User:Anomalocrisis/Canyonlands National Park

Climate
According to the Köppen climate classification system, Canyonlands National Park has a cold semi-arid climate ("BSk"). The plant hardiness zones at the Island in the Sky and Needles District Visitor Centers are 7a with an average annual extreme minimum air temperature of 4.0 °F (-15.6 °C) and 2.9 °F (-16.2 °C), respectively.

The National Weather Service has maintained two cooperative weather stations in the park since June 1965. Official data documents the desert climate with less than 10 inches (250 millimetres) of annual rainfall, as well as hot, mostly dry summers and cold, occasionally wet winters. Snowfall is generally light during the winter.

The station in The Neck region reports an average January temperature of 29.6 °F and an average July temperature of 79.3 °F. There are an average of 45.7 days with highs of 90 °F (32 °C) or higher and an average of 117.3 days with lows of 32 °F (0 °C) or lower. The highest recorded temperature was 105 °F (41 °C) on July 15, 2005, and the lowest recorded temperature was −13 °F (−25 °C) on February 6, 1989. Average annual precipitation is 9.33 inches (237 mm). There are an average of 59 days with measurable precipitation. The wettest year was 1984, with 13.66 in (347 mm), and the driest year was 1989, with 4.63 in (118 mm). The most precipitation in one month was 5.19 in (132 mm) in October 2006. The most precipitation in 24 hours was 1.76 in (45 mm) on April 9, 1978. Average annual snowfall is 22.8 in (58 cm). The most snowfall in one year was 47.4 in (120 cm) in 1975, and the most snowfall in one month was 27.0 in (69 cm) in January 1978.

The station in The Needles region reports an average January temperature of 29.7 °F and an average July temperature of 79.1 °F. There are an average of 75.4 days with highs of 90 °F (32 °C) or higher and an average of 143.6 days with lows of 32 °F (0 °C) or lower. The highest recorded temperature was 107 °F (42 °C) on July 13, 1971, and the lowest recorded temperature was −16 °F (−27 °C) on January 16, 1971. Average annual precipitation is 8.49 in (216 mm). There are an average of 56 days with measurable precipitation. The wettest year was 1969, with 11.19 in (284 mm), and the driest year was 1989, with 4.25 in (108 mm). The most precipitation in one month was 4.43 in (113 mm) in October 1972. The most precipitation in 24 hours was 1.56 in (40 mm) on September 17, 1999. Average annual snowfall is 14.4 in (37 cm). The most snowfall in one year was 39.3 in (100 cm) in 1975, and the most snowfall in one month was 24.0 in (61 cm) in March 1985.

Climate Change
National parks in the Western US are more effected by climate change than the country as a whole, and the National Park Service has begun research into how exactly this will effect the ecosystem of Canyonlands National Park and the surrounding areas and ways to protect the park for the future. The mean annual temperature of Canyonlands National Park increased by 2.6 °F from 1916 to 2018. It is predicted that if current warming trends continue, the average highs in the park during the summer will be over 100 °F by 2100. In addition to warming, the region has begun to see more severe and frequent droughts which causes native grass cover to decrease and a lower flow of the Colorado River. The flows of the Upper Colorado Basin have decreased by 300,000 acre-feet per year, which has led to a decreased amount of sediment carried by the river and rockier rapids which are more frequently impassable to rafters. The area has also begun to see an earlier spring, which will lead to changes in the timing of leaves and flowers blooming and migrational patterns of wildlife that could lead to food shortages for the wildlife, as well as a longer fire season.

The National Park Service is currently closely monitoring the impacts of climate change in Canyonlands National Park in order to create management strategies that will best help conserve the park's landscapes and ecosystems for the long term. Although the National Park Service's original goal was to preserve landscapes as they were before European colonization, they have now switched to a more adaptive management strategy with the ultimate goal of conserving the biodiversity of the park. The NPS is collaborating with other organizations including the US Geological Survey, local indigenous tribes, and nearby universities in order to create a management plan for the national park. Right now, there is a focus on research into which native plants will be most resistant to climate change so that the park can decide on what to prioritize in conservation efforts. The Canyonlands Natural History Association has been giving money to the US Geological Survey to fund this and other climate related research. They gave $30,000 in 2019 and $61,000 in 2020.