10 Fascinating New Things We Learned About Dinosaurs In 2017

  • Published in World
10 Fascinating New Things We Learned About Dinosaurs In 201710 Fascinating New Things We Learned About Dinosaurs In 2017

2017 has been a busy year for paleontologists and dinosaur aficionados worldwide. They found some new species, invalidated some old ones, and even resurrected a forgotten species from the dead. They learned new things about dinosaur behavior and patched a few holes in our understanding of the evolution of these animals. The year wasn’t free [

Read more...

Urbanisation is punching holes in north India’s winter fog


The high level of local pollution is burning the fog over cities in the Indo-Gangetic Plains (IGP), with Delhi recording the maximum “fog holes” during winter, a study that analysed 17 years of satellite data from NASA shows.

The paper ‘Urban Heat Island over Delhi punches Holes in Widespread Fog in the Indo-Gangetic Plains’ by the Indian Institute of Technology Bombay (IIT-B) and University of Petroleum and Energy Studies, Dehradun, was published in the journal Geophysical Research Letters by the American Geophysical Union on January 8.

The researchers said this is the first study that shows the direct impact and evidence of urban hotspots in fog globally, and specifically over Delhi.

The two-member team found more than 90 occurrences of fog holes in Delhi, where the incidence of fog has dipped by over 50% between 2006 and 2016.

The area covers more than 700 square kilometres making it the largest in terms of frequency and extent as compared to the Po Valley in Italy, north China plains and California’s Central Valley, which experience similar phenomena.

With land surface temperatures over Delhi recorded at around four to five degrees Celsius higher compared to its rural surroundings, researchers said the formation of urban heat islands burns the base of the fog layer during mid-morning.

The urban heat island is a phenomenon when the heat gets trapped near the earth’s surface as a result of a decline in green cover, rapid urbanisation, energy-intensive activities, and concrete structures. For instance, vegetation cover in rural areas surrounding Delhi is more than 65% compared to the city.

Relative humidity, which should be about 95%, is a key factor for fog formation. When surface temperatures increase due to urban heat island effect, there is a decrease in relative humidity which is not conducive to form fog droplets,” lead investigator and senior physical scientist at Washington’s Environmental Defense Fund, Ritesh Gautam, said.

High humidity levels are important since the air has to be saturated enough with water vapour so that it can condense on pollutants or particles in the air to form fog near the ground,” Gautam, a former IITB professor, added.

Delhi witnessed more than a 50% decrease in fog cover. Between 2008 and 2016, the city recorded fog holes for 55 days, despite a 20% increase in fog at a distance of 15km to 30km from the city centre during the study period. The team also found a fourfold decrease in the thickness of the fog around the edges of the hole over Delhi as compared to its surrounding.

Across the IGP that runs across 1,800km, there was a 17% to 36% decline in fog cover across Amritsar, Jalandhar, Patiala, Ludhiana and Lahore. These five cities had 24 to 32 days of fog holes.

Fog is an important climatic feature as it affects local vegetation and weather and fog mixed with pollutants create problems.

Our study suggests that links between urbanisation and fog dynamics and its frequency should be assessed to better understand the relationships between fog, air pollution and urbanisation, and help advance the development of fog forecasting capabilities,” said Gautam.

Increasing urbanisation may make fog rarer, but there could be some benefits from the change.

We have a situation where fog is getting amplified by air pollution but urbanisation is decreasing fog. As more urban cities come up, we won’t be able to see the fog but will see holes. However, the fog over Delhi and other places is so notorious that may be urbanisation is helping to keep the polluted fog intensity over Delhi low,” said Gautam.

The findings from the study are important since dense and polluted winter fog in the IGP — with a population of more than 900 million — envelopes north India, Pakistan, Nepal and Bangladesh every year from December to January severely affecting air quality and disrupting air, rail and road traffic.

Madhavan N Rajeevan, the secretary at the Union ministry of earth sciences, said the study will be very useful in understanding the process of why fog occurs and ultimately to predict its occurrence.

Though we know the basic principles and processes by which fog occurs, its prediction is a very tricky issue. Fog occurrence may vary depending on local conditions such as different topographies or urban heat islands that play an important role in its formation,” Rajeevan said.

Read more...

I wish to finish my studies: Sapna Chaudhary

Authors: Ecroaker. com Boosters.

Singer-dancer Sapna Chaudhary, the latest to be evicted from Bigg Boss 11, says her childhood dream was to be the best student of the class, and now she wants to fulfil it by finishing her education. Sapna started working when she was all of 12 to support her family after her father’s death.

Asked about one of the dreams she wants to pursue, Sapna said, “I wish to finish my studies. I was good in studies and history was my favourite subject. We were financially so poor that I had to discontinue my education. Later, I never even told my mother about my desire to study because education for me was nothing but luxury at that time. Now that I have a little stability in life, at least financially, I want to study.

She feels “fresh” after coming out of the Bigg Boss house. have no complaints. I think I managed to serve my purpose of entering the house. I think one shouldn’t get attached to anything emotionally inside the house because there’s a lot of competition inside and people do not think from the heart, but the head. condly, I could have survived for more days if I would have built up a friendship with participants there. That happened in the end though,” said Sapna, who wants to stay in touch with Hina Khan, Priyank Sharma and Akaash Dadlani from among the participants on the show.

Being a dancer from Haryana, Sapna believes that in north India, girls do not get respect if they work as stage dancers. Her aim via Bigg Boss was to help bring about a change in that mindset. Yes, we entertain people on stage, but that is my job. That does not mean that in my regular days, anyone, especially men, can walk up to me to tease or look at me with vulgarity in their eyes. Our job does not allow them to disrespect or misbehave with us. Keeping the profession aside, we are normal women. We run our kitchen from whatever we earn and we have responsibilities. Men have no right to look down upon us and treat us like disrespectful entities,” asserted Sapna.

Overwhelmed to meet Bollywood superstar Salman Khan courtesy Bigg Boss, Sapna wishes to shift to Mumbai and work in films. Especially a dance number in Salman’s film, she said.

Read more...
Subscribe to this RSS feed