Population: 176

We had read that Bear Creek was also home to some American dippers, and sure enough we saw a family of them nearby. This parent was feeding a chick that was sitting on a nearby log:



Next stop was Portage Glacier, where we had planned to take the one mile hike to the glacier view point. By that time, however, the wind had picked up and it was raining sideways, so we aborted that plan and instead just stopped by the visitor center. Here is a photo I took from one of the picture windows at the visitor center, overlooking an iceberg in Portage Lake. I thought it captured the essence of the afternoon quite well:


I wrote a few brief comments yesterday about how the glaciers were receding before human-caused global climate change really started having major effects, since the Little Ice Age ended about 200 years ago. That said, human activities are a major contributing factor to the increase of global average temperatures, particularly in the last 50-100 years. Few places may be feeling the impacts of climate change quite as much as Alaska is already. Today I was pleased to find some more literature on the effects climate change in Alaska at the Chugach National Forest visitor center near Portage Glacier. Here's a little bit of what I learned.
One of the first things we think of when we think of the climate becoming warmer is less ice in the polar regions. Few climate issues have received as much publicity as the reduction of pack ice and its impact on polar bears, and less pack ice can also lead to more erosion of shorelines. Glaciers are of course affected as well, while the glaciers such as Exit Glacier in Kenai Fjords National Park have been receding for the last 200 years, the rate of recession has increased in recent years. The loss of glacier ice can contribute to rising sea levels as well as changes in salinity and currents that may affect fish.
But what else changes, besides a reduction in ice? Permafrost in the interior can melt, destablizing roads and structures and altering habitats. Different species of plants and animals may start encroaching further to the north or to higher elevations based on the changing climate, and may also no longer be able to tolerate conditions in the south or at lower elevations that were previously prime habitat to them. The lack of snow can increase or decrease the die-off of certain species, throwing the ecosystem off-balance. The most noticeable example are the huge stands of dead spruce trees we have seen all throughout our trip, which are a result of the spruce beetle. Infestations have been worse because without harsh winters, the beetles aren't experiencing the die-offs that normally allow the spruce to recover. Also, with less precipitation, the fire risks increase.
Of course, these changes are by no means limited to Alaska. One brochure I picked up today shows some striking pictures of glaciers "then" and "now", over a span of about 60 years, along with the sobering fact that the glaciers in Montana's Glacier National Park may be completely gone by 2030. Alaska is a place where the changes in our climate are more apparent, and also where a lot of research is happening, which is great to see.
The question, of course, is: what can be done? The National Park Service brochure explains that "Many times in our nation's history, citizens have confronted difficult circumstances and found creative solutions....These stories now form a call to action in the stewardship of our resources for future generations. It is important that all of us participate in answering that call." So, with that, I encourage you all to keep taking actions towards a sustainable future. Recycle. Reduce your energy consumption. Use public transportation, or walk, or bike. Be a conscientious consumer. And, above all, continue to enjoy the beauty of the natural world, and foster that sense of awe in others, because surely that is the real key to ensuring the continued health of our planet and all the creatures that call it home.










































