- In the news: Sword fern die-off
- Seward Park Fern Die-off Update
- ENVIR 280 BioBlitz at SkyRoot Farm!
- The Puget Sound Region loses two giants in natural history: Art Kruckeberg and Bob Paine
- Seward Park’s Sword Fern Die-off: the problem is getting worse
- In the news: Lynda Mapes of the Seattle Times, covers ENVIR 495C
- 9 days in the Olympic Mountains with ENVIR 495C 2016, “Landscape Change in the Pacific Northwest”
- Natural History Education in the News
- ENVIR 280: Documenting 2014-2015 retreat of the Nisqually Glacier
- ENVIR 495C: Ice worms, a legacy of the ice age
Category Archives: climate change
I often tell my students that naturalists are society’s “canaries in the coal mine” when it comes to noticing changes in the natural world. The difference in the extent of glacial ice at the snout of the Nisqually Glacier from just one year to the next astounded us as we held last year’s photo in front of us and compared it to this year’s view.
With my course, we always compare the current extent of the Nisqually Glacier to historical photos and evidence for past glacial activity which we can find on the landscape, but to have created our own historical photo with the class in 2014, and to go back and document change in 2015, was a particularly unique opportunity. No doubt, the warm winter and record low snowpacks of 2014/2015 were a huge contributor to this striking change. Based on recent historical trends, the Nisqually Glacier will likely continue to retreat this year, but it will be exciting to go back in October 2016 to see if the retreat is as drastic as it was in the past year.
We are lucky to live in a time and place where we can see active glaciers. Seeing “living” glaciers and the landforms they create, helps us understand the history and formation of landscapes in the Puget Sound Region, and gives us insight into the effects of climate changes past and present. If the Nisqually Glacier continues to retreat at rates of 50m to 100m a year, however, it is not hard to imagine a time in the not-too-distant future when courses like ours will no longer be able to study active glaciers in this region. The Nisqually Glacier is one of the longest in the Puget Sound Region, and is about 6km long currently, if you assume its start to be near the summit of Mt. Rainier. Presumably the lower elevation portions of this glacier, maybe the lower 3-4 km of it, will be gone in the next 50 years. If I ever have grandchildren, they will not get to experience the Nisqually Glacier or other valley glaciers like it in the Pacific Northwest. Indeed, if my own children go to college and take ENVIR 280, and hike to the same viewpoint, the view they see below them will certainly NOT include glacial ice. Is this a problem for me or for society? Certainly I stand in a privileged position to be able to fret about what my view will be like, or whether my hikes on Mt. Rainier will be on ice or rock, or whether species like the ice worm (see previous blog post) will go extinct. But the loss of glaciers will have implications for society at large. Melting glacial ice keeps our rivers cold and deep, even after winter snows melt. Diminished glacier ice means diminished summer and early-fall stream flows, which will mean water conservation issues for humans, and severe consequences for aquatic life, particularly salmonid fish, which need consistent strong, cold flows all summer long. If the Nisqually River, and other rivers like it are reduced to a warm trickle by summer, this will have profound consequences for river ecosystems across the northwest. I tend to be fairly objective in my feelings when it comes to environmental change; afterall, there is much evidence on the landscape for dramatic climate swings throughout recent geologic time, and indeed our Pacific Northwest glaciers began retreating before the onset of anthropogenically induced warming. Some species always end up as “winners” and some as “losers”. But when I think that the current acceleration of climate change and drastic warming is caused largely by the actions of humans, I have trouble not viewing the loss of our Pacific Northwest Glaciers as a tragedy. I hope that you can get out and enjoy them now, and be thankful for them, while you can.
The warmest year on record (2015) since 1880 when such records were first recorded is not the year you would expect to “discover” a glacier and an unusual link to the last ice age. But this is just what happened this year with my class, ENVIR 495C: Landscape Change in the Pacific Northwest. Here is the story.
I’ve been hiking the off-trail traverse from Cedar Lake to Graywolf Pass for at least 10 years now. I usually hike it in early to late July, a time of year when the remnants of the previous winter’s snows still blanket most of the route. This summer, however, was perhaps the most anomalous summer in recorded history in the Olympic Mountains. With less than 14% of the normal winter snow pack, the only snow remaining in the mountains, and indeed on the route from Cedar Lake to Graywolf Pass, was snow that has accumulated (and never melted) in shaded, sheltered pockets in years of much greater than average snow pack. I have always assumed that many of these snow pockets simply melt away during lean snow years, and build up again during strings of above average snow years. Some of these snow pockets, however, take on characteristics of glaciers–that is, they form ice in their interiors as snow compacts and crystals deform, and they start to develop crevasses as they slide downhill under their own weight. In these cases, I’ve always wondered if these were small glaciers that built up during a cooling period 250 years ago, or if they are remnants of the extensive glaciers that covered these mountains 16-17,000 years ago during the last ice age.