees took a pledge to work together toward creating a hunger-free world.
Speaking on the occasion, Vishal Singh explained that the main goal of the Hunger Free World Mission is social participation. He said the mission is not just about feeding people but also about meeting other basic needs of those who are struggling. The mission focuses on helping families of terminally ill patients in hospitals by providing food and shelter. It also works to fulfill essential needs like education, jobs, and care for the elderly.
For the last 16 years, the Vijay Sri Foundation has been providing free services, benefiting thousands of people. Vishal Singh highlighted that the mission aims to gain global recognition like other organizations such as WHO, WWF, and Red Cross, which work for social causes.
During this meeting, Vishal Singh was appointed as the Chairman of the Hunger Free World Mission by representatives from various countries. They also discussed holding regular meetings in different countries to push the mission forward.
Business tycoon Dr. Abhishek Verma has also supported this humanitarian mission, vowing to promote the idea of “Seva Parmo Dharma” (Service is the highest duty) worldwide. Vishal Singh praised him, stating that people like Dr .Abhishek Verma inspire others to work for the betterment of society.
Recently, Romania’s Ambassador, Mr . Daniela Sezonov Ţane, invited Vishal Singh to the Romanian Embassy in Delhi, where they discussed the mission in detail. Impressed by his humanitarian work, she honored Vishal Singh and invited him to Romania to take the mission forward .
Food man Vishal Singh has been serving the people of India for the past 16 years. Through the Vijay Sri Foundation, he provides free meals to cancer patients & their families ,shelter, and education for women & children along with running free old-age homes in Lucknow.
In addition to his humanitarian work, Vishal Singh also addresses issues like crime and corruption through his role as Chairman of Seva Path Media and Managing Director of Vijay Sri Foundation.
During the COVID-19 pandemic, Vishal Singh and his team worked tirelessly to provide food and help to the needy, including starving children, elderly citizens, and pregnant women. Despite contracting the virus himself, he continued to assist others after his recovery. He even created a life-saving oxygen regulator using household items, which was praised by doctors both in India and abroad.
In his address at the meeting, Vishal Singh spoke about his mission to create a hunger-free world. He pointed out that India’s large population, along with issues like unemployment and poverty, has caused the country to fall on the Hunger Index. He urged people to contribute just one handful of grains daily to help create a hunger-free world.
He concluded by saying that through social participation, we can empower the people around us, meet their basic needs, and work together to build a stronger, more prosperous, and developed society.