Record melt: Greenland lost 586 billion tonnes of ice in 2019
Nuuk: Greenland lost a record amount of ice during an extra warm 2019, with the melt massive enough to cover California in more than four feet of water, a new study said.
After two years when summer ice melt had been minimal, last summer shattered all records with 586 billion tons (532 billion metric tons) of ice melting, according to satellite measurements reported in a study Thursday.
That's more than 140 trillion gallons (532 trillion litres) of water.
That's far more than the yearly average loss of 259 billion tons (235 billion metric tons) since 2003 and easily surpasses the old record of 511 billion tons (464 billion metric tons) in 2012, said a study in Nature Communications Earth & Environment. The study showed that in the 20th century, there were many years when Greenland gained ice.
Not only is the Greenland ice sheet melting, but it's melting at a faster and faster pace, said study lead author Ingo Sasgen, a geoscientist at the Alfred Wegener Institute in Germany.
Last year's Greenland melt added 0.06 inches (1.5 millimeters) to global sea level rise.
That sounds like a tiny amount but in our world it's huge, that's astounding, said study co-author Alex Gardner, a NASA ice scientist. Add in more water from melting in other ice sheets and glaciers, along with an ocean that expands as it warms - and that translates into slowly rising sea levels, coastal flooding and other problems, he said.
While general ice melt records in Greenland go back to 1948, scientists since 2003 have had precise records on how much ice melts because NASA satellites measure the gravity of the ice sheets. That's the equivalent of putting the ice on a scale and weighing it as water flows off, Gardner said.
As massive as the melt was last year, the two years before were only on average about 108 billion tons (98 billion metric tons). That shows that there's a second factor called Greenland blocking, that either super-charges that or dampens climate-related melting, Gardner said.
In the summer, there are generally two factors in Greenland's weather, Gardner said. Last year, Greenland blocking - a high pressure over Canada that changes the northern jet stream - caused warm southern air to come up from the United States and Canada and flow into Greenland, forcing more melting.
In 2017 and 2018 without Greenland blocking, cooler Arctic air flowed from open ocean into Greenland, making summer milder, he said.
This year, Greenland's summer melt has been not as severe, closer to normal for recent times, said Ruth Mottram, an ice scientist at the Danish Meteorological Institute, who wasn't part of Sasgen's research.
Mottram and several other outside scientists said Sasgen's calculations make sense. In her own study this month in the International Journal of Climatology, she found similar results and also calculated that Greenland coastal regions have warmed on average 3 degrees (1.7 degrees Celsius) in the summer since 1991.
The fact that 2019 set an all-time record is very concerning, said New York University ice scientist David Holland, who wasn't part of either study.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Rajnath Singh chairs IGoM meet, urges constant vigil over West Asia crisis
New Delhi (PTI): Defence Minister Rajnath Singh on Thursday emphasised the need for round-the-clock monitoring of the West Asia conflict and called for a calibrated response to deal with any eventuality to ensure that national interests remain protected.
Singh made the comments while chairing a high-level meeting of the Informal Group of Ministers (IGoM) set-up to monitor the situation in West Asia.
The meeting was attended by External Affairs Minister S Jaishankar, Finance Minister Nirmala Sitharaman, Oil Minister Hardeep Singh Puri, Power Minister Manohar Lal, Chemicals and Fertilizers Minister J P Nadda, Consumer Affairs Minister Prahlad Joshi and Minister of Railways, Information and Broadcasting, Electronics and Information Technology Ashwini Vaishnaw.
In view of the "uncertain situation", the defence minister underlined the importance of round-the-clock monitoring of the situation and the need to respond in a calibrated manner to deal with any eventuality, an official readout said.
He stressed on the need to leave no stone unturned to ensure that the people of the country face the minimum effect of the conflict, it said.
It was the second meeting of the IGoM after it was set up last month.
The IGoM was apprised of the measures being taken by the government in the wake of the ongoing West Asia conflict, Singh said on social media.
"We also deliberated upon the next steps to be taken by the government to mitigate any adverse impact arising due to the ongoing conflict," he said.
The defence ministry said in the readout said, "In the meeting, the seven empowered groups of secretaries briefed the IGoM on the steps being taken to tackle the situation."
"The IGoM was apprised about measures undertaken by the Ministry of Finance to address concerns arising due to global trade disruptions and provide relief and support to the industry, especially manufacturing, and bolster investor confidence," it said.
It listed measures including notification issued on Wednesday on full customs duty exemption on 40 critical petrochemical products till June 30.
The ministry also mentioned announcement of a special one-time relief measure for eligible units in SEZs to sell manufactured goods in Domestic Tariff Area (DTA) at concessional customs duty rates to be effective from April 1 to March 31.
It also noted another notification issued by the Department of Revenue clarifying that the provisions of GAAR (General Anti Avoidance Rules) will not be invoked in respect of investments made prior to April 1, 2017.
"These measures will reduce cost pressures on downstream sectors including textiles, packaging and pharmaceuticals, facilitate supply stability in the country and provide requisite clarity for investors contemplating investments in India," the readout said.
Defence Minister Singh appreciated the government's decision to impose a 25 per cent cap on the monthly increase in aviation turbine fuel prices for domestic operations, with effect from April 1.
This step will help protect the people from sudden increase in fares, he said.
The government has accorded highest priority to domestic LPG supply, with refinery production enhanced to fully meet consumption requirements, according to the readout.
"The IGoM was informed that there have been no reports of dry-out at LPG distributorships, and delivery of domestic LPG (liquefied petroleum gas) cylinders continues as per the normal schedule. The temporary supply concerns arose due to instances of hoarding and black marketing, which triggered panic buying in certain areas," it said.
The ministers were informed that strict enforcement action is being undertaken, with raids being carried out across multiple states and Union territories to curb hoarding and black marketing of LPG, the ministry said in the readout.
Action has also been taken against some LPG distributors who engaged in malpractices, it said.
"To support migrant labour and low-consumption households, the government is ensuring adequate availability of 5 kg free trade LPG cylinders, and since March 23, over 4.3 lakh such cylinders have been sold. Special focus is being given to states where demand is higher," it said.
The IGoM was apprised that industrial requirements dependent on commercial LPG are being met, with over 80 per cent of pre-crisis supply levels being maintained to ensure continuity of operations.
"Special meetings have been held with ministries and stakeholders of different industries to understand their demand and meet their needs. Oil PSUs are ensuring continued supply of Auto LPG across the country," the readout noted.
"However, some supply constraints are being faced by private operators due to their procurement challenges, which is why lines are being observed at PSU auto LPG pumps. Wherever the autos are dual feed and can use petrol, they are being encouraged to use petrol," it said.
