Quantcast
Popular

Massive Iceberg Finally Breaks Off: Antarctic Landscape 'Changed Forever'

One of the biggest icebergs ever recorded has "finally" broken away from the Larsen C ice shelf in Antarctica, researchers studying the event announced.

The iceberg, which will likely be dubbed A68, weighs more than a trillion tonnes, has a volume twice that of Lake Erie, and is about 5,800 square kilometers in size—roughly the size of Delaware.


According to Project MIDAS, the UK-based Antarctic researchers observing the ice shelf, the calving occurred sometime between Monday and Wednesday.

The landscape of the Antarctic Peninsula has been "changed forever," the researchers said. The calving leaves the Larsen C Ice Shelf reduced in area by more than 12 percent, its smallest size ever recorded.

The widening crack had been developing over the past year. Project MIDAS said last week that the massive iceberg was hanging onto the main shelf by just a 3-mile thread. "Multiple rift tips" had also formed, meaning a number of smaller icebergs could also splinter off.

"We have been anticipating this event for months, and have been surprised how long it took for the rift to break through the final few kilometers of ice. We will continue to monitor both the impact of this calving event on the Larsen C Ice Shelf, and the fate of this huge iceberg," Professor Adrian Luckman of Swansea University and lead investigator of the project said.

"The iceberg is one of the largest recorded and its future progress is difficult to predict. It may remain in one piece but is more likely to break into fragments. Some of the ice may remain in the area for decades, while parts of the iceberg may drift north into warmer waters," Luckman added.

The new configuration of Larsen C could potentially make it less stable. There's a chance it could follow the example of its neighbor, Larsen B, which rapidly broke apart in 2002 after a similar rift-induced calving event in 1995, the researchers said.

"In the ensuing months and years, the ice shelf could either gradually regrow, or may suffer further calving events which may eventually lead to collapse—opinions in the scientific community are divided. Our models say it will be less stable, but any future collapse remains years or decades away," Luckman said.

The iceberg will have no immediate impact on sea level since it was already floating before it calved. However, as these ice shelves disintegrate, the land-locked glaciers they hold back may begin sliding into the sea.

"Although this is a natural event, and we're not aware of any link to human-induced climate change, this puts the ice shelf in a very vulnerable position," explained Dr. Martin O'Leary, a Swansea University glaciologist and member of the MIDAS project team. "This is the furthest back that the ice front has been in recorded history. We're going to be watching very carefully for signs that the rest of the shelf is becoming unstable."

Show Comments ()
Sponsored
African elephant. USFWS

Lawsuit Challenges Trump Administration Over New Elephant and Lion Trophy Policies, Still in Effect Despite Trump's Tweets

The Center for Biological Diversity and Natural Resources Defense Council sued the Trump administration Monday for allowing U.S. hunters to import elephant and lion trophies from Zimbabwe. The lawsuit aims to protect animals and resolve confusion created by the administration's contradictory announcements in recent days.

The suit comes days after the U.S. Fish and Wildlife Service abruptly reversed an Obama-era ban on elephant trophy imports based on catastrophic elephant population declines. Fish and Wildlife also recently greenlighted lion trophy imports from Zimbabwe, despite the controversial killing of Cecil the Lion in Zimbabwe in 2015.

Keep reading... Show less
Below the Mackinac bridge runs Enbridge Line 5, transporting 23 Million gallons of oil and liquid gas every day. Conor Mihell

Four Questions About the New Line 5 Pipeline Report

By Beth Wallace

In June, the state of Michigan released a draft report on alternatives to Enbridge's Line 5 pipeline, which pumps up to 23 million gallons of oil and natural gas liquids (NGLs) per day along the bottom of the Straits of Mackinac. The draft report, written by Dynamic Risk, was met with heavy criticism from all sides, and the National Wildlife Federation joined with many others to suggest numerous and substantive changes. On Nov. 20, the final alternatives report was released to the public. As per an agreement with the state to obtain funding for the report, Enbridge has had five days to review this report before it is released publicly.

Keep reading... Show less
USDA

Thanksgiving Dinner Is Cheapest in Years, But Are Family Farms Paying the Price?

By Sarah Reinhardt

Last week, the Farm Bureau released the results of its annual price survey on the cost of a typical Thanksgiving dinner. The grand total for a "feast" for 10 people, according to this year's shoppers? About 50 dollars ($49.87, if you want to be exact). That includes a 16-pound turkey at $1.40 per pound, and a good number of your favorite sides: stuffing, sweet potatoes, rolls with butter, peas, cranberries, a veggie tray, pumpkin pie with whipped cream, and coffee and milk.

After adjusting for inflation, the Farm Bureau concluded that the cost of Thanksgiving dinner was at its lowest level since 2013. Let's talk about what that means for farmers, and for all of us.

Keep reading... Show less

Would More People Ride the Bus if It Looked and Felt Like a Train?

By Jeff Turrentine

It moves through city thoroughfares, towering above automobile traffic. It makes frequent stops to pick up and drop off passengers. It has places to sit, places to stand, and—yes—rubber-tired wheels that go 'round and 'round, all through the town.

But don't call it a bus. It's a "trackless electric train."

Keep reading... Show less
Sponsored

Electric Car Sales Surge 63% Globally

Electric vehicles (EVs) continue to gain momentum on the world market.

Global sales of electric and hybrid cars are 63 percent higher than the same quarter last year, and up 23 percent from the second quarter, according to a Bloomberg New Energy Finance (BNEF) report.

Keep reading... Show less
Harvesting sugarcane in Brazil. Jonathan Wilkins / CC BY-SA

Jet Fuel From Sugarcane? It’s No Flight of Fancy

By Deepak Kumar, Stephen P. Long and Vijay Singh

The aviation industry produces two percent of global human-induced carbon dioxide emissions. This share may seem relatively small—for perspective, electricity generation and home heating account for more than 40 percent—but aviation is one of the world's fastest-growing greenhouse gas sources. Demand for air travel is projected to double in the next 20 years.

Airlines are under pressure to reduce their carbon emissions, and are highly vulnerable to global oil price fluctuations. These challenges have spurred strong interest in biomass-derived jet fuels. Bio-jet fuel can be produced from various plant materials, including oil crops, sugar crops, starchy plants and lignocellulosic biomass, through various chemical and biological routes. However, the technologies to convert oil to jet fuel are at a more advanced stage of development and yield higher energy efficiency than other sources.

Keep reading... Show less
Sponsored
Renewable Energy
"Eólica" or wind power plant in Guanacaste, Costa Rica. ICE Group / Twitter

Costa Rica Runs Entirely on Renewable Energy for 300 Days

Costa Rica has charted another clean energy accolade. So far this year, the Central American country has run on 300 days of 100 percent power generation from renewable energy sources, according to the Costa Rican Institute of Electricity (ICE), which cited figures from the National Center for Energy Control.

With six weeks left of 2017 to go, Costa Rica could easily surpass 300 days.

Keep reading... Show less
Popular
iStock

Starbucks Falls Short on Environmental Commitments

By Davis Harper

Since the early 1970s, Starbucks has held a special place in cupholders. Widespread infatuation with the company's caffeinated beverages has earned the coffee giant a storefront on almost every corner. With outposts in 75 countries and a whopping 13.3 million people enrolled in its loyalty rewards program, Starbucks has scorched nearly all of its closest competitors among major U.S. food brands (most of which aren't even coffee chains) in total market value.

With such reach and power comes tremendous responsibility. Starbucks touts its own corporate responsibility—claiming to be climate-change-aware and cognizant of its environmental cup-print—but how many latte-sippers know that their paper cup actually isn't recyclable and that it'll likely end up in a landfill? Might the knowledge that Starbucks's meat supply is pumped with antibiotics alter the market's appetite for the popular chicken and double-smoked bacon sandwich? Although the company prides itself on environmental awareness and progress toward sustainable products, multiple reports point to the mega-corporation's failure to live up to its own purported standards.

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!