Quantcast

Satellite Reveals Troubling Retreat of Patagonian Glaciers

Climate

Researchers with the European Space Agency (ESA) have mapped in stunning detail the extensive retreat of South America's Patagonian ice fields, where some glaciers are melting at the highest rates on Earth and contribute to global sea level rise.

In a report this week, ESA revealed that between the years 2011 and 2017, Patagonia's ice fields receded at a rate of more than 21 gigatonnes (Gt)—21 billion metric tons—a year, the equivalent to adding 0.06 millimeters to global sea level.


During that six-year period, the team observed "widespread thinning of ice, particularly in the northern part of the Patagonian ice fields," said Luca Foresta, from the University of Edinburgh, in a statement.

"For example, the Jorge Montt glacier, which flows down to the ocean, retreated 2.5 kilometers and lost about 2.2 Gt of ice a year, and the Upsala glacier, which terminates at a lake, lost 2.68 Gt a year," Foresta said.

"In contrast, however, Pio XI, the largest glacier in South America, advanced and gained mass at a rate of about 0.67 Gt a year."

The scientists gathered this information using a novel technique called "swath processing" of data from ESA's CryoSat satellite, which monitors ice volume.

This new method, detailed in a paper published last month in the journal Remote Sensing of Environment, allows whole swaths, rather than single points, of elevations to be computed, thus yielding more detail on the changing nature of glacial ice.

The study authors noted that Patagonian ice fields have thinned rapidly in recent years. Its ongoing melting has contributed about 15 percent to the total mass loss from glaciers and ice caps in the first decade of this century.

"This is because the weather is relatively warm and these glaciers typically terminate in fjords and lakes, exacerbating surface melting and causing them to flow faster and lose ice as icebergs at their margins," ESA explained in a report.

"There is a clear need to monitor and understand glacial dynamics, not only in Patagonia but globally," ESA said.

EcoWatch Daily Newsletter

belchonock / iStock / Getty Images Plus

By Hrefna Palsdottir, MS

Coconut oil is an incredibly healthy fat.

Read More Show Less
Wesley Martinez Da Costa / EyeEm / Getty Images

By David R. Montgomery

Would it sound too good to be true if I was to say that there was a simple, profitable and underused agricultural method to help feed everybody, cool the planet, and revitalize rural America? I used to think so, until I started visiting farmers who are restoring fertility to their land, stashing a lot of carbon in their soil, and returning healthy profitability to family farms. Now I've come to see how restoring soil health would prove as good for farmers and rural economies as it would for the environment.

Read More Show Less
Sponsored
skaman306 / Moment / Getty Images

By Jillian Kubala, MS, RD

Radish (Raphanus sativus) is a cruciferous vegetable that originated in Asia and Europe (1Trusted Source).

Read More Show Less
Tinnakorn Jorruang / iStock / Getty Images

By Dan Nosowitz

The budding research on cannabidiol, or CBD, attracts a great deal of interest in the agricultural field.

Read More Show Less
Oksana Khodakovskaia / iStock / Getty Images

By Jillian Kubala, MS, RD

The loquat (Eriobotrya japonica) is a tree native to China that's prized for its sweet, citrus-like fruit.

Read More Show Less
Sponsored

The Centers for Disease Control (CDC) released new numbers that show vaping-related lung illnesses are continuing to grow across the country, as the number of fatalities has climbed to 33 and hospitalizations have reached 1,479 cases, according to a CDC update.

Read More Show Less
During the summer, the Arctic tundra is usually a thriving habitat for mammals such as the Arctic fox. Education Images / Universal Images Group via Getty Images

Reports of extreme snowfall in the Arctic might seem encouraging, given that the region is rapidly warming due to human-driven climate change. According to a new study, however, the snow could actually pose a major threat to the normal reproductive cycles of Arctic wildlife.

Read More Show Less
Vegan rice and garbanzo beans meals. Ella Olsson / Pexels

By Alina Petre, MS, RD (CA)

One common concern about vegan diets is whether they provide your body with all the vitamins and minerals it needs.

Many claim that a whole-food, plant-based diet easily meets all the daily nutrient requirements.

Read More Show Less