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You are browsing the archive for glaciers Archives - AGU Blogosphere.

21 July 2017

Mountain glaciers recharge vital aquifers

Small mountain glaciers play a big role in recharging vital aquifers and in keeping rivers flowing during the winter, according to a new study. It suggests that the accelerated melting of mountain glaciers in recent decades may explain why arctic and subarctic rivers have increased their water flow during the winter even without a correlative increase in rain or snowfall.

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30 May 2017

Glacier Benito Journal: Observation, Final Words & Acknowledgements

I realised how lucky I am to have observed the glacier in 1972/73 and to have photographed the glacier extensively then so that I was able to show to others one of the demonstratable effects of climate change.

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29 May 2017

Glacier Benito Journal: Departure – Sunday 16th April

The weather was still excellent for our final day for departure. I was tempted to stay one day longer but one should not tempt ‘fate’ even if the weather on Monday was going to be good.

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26 May 2017

Glacier Benito Journal: Winding Up – Saturday 15th April

First excursion in the morning was by Marcos and Olaf to Level II Finger Lower Cairn to measure its position using the Survey GPS. After that they moved to Level I Finger Lower Cairn to repeat the survey activity.

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25 May 2017

Scientists discover new mode of ice loss in Greenland

A new study finds that during Greenland’s hottest summers on record, 2010 and 2012, the ice in Rink Glacier on the island’s west coast didn’t just melt faster than usual, it slid through the glacier’s interior in a gigantic wave, like a warmed freezer pop sliding out of its plastic casing. The wave persisted for four months, with ice from upstream continuing to move down to replace the missing mass for at least four more months.

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Glacier Benito Journal: Crossing the Glacier and the Mavic Takes Off – Friday 14th April

The plan on Friday was conduct Mavic drone flying from the middle of Level II on the glacier. So at 0945, all five of us set off to point ‘403’.

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24 May 2017

Glacier Benito Journal: Finding the Level Markers – Thursday 13th April

Day three started the same as day two. Clear sky, moon providing the illumination before dawn, a sharp frost and no wind! Johnny, Olaf and Mark remained in camp to try to get the X8 drone up and flying.

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23 May 2017

Glacier Benito Journal: Preparing for Drone Flights – Wednesday, 12th April

Each morning’s activity started with Martin getting up at about 0730 to light the cookers. The ground and glacier were frosted. As soon as we left the tent, the condensation inside the tent also turned to ice which fell onto our sleeping bags and mattresses as we entered the tent again to get items required during the day.

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22 May 2017

Glacier Benito Journal: Arriving on Ice – Tuesday 11th April

The first of six magical days on the ice…

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19 May 2017

Glacier Benito Journal: Execution

The team was arriving. Meanwhile snow was falling with it settling down to 500 m above sea level (absl). Had winter started early?

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18 May 2017

Glacier Benito Journal: Planning and Preparation

Over the next six years, the plan emerged following discussions with Olaf Wündrich of ColibriVentura and others. The major requirement was to find a helicopter able to undertake the flights.

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17 May 2017

Glacier Benito Journal: Prologue–1972 to 2011

A dream turns into an obsession. Finally an obsession is resolved. How did it happen? First post from an expedition to Glacier Benito.

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24 January 2017

Arctic melt ponds form when meltwater clogs ice pores

When spring comes to the Arctic, the breakup of the cold winter ice sheets starts at the surface with the formation of melt ponds. These pools of melted snow and ice darken the surface of the ice, increasing the amount of solar energy the ice sheet absorbs and accelerating melt. Now, researchers describe in a new study how these melt ponds form, solving a paradoxical mystery of how a pool of water actually sits atop highly porous ice.

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2 December 2016

To the opposite end of the Earth

Joanna Young does not seem to fear change very much. The spunky redhead first came to Fairbanks from Egypt, where her parents were teaching English and running a school. Raised in Toronto, she knew what cold was. But this was January 2010, a colder-than-average month. The temperature bottomed out at minus 41 F as she arrived.

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22 November 2016

Serenity in blue

During my visit to Iceland, I got to visit glaciers up close and personal for the first time, and one of the places we stopped was at Jökulsárlón, the pro-glacial lagoon at the terminus of the Breiðamerkurjökull glacier.

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22 October 2016

Ísland: Floods

When you bring together volcanoes and ice – as many places in Iceland do – you get floods. Specifically, they’re called jökulhlaups, which literally means “glacier run” but in reality means a glacial outburst flood. Originally the term was used for subglacial outburst floods from Vatnajökull ice cap, which covers the Grímsvötn and Öræfajökull volcanoes, but it’s come to mean any large, abrupt release of water from under a glacier or from a lake at the glacier front.

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17 December 2015

Harbor seals hang out on glacier ice

Harbor seals are the most widespread pinniped species in the world. They range as far south as Baja California in Mexico, and as far north as Artic Canada and Greenland. In the colder areas of that vast distribution, they sometimes make themselves at home on floating chunks of ice below tidewater glaciers.

Glaciers are constantly on the move, flowing slowly downhill under the force of their own weight. When that path leads them into the ocean, they’re called tidewater glaciers. During the summer, harbor seals, up to several thousand at a time, congregate in Alaska’s tidewater glacier fjords.

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15 December 2015

One Million Icequakes

Nestled in the Arctic is a glacier like no other. This glacier quakes once a minute creating seismic events that rattle the earth—more frequently than scientists have ever seen. Understanding why these icequakes are so common may help researchers predict future ice flow, a process that propels climate-driven sea level rise.

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