Exactly. The boy crying wolf, and now you're rationalizing bad "forecasts". And here is the problem.chows - wording of the signage you referenced above was apparently based on the best scientific knowledge and resulting forecasts available at the time of their creation.
I assume you want public money to fight "global warming". Yes? No? Don't care. This is not how you get it. This is the worst possible sales pitch ever. Prediction or Forecast, time after time wrong, highly visible predictions.
Why would the NPS ever put that sign up? You think its for education? "When" was it put up? Who goes to Glacier? Have you been there? I hope so, its fantastic. If you only had one NP to visit, this is the one. Every American should go there once in their life. Who goes there? Hard core hikers for sure. Stay at Sperry or Granite Park Chalet, etc. Here's the approach to Granite Park. This is from horseback.
This is where they used to feed the Grizzlies and it ended up in Tragedy
How one tragic evening revolutionized bear management in our national parks
But the vast majority? They are families. Families hauling their kids in Winnebagos and SUVs and seeing the US NPs. Do you think they know anything, generally, about any of it. You haven't lived until you've seen the ugly American Tourist. Its not a cliche. So one story. This is Grinnell Lake. That bit of snow you see on the top of the waterfall is part of a glacier.
You can read about Grinnell Lake here and see the exact same picture from the article someone else took
Grinnell Lake: trail description, photos, GPS map & directions for this hike past turquoise lakes in the Many Glacier area of Glacier National Park, Montana
We went around the two lakes. Its long but not uphill, ust annoying gnats. At the end of the dock families unloaded from the boats. Then read that description and its across a small suspension bridge then some plans to the lake. Its about 1:00. Hot, sweating. We sit down to eat. What do you think happened?
Kids are screaming at parents. Parents actually came up to us and asked where the vending machines were because their kids were hungry, hot, and thirsty. You see any electric lines out here? Irritated families hauled their kids back. But it gets much worse. Kids and Adults would run up to Mountain Goats with "kids". You think that ended well? And I've seen them do it to Bison on the road in YW. But the best, the very best was at Old Faithful, when a well dressed lady actually asked the park ranger to turn on the geyser cause she was in a hurry. Anecdotal as these stories are, they happen all the time. I could not believe the stories the rangers told us. I'm sure they see much worse. I could tell you about the last pictures a ranger found on a "photographer's camera before ... you figure it out.
So the point is, the public reads the sign saying no glacier by 2020. A decade later .... oops. We were wrong.
Why would anyone ever believe them again? Ever? They are on vacation. They can't figure out not to put their kid on to off a resting Bison (oh yeah, that happens). And you think they are going to read anything beyond "2020"?
Oh, heres a good one. 1929. Glaciers in Glacier are melting and will be gone in 25 years.
Yeah, really really bad salesmen. You want money to "combat" climate change. Lose your salesmen and do decent PR. Today, people's eyes glaze over when they hear all the whining and then ratioanization. No one cares one bit that its a prediction, forecast, computer model, or crystal ball. Its WRONG. Fool me once, shame one. Fool me twice .... shame on me. No money for you.