Comparison of full-pool and historic lows in Iola Basin in Blue Mesa Reservoir
Left image
Low water levels in Iola Basin Oct 2018
Credit: NPS Photo / Lynch
Right image
Full Pool of Iola Basin
Credit: NPS Photo / Lynch
Slide panel back and forth to see the photo comparison. Pictures are of the Lake City bridge taken from the same spot looking west.
What is it?
Climate change refers to long-term changes to temperature and precipitation patterns. Human activities, including burning fossil fuels, release greenhouse gasses into the atmosphere. These greenhouse gasses (GHGs) act like a good sleeping bag, insulating and holding heat inside our atmosphere. As GHGs in our atmosphere increase the earth becomes layered in more and more sleeping bags, causing our global temperature to rise. Scientists agree that human activities are causing global climate change. Read more.
Weather vs. Climate
Climate Change is different than a September blizzard or a few days of extreme heat in June. Climate change is distinct from weather. Climate includes longer term trends and average weather patterns over decades.
Weather is short-term, it’s the reason you check a forecast before a trip to choose what to wear on a given day. A sweater or a tank top? Climate dictates what types of clothes you have in your closet. If you live in a warm, tropical place, your closet will likely have more flip flops than wool socks and parkas. You would have to change your whole wardrobe to adjust to a change. Understanding climate change means taking a long view.
Effects of Climate Change at Curecanti
Human-caused climate change is causing dramatic effects throughout the world. At Curecanti, the most dramatic observable effect of climate change is the low water level at Blue Mesa Reservoir. At Blue Mesa, water levels in 2021 and 2018 dropped to some of the lowest levels since the dam was completed in 1968. The effects of prolonged drought are visible from everywhere in Curecanti.
In addition to drier conditions throughout Colorado and the American Southwest, climate change is affecting terrestrial and aquatic ecosystems. Warmer and drier summers enable invasive plant species to spread which affect native bird populations. Warming air temperatures also affect aquatic and human health, and more.
Climate Change and the NPS Mission
The National Park Service was created in the Organic Act of 1916. The new agency's mission as managers of national parks and monuments was clearly stated."....to conserve the scenery and the natural and historic objects and the wild life therein and to provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations.".
Human-caused climate change is affecting wildllife and resources in park units all across the country. Therefore, it is within the mission of the National Park Service to address climate change.
To address the changes that are occurring or will occur, the National Park Service takes a proactive approach to respond to climate change. Learn more about the NPS response, how the agency is studying climate change, and how you can get involved to be part of the solution.
Climate Change and the National Park Service
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 Across the US, changes in water availability are altering which plants grow where. These changes are evident at a broad scale. But not all areas experience the same climate in the same way, even within the boundaries of a single national park. A new dataset gives park managers a valuable tool for understanding why vegetation has changed and how it might change in the future under different climate-change scenarios.  Birds of the desert southwest, a climate-change hotspot, are among the most vulnerable groups in the US. To help park managers plan for those changes, scientists evaluated the influence of water deficit on landbird communities at 11 national parks in Utah and Colorado. The results will help land managers to focus conservation efforts on places where certain species are most vulnerable to projected climate changes.  Scientists from the Northern Colorado Plateau Network travel thousands of miles each year to collect data on plants, soils, and water across network parks. But it would be impossible to cover every square inch of the Northern Colorado Plateau with boots on the ground. Instead, we simultaneously monitor the parks with boots in space—satellite data that provide information at a much broader scale.  When the climate changes enough, the vegetation communities growing in any given place will also change. Under an expanded bimodal climate zone, some plant communities in western national parks are more likely to change than others. National Park Service ecologists and partners investigated the future conditions that may force some of this change. Having this information can help park managers decide whether to resist, direct, or accept the change.  Across the Intermountain Region, Inventory & Monitoring Division ecologists are helping to track the effects of climate change, provide baseline information for resource management, evaluate new technologies, and inspire the next generation of park stewards. This article highlights accomplishments achieved during fiscal year 2021.  The results of a recent study may help land managers to prioritize grassland conservation and restoration efforts. Park managers can’t do much about climate, but with the right information, they can make choices based on how different grassland communities behave in different soil types. In this study, cool-season grasses showed more resilience to drought than warm-season grasses.  Knowing which key natural resources are found in the national parks, and whether they're stable or changing, helps decisionmakers make sound choices. The Northern Colorado Plateau Network is building that knowledge. After more than ten years of monitoring, we've learned a lot about park ecosystems, how they're changing, and what they may look like in the days to come. Find out what we’ve learned and how it’s being used to help managers plan for the future.  Multiple species of blue green algae, also known as cyanobacteria, are native to our area of Colorado and are an essential part of the food web in Blue Mesa. In fact, cyanobacteria showed up about 2 billion years ago on the planet. Even though it has been around for billions of years, more and more lakes around the World are seeing bigger and more frequent blooms - Blue Mesa Reservoir included.  As the northern Colorado Plateau heads into a hotter, drier future, there will be ecological winners and losers. Figuring out how different vegetation communities will fare is tricky. A recent study aimed to identify which vegetation communities might come out ahead, which might lag behind, and what might make the difference.
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