Tag: glacier

Ice Cave Vanished! Mendenhall Glacier

Ice Cave in Mendenhall Glacier vanished, a casualty of climate change
CLICK IMAGE Video as I explore a Fabulous Blue Ice Cave. Feel the satin of ice, strangely warm to touch.

Click image for video: This fabulous blue ice cave that I explored in 2017 has vanished. Feel the satin of ice, strangely warm to touch. Look through 1.2 meters (4 ft.) of clear ice. Mendenhall Glacier, Juneau, Alaska.

I mountain biked across frozen Mendenhall Lake in February 2017 to visit this ice cave.

Completely alone in the cave, I had time to sit quietly with the sound of flowing water, surrounded by shimmering blue walls. Eventually, I narrated this short reflection on a place that would disappear forever.

I visited the cave several more times in February, finding crystal boulders of ice that had fallen from the roof.

The cave has completely vanished as the glacier melts and retreats, melted into water that fed Mendenhall Lake and river last summer, an ephemeral creation and ghost of changing climate and rapid glacial retreat.

Over the next couple of Alaska Billy Blog posts, I’ll continue with more photos and thoughts about this cave and the Mendenhall Glacier.

For additional photos and stories, please visit me on Instagram. I post one photo and story each day.

Instagram: @bhfootloose

 

 

 

 

Nugget Falls roars into Mendenhall Lake

Nugget Falls cascades into Mendenhall Lake; Mendenhall Glacier in
CLICK PHOTO TO VIEW VIDEO: Nugget Falls cascades into Mendenhall Lake; Mendenhall Glacier in distance

Nugget Falls roars into Mendenhall Lake, Juneau, Alaska. Follow the creek as it flows into Mendenhall Lake (frozen), and you can see the foot of the Mendenhall Glacier in the distance.

The snowy peak prodding the blue sky is Mount Stroller White (1,570 m; 5,150 ft). The forested ridgeline in front of Stroller White that ascends to the left is one of the shoulders of Mt. McGinnis (1,289 m; 4,228 ft).

Nugget Creek arises from Nugget Glacier, flowing down a valley that separates Mount Bullard (1,288 meters; 4,225 ft.) from Heintzleman Ridge. My IG Post from 11/27/2017 shows me on cross country skis with Mount Bullard in the background.

A dam and a 198-meter (650-foot) long tunnel were constructed by the Treadwell Company during the heyday of early hardrock gold mining in Juneau. This hydroelectric facility provided electricity from 1912 to 1943, just one of a number of hydroelectric plants that put Juneau at the forefront of early industrial use of electricity, including electric locomotives.

Nugget Falls is one of the most popular tourist attractions in Juneau along with the Mendenhall Glacier. It’s also one of our favorite 30-minute hikes of exceptional beauty and the power of the waterfall.

Kate Troll shares peace & beauty in wilderness of icebergs

Kate Troll rafting Alsek Lake
Kate Troll shares a moment of peace and beauty among the icebergs of Alsek Lake, Southeast Alaska, near Dry Bay on the Lost Coast

Kate Troll (@katetroll) shares a moment of peace and beauty among the icebergs of Alsek Lake, Southeast Alaska, near Dry Bay on the Lost Coast. Kate & I have been living in & exploring Alaska for 40 years. She combines her adventures here and around the world with her long career as a leader in environmental conservation, and her thoughts about hope in the face of climate change, in her book: “The Great Unconformity: Reflections on Hope in an Imperiled World”.

Just one more magnificent highlight on our float trip down the Tatshenshini River to the Alsek River, which runs through Alsek Lake before emptying into the Gulf of Alaska at Dry Bay. 11-day trip with 10 friends through 3 Canadian and USA national parks that combine into largest designated wilderness in world.

The powerful Alsek River flows under the mile-wide ice berg jam from huge glaciers that calve into the lake, and exits around a large island. The ice can completely block the exit, forcing rafters to get picked up here by bush plane. We hiked in to scout a route, and were able to find an open channel between the shoreline the ice jam, the eerie growl of river going under the ice off to our port side, forcing us to row far out into Alsek lake.

Video-Juneau Icefield viewed from helicopter

CLICK PHOTO for video of Juneau Icefield from Helicopter

Video-Juneau Icefield viewed from Astar 119 helicopter just above Taku Inlet, probably over Norris Glacier. The helicopter pilot is our son, Rion Hanson. Although named the Juneau Icefield, it extends 140 km (87 mi) north to south and 75 km (47 mi) east to west, making it the 4th largest icefield in the Northern Hemisphere.

Era Helicopters has a dog sledding camp on the icefield for summertime tours, with access only by helicopter. I’ve flown over different parts of the icefield during the last 40 years, and it remains one of the most astoundingly beautiful places I’ve seen. At its thickest, the ice is 1,400-meters (4,590 ft.) deep!
While valley glaciers like the Mendenhall, Eagle, Herbert, and Taku Glaciers near Juneau flow down close to sea level, the vast ice field is completely invisible from saltwater and cities.

Fog rises as the Mendenhall River flows out of Mendenhall Lake

Mendenhall River at mouth of Mendenhall Lake
Mendenhall River at mouth of Mendenhall Lake

Fog rises as the Mendenhall River flows out of Mendenhall Lake. The water is clearing up now that winter is setting in. Kate Troll, Nellie the Sheltie, and I skied around the shoreline of Mendenhall Lake to the outlet where the Mendenhall River originates.

Glacial rivers change radically from summer to winter. With summer warming, the melting glacier greatly increases the river flow, making the Mendenhall River a whitewater rafting destination for tourists. Silt from the glacier turns the water an opaque gray, and rafters can hear the hiss of silt against the rafts. In winter, flow is much less, and water more clear.

Mendenhall Glacier also causes jökulhlaups (an Icelandic term), glacial outburst floods. Meltwater builds up under the glacier, trapped by ice dams. When the ice dam melts away or breaks, the water bursts out, causing the Mendenhall River rise to flood stage very quickly. These jökulhlaups have become more predictable with sensors placed under the glacier to monitor water build-up.

Skiing Mendenhall Lake to Mendenhall River

Bill Hanson with Mendenhall River & Mt. Bullard in background
Mendenhall River & Mount Bullard (1,288 meters; 4,225 ft.) behind Bill Hanson. I’m standing about 6 meters (20 feet) above sea level.

Kate Troll, Nellie the Sheltie, and I skied around the shoreline of Mendenhall Lake a few days ago to the outlet where the Mendenhall River originates.

A little over a century ago, we would have been under the ice of the Mendenhall Glacier in this spot. Today, the glacier is 3.5 Km (2.2 miles) away and receding rapidly. Sometime in the next few years, it will no longer touch Mendenhall Lake, and icebergs will disappear.

Snow was beautiful, but has now given way to light rain. I’m thankful that I skied when the skiing was wonderful. Like many other places in Juneau, we treasure the beauty of our landscape—a new, magical view with nearly every kick of the skis.

We tried skiing on the lake and ran into slushy overflow beneath pristine fluffy snow. First job – scraping ice caked on our skis. Second—adjusting plan to ski the shoreline. Kate and I both have waxing skis. Mine are about 45 years old (!)—Fisher Europa 77’s—sort of like driving a steam-powered car—heavy and long, but still have camber and metal edges, so I like them fine.