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Antarctica / Re: PIG has calved
« on: January 26, 2019, 05:56:57 PM »
Pine Island Glacier: 18 months of flow and calving

Antarctica / Re: What's new in Antarctica ?
« on: December 31, 2018, 08:12:31 PM »
Science Team Drills Into Mercer Subglacial Lake

After four days of troubleshooting components that sustained wear and tear from sitting through two winters on ice, the Subglacial Antarctic Lakes Scientific Access (SALSA) Drill Team began drilling the main borehole on the evening of December 23rd and reached the lake faster than expected at 10:30pm on December 26th with a borehole depth of 1084 meters. The drill team then reamed (smoothed and widened) the borehole so that instruments can be sent down.

The only other subglacial lake humans have drilled into—nearby Lake Whillans, sampled in 2013—demonstrated that these extreme environments can play host to diverse microbial life. Naturally, scientists are stoked to see what they’ll find lurking in Lake Mercer’s icy waters.

Now that the lake is open, the real fun has begun. The SALSA team is deploying a suite of instruments to study the lake, including a CTD (Conductivity, Temperature, Depth) probe that will assess temperature and provide details on the structure of the water column, and a remotely operated vehicle to take similar measurements away from the borehole and capture 4k video. Researchers will collect samples of water and microbial DNA, as well as ice from the top of the lake and sediment from the bottom.

Antarctica / Re: Sea Ice Extent around Antarctica
« on: December 25, 2018, 10:51:58 AM »
JAXA ANTARCTIC Sea Ice Extent - 6,775,143 km2(December 24, 2018)

continues to drop like a rock.

Merry Xmas

Arctic sea ice / Re: Arctic Image of the Day
« on: September 15, 2018, 03:29:23 PM »
Icesat-2 launched this morning, a video of the launch can be seen on NASA TV.

Arctic sea ice / Re: The 2018 melting season
« on: June 23, 2018, 05:47:35 PM »
Changing metrics and baselines is generally undesirable because it makes intercomparisons difficult or impossible. Sometimes, it's necessary to do it to make progress, but it should only be done after other approaches fail and the new metric is a substantial improvement worth the cost of change.

What we really need is more buoys and measurements of what's happening in the Arctic, from the upper atmosphere to the deep ocean. Without more and better data it's very hard to make progress.

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