4 ms·

Do they come back with 1.5 degrees of cooling? Just curious.

• bryanlarsen 3y ago
  Do you mean back to pre-industrial levels or 1.5 degrees below pre industrial levels? I don't know about other regions, but the Rocky Mountain glaciers weren't in steady state at pre industrial temperatures, they were slowly retreating. They are remnants of the ice age.
  • margalabargala 3y ago
    The glaciers in the Cascades of the PNW were advancing in the early 1900s (a new one in the crater where most of Mt St Helens used to be is still advancing!) so at pre-industrial temps those would absolutely come back.
    • bryanlarsen 3y ago
      To advance a glacier needs both moisture and cold. The PNW receives a lot more moisture than Alberta.
      • margalabargala 3y ago
        For sure. I was merely commenting on one of the "other regions" you referred to.
• NikkiA 3y ago
  No, you'd need to go back to ice-age temperatures again