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The cold weather is likely to intensify in northwest India, including Delhi, during the next three days while isolated areas of some states may witness foggy mornings and evenings.
According to India Meteorological Department (IMD), the ongoing intense precipitation spell over Western Himalayan Region & adjoining plains will continue during the next 24 hours and significantly decrease thereafter. The weather agency said that Western Disturbance as a cyclonic circulation lies over north Pakistan & neighbourhoods in lower and middle tropospheric levels. It also said the induced cyclonic circulation lies over northeast Rajasthan and neighbourhood at lower tropospheric levels.
There was a very dense fog in isolated pockets over eastern Bihar in the last 24 hours. | Photo by Ankhesenamun on Unsplash
The confluence of winds from Arabian Sea and Bay of Bengal at lower tropospheric levels is very likely over central & East India during next 4-5 days. "Under its influence, scattered to fairly widespread light/moderate rainfall/snowfall is very likely over Western Himalayan Region till 10th and decreases significantly thereafter. Isolated heavy rainfall/snowfall is very likely over Himachal Pradesh on January 9," the IMD said.
It further forecasts that isolated to scattered rainfall is very likely to continue over Punjab, Haryana, Chandigarh & Delhi and West Uttar Pradesh on Sunday and decrease thereafter. Scattered to fairly widespread rainfall very likely over East Uttar Pradesh, East Madhya Pradesh, Vidarbha, Chhattisgarh during January 9-12. For Bihar, West Bengal, Sikkim, and Odisha, the IMD predicted scattered to fairly widespread rainfall during January 11-13.
The confluence of winds from Arabian Sea and Bay of Bengal at lower tropospheric levels is very likely over central & East India during next 4-5 days. | Photo by seth schwiet on Unsplash
In north east India, scattered to widespread rainfall is very likely over Arunachal Pradesh during January 11-13 and scattered to fairly widespread rainfall may occur over Assam & Meghalaya and Nagaland, Manipur, Mizoram & Tripura on January 12-13. For the past 24 hours, the IMD informed that isolated hailstorms occurred over Punjab, Madhya Pradesh and Vidarbha while minimum temperatures remained above normal by 3-5 degrees Celsius over many parts of Northwest and central India and near normal over the remaining parts of North India. There was a very dense fog in isolated pockets over eastern Bihar in the last 24 hours while dense fog engulfed isolated pockets of northeast Rajasthan, it added. (IANS/ MBI)
(Keywords: Delhi, dip, temperature, Assam, Meghalaya, Nagaland, Manipur, Mizoram,Tripura, northwest, Bihar, North India, fog, IMD)
The India Meteorological Department (IMD) on Friday warned of enhanced rainfall/snowfall with isolated heavy falls over Western Himalayan Region and enhanced rainfall activity over plains of northwest India till January 9. However, there will be no cold wave conditions likely over north India during the next 4-5 days.
"Fairly widespread to widespread light/moderate rainfall/snowfall over Western Himalayan Region is till January 9 and will decrease significantly thereafter. Isolated heavy rainfall/snowfall is expected over Jammu-Kashmir-Ladakh-Gilgit-Baltistan-Muzaffarabad on Saturday and Sunday," the IMD warning said. Isolated heavy rainfall/snowfall is very likely over Himachal Pradesh till January 9.
IMD on Friday warned of enhanced rainfall/snowfall with isolated heavy falls over Western Himalayan Region till January 9. | Wikimedia Commons
"The Western Disturbance as a cyclonic circulation lies over south Afghanistan and neighbourhood in lower and middle tropospheric levels with trough aloft in upper tropospheric levels. The induced cyclonic circulation lies over southwest Rajasthan and adjoining south Pakistan at lower tropospheric levels. "There is high moisture feeding from Arabian Sea over northwest and adjoining central India in lower and middle tropospheric levels and is very likely to continue during next 2-3 days. The confluence of winds from Arabian Sea and Bay of Bengal at lower tropospheric levels is very likely over central India during the next 4-5 days," the IMD bulletin said.
Fairly widespread to widespread light/moderate rainfall is very likely over Punjab, Haryana, Chandigarh and Delhi, north Rajasthan, Uttar Pradesh till January 9 and decrease significantly thereafter. Scattered to fairly widespread light/moderate rainfall very likely over Madhya Pradesh till January 11 and over Vidarbha and Chhattisgarh during 9 to 11."
Fairly widespread to widespread light/moderate rainfall is very likely. | Photo by Roman Synkevych on Unsplash
The IMD also predicted isolated thunderstorms with lightning/hail very likely over Uttarakhand, Rajasthan, Punjab, Haryana, Chandigarh, west Madhya Pradesh on Saturday, east Madhya Pradesh on Saturday and Sunday, Vidarbha on January 9 and 10 and over Chhattisgarh on January 10 and 11. (IANS/ MBI)
(Keywords: IMD, rainfall, snowfall, west, himalaya, cyclonic, january, weather cold wave)
With several achievements such as faster method of predicting space weather under its dome in 2021, the Indian Astronomical Observatory (IAO) located at Hanle near Leh in Ladakh has emerged as one of the promising observatory sites globally.
The obvious advantages of more clear nights, minimal light pollution, background aerosol concentration, extremely dry atmospheric condition and no interruption by monsoon are among the reasons that have made the Hanle Observatory a popular and a promising site belonging to Indian Institute of Astrophysics (IIA), Bengaluru.
Among its achievements are: "A faster method of predicting space weather has been identified in a type of solar radio bursts observed using the global network of solar radio telescopes called CALLISTO; a clue to the mystery behind the high abundance of Lithium, a trace element on Earth has been traced. An active galaxy found in a very bright state with 10 times more X-ray emission than normal, equivalent to more than 10 trillion of the Sun, and located five billion light-years away could help probe how particles behave under intense gravity and acceleration to the speed of light."
An algorithm that can increase the accuracy of data from exoplanets by reducing the contamination by the Earth's atmosphere and the disturbances due to instrumental effects and other factors has been developed while a new method to understand the atmosphere of extrasolar planets has been found.
"Besides, we now have clues to the mystery of solar flares and coronal mass ejections in regions on the Sun with disturbed magnetic fields that can help improve solar weather predictions," said a release.
Earlier in the year, researchers from India and their collaborators had carried out a detailed study of the nighttime cloud cover fraction over eight high altitude observatories, including three in India. They used re-analysis data, combined from assimilation and observation extending over 41 years along with 21 years of data from satellites.
The obvious advantages of more clear nights, minimal light pollution, background aerosol concentration, extremely dry atmospheric condition.Unsplash
The study classified the quality of observable nights for different astronomical usages like photometry and spectroscopy on a daily basis. They analyzed datasets for the IAO in Hanle and found that the Hanle site has nearly 270 clear nights in a year and is also one of the emerging sites for infrared and sub-millimeter optical astronomy.
After examining several years of data of various astro-climatological parameters, IIA had installed the two-meter aperture Himalayan Chandra Telescope at IAO, Hanle, during 2000.
Thereafter, due to the uniqueness of this site, several astronomical telescopes operating at optical and infrared wavebands have been installed at Hanle by several institutes in the country. (IANS/SP)
(Keywords : India, Leh, Ladakh, Hanle Observatory, achievements, predict, space, weather, Indian Astronomical Observatory, solar, radio, telescope, emission, galaxy, element, mystery, gravity, light, exoplanet, extrasolar, astronomy, photometry, spectroscopy, Himalayan Chandra Telescope.)
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The current global temperatures on Earth are unprecedented in the last 24,000 years, since the last ice age, according to a new study.
In the study, a team from University of Arizona created maps of global temperature changes for every 200-year interval going back 24,000 years.
The results showed that the main drivers of climate change since the last ice age are rising greenhouse gas concentrations and the retreat of the ice sheets.
It suggested that a general warming trend over the last 10,000 years, settled a decade-long debate about whether this period trended warmer or cooler in the paleoclimatology community.
Further, the study published in the journal Nature also showed that the magnitude and rate warming over the last 150 years far surpassed the magnitude and rate of changes over the last 24,000 years.
The fact that we're today so far out of bounds of what we might consider normal is cause for alarm and should be surprising to everybody," added lead study author Matthew Osman, by Markus Spiske on unsplash
"This reconstruction suggests that current temperatures are unprecedented in 24,000 years, and also suggests that the speed of human-caused global warming is faster than anything we've seen in that same time," said Jessica Tierney, a geosciences associate professor at the varsity.
"The fact that we're today so far out of bounds of what we might consider normal is cause for alarm and should be surprising to everybody," added lead study author Matthew Osman, a geosciences postdoctoral researcher also from the varsity.
To reconstruct past temperatures, the team combined two independent datasets-temperature data from marine sediments and computer simulations of climate-to create a more complete picture of the past.
The researchers looked at the chemical signatures of marine sediments to get information about past temperatures. Because temperature changes over time can affect the chemistry of a long-dead animal's shell, paleo climatologists can use those measurements to estimate temperature in an area. It's not a perfect thermometer, but it's a starting point.
Computer-simulated climate models, on the other hand, provide temperature information based on scientists' best understanding of the physics of the climate system, which also isn't perfect.
Now, the team is working on using their method to investigate climate changes even farther in the past.
Article originally published on IANSlife) (IANS/ AY)