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Warming Greenland ice sheet passes point of no return

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Even if the climate cools, study finds, glaciers will continue to shrink

Nearly 40 years of satellite data from Greenland shows that glaciers on the island have shrunk so much that even if global warming were to stop today, the ice sheet would continue shrinking.

The finding, published today, Aug. 13, in the journal Nature Communications Earth and Environment, means that Greenland’s glaciers have passed a tipping point of sorts, where the snowfall that replenishes the ice sheet each year cannot keep up with the ice that is flowing into the ocean from glaciers.

“We’ve been looking at these remote sensing observations to study how ice discharge and accumulation have varied,” said Michalea King, lead author of the study and a researcher at The Ohio State University’s Byrd Polar and Climate Research Center. “And what we’ve found is that the ice that’s discharging into the ocean is far surpassing the snow that’s accumulating on the surface of the ice sheet.”

King and other researchers analyzed monthly satellite data from more than 200 large glaciers draining into the ocean around Greenland. Their observations show how much ice breaks off into icebergs or melts from the glaciers into the ocean. They also show the amount of snowfall each year — the way these glaciers get replenished.

The researchers found that, throughout the 1980s and 90s, snow gained through accumulation and ice melted or calved from glaciers were mostly in balance, keeping the ice sheet intact. Through those decades, the researchers found, the ice sheets generally lost about 450 gigatons (about 450 billion tons) of ice each year from flowing outlet glaciers, which was replaced with snowfall.

“We are measuring the pulse of the ice sheet — how much ice glaciers drain at the edges of the ice sheet — which increases in the summer. And what we see is that it was relatively steady until a big increase in ice discharging to the ocean during a short five- to six-year period,” King said.

The researchers’ analysis found that the baseline of that pulse — the amount of ice being lost each year — started increasing steadily around 2000, so that the glaciers were losing about 500 gigatons each year. Snowfall did not increase at the same time, and over the last decade, the rate of ice loss from glaciers has stayed about the same — meaning the ice sheet has been losing ice more rapidly than it’s being replenished.

“Glaciers have been sensitive to seasonal melt for as long as we’ve been able to observe it, with spikes in ice discharge in the summer,” she said. “But starting in 2000, you start superimposing that seasonal melt on a higher baseline — so you’re going to get even more losses.”

Before 2000, the ice sheet would have about the same chance to gain or lose mass each year. In the current climate, the ice sheet will gain mass in only one out of every 100 years.

King said that large glaciers across Greenland have retreated about 3 kilometers on average since 1985 — “that’s a lot of distance,” she said. The glaciers have shrunk back enough that many of them are sitting in deeper water, meaning more ice is in contact with water. Warm ocean water melts glacier ice, and also makes it difficult for the glaciers to grow back to their previous positions.

That means that even if humans were somehow miraculously able to stop climate change in its tracks, ice lost from glaciers draining ice to the ocean would likely still exceed ice gained from snow accumulation, and the ice sheet would continue to shrink for some time.

“Glacier retreat has knocked the dynamics of the whole ice sheet into a constant state of loss,” said Ian Howat, a co-author on the paper, professor of earth sciences and distinguished university scholar at Ohio State. “Even if the climate were to stay the same or even get a little colder, the ice sheet would still be losing mass.”

Shrinking glaciers in Greenland are a problem for the entire planet. The ice that melts or breaks off from Greenland’s ice sheets ends up in the Atlantic Ocean — and, eventually, all of the world’s oceans. Ice from Greenland is a leading contributor to sea level rise — last year, enough ice melted or broke off from the Greenland ice sheet to cause the oceans to rise by 2.2 millimeters in just two months.

The new findings are bleak, but King said there are silver linings.

“It’s always a positive thing to learn more about glacier environments, because we can only improve our predictions for how rapidly things will change in the future,” she said. “And that can only help us with adaptation and mitigation strategies. The more we know, the better we can prepare.”

This work was supported by grants from NASA. Other Ohio State researchers who worked on this study are Salvatore Candela, Myoung Noh and Adelaide Negrete.

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Dussehra (victory of good over evil)

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Dussehra Is celebrated to represent victory of good over evil means prabhu Rama over Ravana in famous hindu epic Ramayan. Also it means the end of durga puja & Ramlila. In Ramayan, Ravana kidnaps god Rama’s wife Sita, as god Rama & Laxman cuted of the nose of ravna’s sister surpanakha so to claim vengeance on them Ravana kidnapped sita. To get back maa sita prabhu Rama & Laxman faught battel against Ravana with the help of hanuman, subriv & other vanar sena. In this battel Rawan’s brother Bhibishan also helped him against Ravan . at the end of prabhu Ram wins the battel and rescues sita. Thereafter this victory is celebrated by burning the statue of Ravan, kumbhakarn, his son meghnath. Dasehra is a climax of long day celebration of Navratri.

           The nine days of Navratri is the time to reflect on oneself, observe silence & practice fasting. Fasting cleanses the body of toxins and silence purifies speech & mind. what does dasehra means das means ten and hara means take away. Which came after Navratri means nine nights if darkness.  On each day of Navratri we pray to that form of goddess durga to take away that darkness of ignorance within us and after that on tenth day on the occasion of dasehra we burn all the evil, bad things, thoughts, bad habbits inside us in that fire in the form of Ravna as evil inside us.

Ravan is not the demon or evil outside you it is inside you. In the battel of Ram and Ravana, god ram had been invoked durga to help him win the battel against Ravan, And he won. We also should invoked god durga to help us in gaining back our sita. Now what is sita?  It is awareness inside is which has been traped in maya surround us. To make our soul clean and pure we have to burn the evil in the fire by wining the battel against it which lies inside us that’s what dasehra symbolize.

It is a supreme festival of Hindu culture with true meaning. It also symbolize the feminism as the battel is to gain maa Sita again back as Ravan has kidnaped her. whenever  man crosses his limit and try to hurt marayda of stree. She will become god durga and make him to death. When the Rama wins then there is only light. So choice is ours. Either we become Ravana & get entrapped in the worldly pleasure or become Rama (A spiritual being)

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Know what you have celebrated these 9 days!

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The Celebration of Good over Evil

Navaratri is the opportunity for removal of vanity and evil influences and learning to achieve the ultimate truth and meaning of life through spiritual means.

Navaratri (Nava-nine; Ratri-nights) is usually celebrated, as its name suggests, within a span of 9 nights and 10 days. It falls on the Ashvin month according to the Hindu calendar. It celebrates the victory of good over evil; the defeat of negative energies by the righteous or morally upright. The rituals performed during Navaratri is dedicated to Devi Ma, the divine feminine. Each night is dedicated to the worship of nine personalities (Navadurga) and express gratitude to the Mother Divine. Devi is considered as the omnipresent cosmic energy. Devotees often fast, meditate, pray and perform certain rituals.

The rituals are followed by external festivities such as cultural functions and fairs. Cultural functions include Garba/ Dandiya nights and other social functions whereas rituals include Ghatasthapana and other spiritual activities. Women gather up in various societies and perform their rituals together.

But things have changed amidst this Pandemic. People are avoiding social gatherings. They are visiting temples with their masks on and abiding by the guidelines of the Government by following the social distancing norms. Most of the relatives are greeting each other via online platforms and celebrating this auspicious occasion by face-timing each other.

According to sources, many cities (like Indore, Raipur, etc.) have cancelled Garba nights, thus, leaving the hearts of many youngsters broken. Each State Government has taken precautions not to let more than 100 people assemble anywhere.

Jagaran reports that Prayagraj is celebrating Shardiya Navaratra in a unique manner. Famous singers across the city are preparing for devotional songs and performing them via online platforms so that people can get access to the divine celebration by staying at home as well.

Navaratri’s focus is to show reverence to the creation which is a gift of Devi Ma and it is rightly done if we start respecting our Mother Earth in the right terms.

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Why do we have blood types?

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Blood is bodily fluid that circulates through body and deliver essential nutrients and oxygen to every cell of our body.

For thousands of years nobody really understood blood. A greek doctor from 200 BC believed that blood was created from food and liver, this thought lived nearly 1500 years. It was early 17th century when a British ‘Dr. William Harvey’ discovered that blood circulated circulated through body. This experiment spawned the age of blood transfusion. In 1665 an english physician successfully kept one dog alive by transfusing blood of another dog into his body. Later after two years doctors experimented transfusing animals blood into human body in which the human patient died due to blood clotting.

It wasn’t until 1900s when ‘Dr. Karl Landsteiner’ understood that animals even humans have different blood. He later researched on blood and developed a system to categorize blood type known as A-B-O blood group system. Dr. Landsteiner traced transfusion complication like death and blood clot is caused by two things Antigens and Antibodies. Antigen is anything that triggers our immune system to respond. Usually viruses and Bacteria fall in this category, usually our immune system recognize these invaders and deploy antibodies to destroy them. Antibodies are proteins produced by our immune system that can recognize, investigate and if needed can destroy Antigens.But our own body also produce some Antigens called Self-Antigens which our immune system leave them alone. The whole A-B-O group system  is based upon these sugar based Self-Antigens and corresponding protein based antibodies. 

Depending upon the presence and absence of these Antigens and Antibodies our blood is divided into four types. Type A blood has A-antigen on blood and B-antibody in plasma. Type B blood has B-antigen on blood and A-antibody in plasma. Type AB has both A-antigen and B-antigen with no Antibodies in plasma. Type O has both A-antibody and B-antibody with no Antigens on blood. 

The positives and the negatives after our blood type is given by detecting the presence or absence of Rh protein based Antigen. Presence of Rh protein gives positive sign after blood type while absence gives negative sign after blood type. 

Blood is foremost the most important fluid in our body. By understanding our blood we can ensure tranfusing right blood type to the needy ones.

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