Roundup: Antarctica and Greenland in peril, black carbon

Ninety percent of the western Antarctic Peninsula’s glaciers are retreating

The Antarctic Peninsula (Source: Wild Frontiers)
The Antarctic Peninsula (Source: Wild Frontiers)

From Carbon Brief: “These rivers of ice ooze their way down through the Peninsula’s rocky mountain range and into the ocean, powered by gravity and their own weight. But of the 674 glaciers on the Peninsula’s western side, almost 90% are retreating. This happens when their ice melts faster than new snowfall can replenish it.

“The Antarctic Peninsula is one of the fastest warming regions on Earth. Temperatures have risen by more than 3C over the past 50 years. The warming atmosphere has caused some remarkable changes to the eastern side of the Peninsula. The Larsen ice shelf, a floating sheet of ice formed from glaciers spilling out onto the cold ocean, has lost two of its four sections in recent decades.”

Learn more about the Antarctic Peninsula’s glaciers and effects on the ocean here.

 

Greenland lost a mind-blowing 1 trillion tons of ice in under four years

Greenland's cumulative melt days in 2016
Greenland’s cumulative melt days in 2016

From Washington Post: “It’s the latest story in a long series of increasingly worrisome studies on ice loss in Greenland. Research already suggests that the ice sheet has lost at least 9 trillion tons of ice in the past century and that the rate of loss has increased over time. Climate scientists are keeping a close eye on the region because of its potentially huge contributions to future sea-level rise (around 20 feet if the whole thing were to melt) — not to mention the damage it’s already done. Ice loss from Greenland may have contributed as much as a full inch of sea-level rise in the last 100 years and up to 10 percent of all the sea-level rise that’s been documented since the 1990s.

“Overall, the ice loss was particularly prevalent in the southwest, but the scientists noted that there were also losses observed in the cooler, northern parts of the ice sheet. Notably, the researchers also found that a solid 12 percent of all the ice loss came from just a handful of glaciers composing less than 1 percent of the ice sheet’s total area.”

Read more here.

 

Understanding black carbon impact on glaciers

The ice surrounding this climate station is covered by dust, black carbon, ice algae
The ice surrounding this climate station is covered by dust, black carbon, ice algae (Source: PBS)

From International Centre for Integrated Mountain Development (ICIMOD): “In April 2016 and team of glaciologists and experts from the International Centre for Integrated Mountain Development’s (ICIMOD) and partner organisations — Department of Hydrology and Meteorology, Utrecht University, Kathmandu University (KU),Tribhuvan University (TU), Norwegian Water Resources and Energy Directorate (NVI) went to Langtang for a field visit.

“‘The elevation of Yala Glacier is higher compared to those in Pakistan. Gulkin Glacier, in Pakistan, starts from 2700 to 4000 m, so there was almost no snow on the glacier in this season. Only towards the top of the glacier at around 4000m AMSL snow was present. The rest of the glacier was mostly debris’, Chaman said. Sachin Glacier, at 3200- 4000m AMSL, is different to Yala and Gulkin, and samples collected from this glacier represent semi-aged or aged-snow. ‘There was fresh snow on the night of collection so the samples were very fresh’  Chaman said of Langtang. He expects to see large variability in black carbon concentrations in the samples, contributing to effect of elevation, geographical location, glacier type, age and fresh samples.”

Learn more here.

 

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