Thursday, April 5, 2007

Hubbard Glacier

As our Alaskan cruise continued, my wife, Sharon, woke me in the early morning. Our ship was sailing into Disenchantment Bay, home of Hubbard Glacier. It was drizzly, foggy, cool, and too early for me to rush awake. Sharon went up on deck and I followed later.

Hubbard Glacier is North America's largest tidewater glacier. A tidewater glacier is one that travels far enough to reach the sea. The origins of Hubbard are back up in the Yukon about 75 miles and it is still advancing. The face of the glacier is 6 miles long and 300-500 feet high. A lot more is under the water. It is HUGE! Our ship, Celebrity's Summit, was dwarfed by this 50 story high chunk of ice. We "parked" about a mile from Hubbard, but because of its size, it looked like you could almost reach out and touch it. When we saw a sea bird fly by our ship toward the glacier and almost disappear as it neared the face, we gained a little perspective!

For our best view we were allowed to go to the front of the ship to the helicopter landing pad. There, facing the glacier, a Tlingit naturalist (who Sharon & I had met and become friends with in Hoonah, our previous stop) told us all about Hubbard. The ice has a blueish tinge as did many of the glaciers we had seen earlier. I think this is caused by the air in the ice being pressed out by the pressures of the glacier. The color seems more evident under cloudy skies than sunny. A lot of the glacier's surface is heavily crevassed and fissured. Again, the size of these jagged cracks and convolutions was hard to comprehend until we saw them dwarfing full size spruce trees near the glacier edges. All glaciers also have dirt/gravel they have up heaved incorporated throughout their ice. Some appear "dirtier" than others like the smaller glacier to the side of Hubbard.

Viewing Hubbard Glacier was almost like a religious experience for me. Here we are, in the middle of nowhere, all by ourselves (well, 2500 other passengers too), in a slight drizzle, with fog shrouding the tops of the mountains, in front of a massive, thousands of years old example of nature, and it is perfectly silent. The silence would occasionally be disrupted by a reverberating "crack" or a distant rumble like thunder. Never quite heard sounds like that before. These sounds were Hubbard expanding and contracting. Like the old man he is, he creaks like my old knees. We kept a sharp eye because some of these cracks and moans meant calving (ice falling into the sea from the face of a glacier). Because of the size of Hubbard, though, by the time the sound got to the ship, the calving had already occurred. Did I mention that Hubbard is big? Live the World!

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