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Greenland is losing ice seven times faster than expected

Credit: University of Leeds / Youtube

Greenland is ceasing to be that vast white territory because it is losing ice at a speed seven times faster than in 1990.

The fatal scenario goes according to the context of global warming of Intergovernmental Panel on Climate Change (IPCC), which would expose 400 million people to coastal flooding in the year 2100.

A joint work of 96 scientists from 50 international organizations has generated the most detailed image so far of the ice loss from Greenland.

The team called Ice Sheet Mass Balance Inter-comparison Exercise (IMBIE) used 26 surveys to calculate changes in the Greenland ice sheet mass between 1992 and 2018.

The worst case scenario

The research results show that Greenland has lost so far 3.8 billion tons of ice, since 1992. This thaw is enough to raise the sea level by 10.6 millimeters.

The figures are alarming as they show a seven-fold increase in ice loss in just three decades.

Aerial photograph of icebergs discharging from the Jakobshavn glacier in Greenland Credit: William Colgan, Geological Survey of Denmark and Greenland

In 2013, the IPCC predicted that worldwide sea level would rise 60 centimeters by 2100, leaving 360 million people at risk due to coastal flooding. However, the new study shows that the ice loss is increasing faster than expected, which would generate an increase of even 7 centimeters more at sea level.

Andrew Shepherd in the University of Leeds, lead author of the research, he said in a statement:

As a general rule, for every one-centimeter increase in global sea level, another six million people are exposed to coastal flooding across the planet.

According to current trends, the melting of ice in Greenland will cause 100 million people to flood each year at the end of the century, which adds up to 400 million in total due to all the sea level rise. These are not unlikely events or small impacts; they are happening and will be devastating for coastal communities. ”

Caused by warming

The climate models regionals used by the team of researchers showed that half of the ice loss was due to rising air temperatures. The other half was caused by the rising ocean temperature.

Download glaciers that split icebergs in the waters of the Mogens Heinesen fjord in southwest Greenland. Credit: Benoit Lecavalier

The doctor. Erik Ivins of the Jet Propulsion Laboratory NASA and lead author of the study said in a statement:

Polar ice satellite observations are essential to monitor and predict how the climate change could affect ice losses and sea level rise. While computer simulation allows us to make projections from climate change scenarios, satellite measurements provide irrefutable evidence. ”

The team expects to continue monitoring the ice reduction in Greenland to determine the possible sea surge each year.

The research findings have been published in the journal. Nature.

Source: Leeds University / Phys.org

Planet Earth

Preschooler raised 200 thousand dollars to save animals in Australia

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Owen Collie is only 6 years old, he lives with his parents in Massachusetts, USA. While in kindergarten, he found out about Australia’s terrible fires causing millions of animals to die. The boy felt sorry for the koalas, kangaroos, dingo dogs and other animals of this continent, so sorry that he asked his mother how can these poor animals be helped? 

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But his mother did not know the answer, although, after thinking, she offered her son a very interesting project to save Australia’s nature. They began to sculpt clay koalas and send souvenirs to anyone who wants to financially help animals in Australia. To do this, it’s enough to buy a clay figure for $ 50, that is, to donate such an amount to a noble cause.

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The project went online and was successful, probably, first of all, thanks to the boy’s craving to help the poor animals. Now Owen masters one clay figure in 4 minutes, it takes about 20 minutes to roast it in a special furnace, and then these small souvenirs are sent by mail to everyone who has expressed a desire to participate in this amazing project.

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And there were a lot of people willing to give. In the first week only, the Collie family raised 200 thousand dollars to save the nature of Australia. And this project is ongoing, a project initiated by the most ordinary kid from the USA. Or maybe this kind boy is not quite ordinary, do you think?

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Planet Earth

New unknown viruses have appeared on a Tibet glacier

Unknown viruses from Earth’s ancient past have been found in the Tibetan glacier, which poses a risk if these viruses reach the atmosphere.

As the climate of our planet seems to be getting warmer, melting glaciers can lead to the appearance of previously unknown pathogens.

These agents remain inactive in the ice but do not die, scientists warn.

After examining a couple of ice cores extracted from an ancient glacier located in the Tibetan Plateu, a team of US scientists discovered about 33 viral populations.

And of those 33, 28 of them had never been seen before, according to Live Science.

The researchers warned that as glaciers around the world decrease, this trend could lead to the loss of such “microbial and viral archives” that offer a unique insight into the “climatic regimes” passed from Earth.

“However, in the worst case, this melting of ice could release pathogens into the environment,” they say.

The study of the viruses in question is complicated by the fact that the two ice cores, originally extracted in 1992 and 2015, can easily become contaminated with bacteria.

“This study establishes ultra-clean microbial and viral sampling procedures for glacier ice, which complements the previous decontamination methods on silica and expands, for the first time, clean procedures to viruses,” the scientists wrote.

“The application of these methods to glacier ice confirmed previous common microbiological findings for a new ice core climate record.”

“It provides a first window to viral genomes and their glacial ice ecology across two time horizons, and emphasizes their likely impact on abundant microbial groups.”

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Planet Earth

ESA launches space mission to measure Earth’s climate change

The European Space Agency (ESA) approved a new mission that aims to measure the climate changes that are happening on Earth. Its main objective will be to provide an accurate measure of the light reflected on Earth.

ESA launches space mission to measure Earth's climate change
Art: The TRUTHS satellite will work with other satellites to calibrate and validate observations. UKSA / NPL

Known as Traceable Radiometry Underpinning Terrestrial- and Helio-Studies (TRUTHS), the mission was approved by ESA after a meeting with scientists and engineers from its member states.

The scientific aspect of the mission will be addressed by the National Physical Laboratory (NPL) of Great Britain, which plans to equip the TRUTHS satellite with an instrument known as a cryogenic radiometer. This device is used to accurately measure the intensity of a light source.

Using this instrument in conjunction with a hyperspectral camera, TRUTHS will measure how much light is being reflected on the Earth’s surface. This includes the planet’s oceans, deserts, snow fields and forests.

As the data that will be collected by TRUTHS will be the first of its kind, it will serve as a standard for Earth’s reflectivity. They can be used and compared with new data that will be collected in future missions 10 to 15 years from now.

According to the scientists, the information that will be collected by the TRUTHS satellite may help policy makers to approve plans and regulations aimed at environmental issues.

By having a clear idea of ​​the amount of light reflected on Earth, scientists will be able to monitor the planet’s climate fingerprint. Specifically, they will be able to measure the heat radiating from the planet. Future missions can use TRUTH data to check changes in Earth’s climate.

Professor Nigel Fox of the NPL said in a statement, according to BBC:

In doing so, we will be able to detect subtle changes much sooner than with our current observation system.

This will allow us to restrict and test climate forecasting models. Therefore, we will know earlier if the predicted temperatures that the models are giving us are consistent or not with the observations.

The TRUTHS mission does not yet have an exact launch date, but officials from ESA member states plan to deploy it sometime in 2026.

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