posted on May, 15 2014 @ 05:38 PM
a reply to: Phage
Phage, if you misunderstood me to suggest someone stood atop a ridge in 1850 to take a photograph, I'm sorry. It's not what I said.
Glacier national Park has photos over time that sit on record with the USGS showing 1850, 1937, and onward for positions of major glacier
retreat by melt off.
The original photo does show a known position (probably first surveyed without digging for precise sourcing on this thread) for 1850. Subsequent ones
show the change and some, with graduated points of change for the years indicated. Photos do exist for much of that.
It's always appreciated...the effort to fact check and make sure folks have something right. It's helpful to avoid assuming people don't have more
to share or elaborate on though. As I actually have a great deal more on glacial retreat and melting pre 20th century for the starting points observed
in more than just North America.
As far as Antarctica.. Yup.. I'm well aware of the mechanics of the Western ice sheet. Again, my bad if terminology wasn't as clear as needed...and
suggestions of causation are being found. Some, just this past season on the Ice, in fact. It's become something I follow news from
as closely as any US wire feed. Though the thread I linked above and wrote about the whole issue, had indicated it too.
Antarctica is a weird and fascinating place, no doubt.