Here, in the first spatial analysis of historical and projected temperature and precipitation across all 417 US national parks, we show that climate change exposes the national park area more than the US as a whole. This occurs because extensive parts of the national park area are in the Arctic, at high elevations, or in the arid southwestern US
From 2000 to 2100, under the highest emissions scenario ... park temperatures would increase 3 °C–9 °C
Direct link to study (not paywalled): http://iopscience.iop.org/article/10.1088/1748-9326/aade09/meta