The USA’s Rocky Mountains Have Not Been Cooperating With The Global Warming Narrative

There has been no net warming in the Rocky Mountains in the last 500 years.

The southern Rocky Mountains were as warm or warmer than recent decades during the 1600s and 1700s and they have been cooling since the 1950s (Berkelhammer and Stott, 2012, Heeter et al., 2020).

the usas rocky mountains have not been cooperating with the global warming narrative

Image Source: Berkelhammer and Stott, 2012

the usas rocky mountains have not been cooperating with the global warming narrative 1

Image Source: Heeter et al., 2020

The northern Rocky Mountains were also as-warm or warmer during the 1600s and 1700s with no unusual recent warming (Kipfmueller, 2008).

the usas rocky mountains have not been cooperating with the global warming narrative 2

Image Source: Kipfmueller, 2008

The glaciers in Glacier National Park (northern Rockies) experienced substantially higher melt rates in the 1920s to 1940s, only to return to Little Ice Age melt rates in the following decades (Pederson et al., 2004).

the usas rocky mountains have not been cooperating with the global warming narrative 3

Image Source: Pederson et al., 2004

The press release for a new study by the very same authors of last year’s reconstruction of southern Rocky temperatures screams that the northern Rockies are now “hotter than ever.” However, the temperature record from the study itself shows ~2°C cooling from 1940-1970 and a more sustained warm temperatures during Medieval times and especially the late 1500s to early 1600s.

the usas rocky mountains have not been cooperating with the global warming narrative 4
Image Source: Heeter et al., 2021

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