Delhi records coldest November morning since 2003 as cold wave sweeps parts of city

-

New Delhi: Delhi's minimum temperature dropped to 6.9 degrees Celsius on Sunday, the lowest in the month of November since 2003, as a cold wave swept parts of the city.

The National Capital had recorded a minimum of 7.5 degrees Celsius on Friday, the lowest in the month in 14 years, according to the India Meteorological Department.

"The Safdarjung Observatory which provides representative data for the city, recorded a minimum of 6.9 degrees Celsius. It is Delhi's lowest minimum temperature in the month since November 2003, when the city recorded a minimum of 6.1 degrees Celsius," said Kuldeep Srivastava, the head of the IMD's regional forecasting centre.

The mercury dropped to 6.1 degrees Celsius at the Palam weather station, he said.

For the plains, the IMD declares a cold wave when the minimum temperature is 10 degrees Celsius or below and is 4.5 notches less than normal for two consecutive days.

However, for small areas such as Delhi, a cold wave can be declared if the criteria are fulfilled even for a day, Srivastava said.

Delhi had recorded the lowest minimum temperature of 11.5 degrees Celsius last year, 10.5 degrees Celsius in 2018 and 7.6 degrees Celsius in 2017 in the month of November.

The all-time record for the lowest minimum temperature in November is 3.9 degrees Celsius recorded on 28 November, 1938.

Srivastava said icy cold winds blowing from snow-laden western Himalayas have led to a dip in the mercury.

However, the minimum temperature will rise by two to three degrees Celsius in the next four to five days under the influence of a fresh Western Disturbance.

The minimum temperature this month, barring 16 November, has remained 2-3 degrees Celsius below normal in the absence of a cloud cover, according to IMD officials.

Clouds trap some of the outgoing infrared radiation and radiate it back downward, warming the ground.

The month of October was the coldest in 58 years in the national capital.

The mean minimum temperature in October this year was 17.2 degrees Celsius, the lowest since 1962, when it was 16.9 degrees Celsius.



from Firstpost India Latest News https://ift.tt/2UOAhgT
Press Trust of India

Comments

Post a Comment

Popular posts from this blog

Both COVID-19 vaccine doses needed for good protection against B16172 variant

-
It’s been a concerning few weeks in the UK, with the B16172 variant first taking hold and then spreading to become dominant. This more infectious form of the virus, initially identified in India, is what we’re now going to have to live with – unless it is out-competed by another variant in the future. Worryingly, experts had predicted that B16172 might be able to escape some of the effects of vaccines, which if true would threaten to derail the UK’s plans to finish lifting restrictions from the end of June. However, Public Health England (PHE) has looked at the ability of various variants to evade immunity and says that the UK’s vaccines remain effective against the variants circulating, including B16172. On the surface, this looks like good news. But delve a bit deeper, and things get more complicated, says Paul Hunter, professor of medicine at the University of East Anglia. PHE’s research found a little drop-off in protection against B16172 among people who were fully vaccinated.
Read more

New coronavirus variant emerge in India: How should our COVID response change?

-
Image
After genome sequencing of over 10,000 COVID-19 cases in India, researchers have discovered a new variant with two new mutations which may be better at evading the immune system. In 15-20 percent of samples from the Indian state of Maharashtra (the state accounting for 62 percent of cases in the country) a new, double mutation in key areas of the virus has been detected. These are now known as the E484Q and L452R mutations. What makes the variant different? Both these mutations are concerning because they are located in a key portion of the virus – the spike protein – that it uses to penetrate human cells. Spike proteins attach via a “receptor binding domain”, meaning the virus can attach to receptors in our cells. These new mutations include changes to the spike protein that make it a “better fit” for human cells. This means the virus can gain entry more easily and multiply faster. Given what we have seen with other similar mutations , it might also make it harder for our immu
Read more

Aditya L1 Mission: Spacecraft is nearing its final phase, says ISRO chief

-
Aditya L1 spacecraft is nearing its final phase, and manoeuvres to enter the L1 point are expected to be completed by January 7, 2024, according to ISRO Chairman S Somanath. “Aditya is on the way. I think it has reached almost its final phase,” the ISRO chief told PTI on the sidelines of an event organised at VSSC to commemorate the 60th year of the First Sounding Rocket Launch. Aditya L1, India’s first space-based mission to study the Sun, was successfully launched on September 2 from the Satish Dhawan Space Centre (SDSC) in Sriharikota. The spacecraft, after travelling about 1.5 million km from Earth over 125 days, is expected to be placed in a Halo orbit around the Lagrangian point L1, considered closest to the Sun. He said that the last preparations for the spacecraft’s entry into the L1 point are currently underway incrementally.”Possibly by January 7th, the final manoeuvres will be done for entering into the L1 point,” Somanath added. Among other tasks, it will capture and tr
Read more