{"query_echo":{"q":"","filters":{"geography":["Grand Canyon National Park"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'Grand Canyon National Park' for facet 'geography' is not in the controlled vocabulary."}]},"total":{"value":3,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?geography=Grand+Canyon+National+Park","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"climcent-000227","url":"https://climateinsightsdirectory.org/document/climcent-000227","title":"More Extreme Heat in National Parks","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"briefing","language":"en","date_published":"2025-04-09","source_url":"https://www.climatecentral.org/climate-matters/more-extreme-heat-in-national-parks","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The 25 most-visited national parks in the contiguous U.S. are projected to see a nearly five-fold increase in extremely hot days per year by 2050 under a 'warm wet' scenario, and up to a ten-fold increase under a 'hot dry' scenario. These trends, combined with record-breaking visitation, increase the risk of heat-related illnesses for visitors and threaten biodiversity and infrastructure. The National Park Service is implementing adaptation strategies, such as the Climate Change Response Strategy, to mitigate these risks.","ai_generated":true,"unit":"climcent-000227#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"The combined area of the National Park System warmed twice as fast as the overall United States between 1895 and 2010, largely because many parks are in climate-sensitive environments like the Arctic, mountains, and arid regions.","ai_generated":true,"unit":"climcent-000227#insight-1","date_modified":"2026-10-23"},{"text":"By 2050, the 25 most-visited national parks in the contiguous U.S. are projected to experience nearly five times more extremely hot days annually compared to the 1979-2012 period under a 'warm wet' scenario, with an increase of between six and 22 days per year.","ai_generated":true,"unit":"climcent-000227#insight-2","date_modified":"2026-10-23"},{"text":"Under a 'hot dry' scenario, which represents the upper end of projected warming, the 25 most-visited parks could see a ten-fold increase in the annual frequency of extremely hot days by 2050.","ai_generated":true,"unit":"climcent-000227#insight-3","date_modified":"2026-10-23"},{"text":"Yosemite National Park is expected to see the largest increase among the 25 most-visited parks, rising from four extremely hot days per year (1979-2012) to 26 days by 2050. Great Smoky Mountains National Park is projected to increase from three days to 23 days annually.","ai_generated":true,"unit":"climcent-000227#insight-4","date_modified":"2026-10-23"},{"text":"Six of the 25 most-visited parks have extreme heat thresholds exceeding 100°F: Badlands, Arches, Grand Canyon, Joshua Tree, Canyonlands, and Hot Springs. These sites are projected to see a 3-fold to 6-fold increase in such days by 2050.","ai_generated":true,"unit":"climcent-000227#insight-5","date_modified":"2026-10-23"},{"text":"Climate change is increasing heat-related health risks for visitors, particularly during shoulder seasons (spring and fall) when extreme heat is unexpected. This is compounded by the fact that visitation is expected to increase and the visitation season to lengthen by 2050.","ai_generated":true,"unit":"climcent-000227#insight-6","date_modified":"2026-10-23"},{"text":"Human-caused climate change has already led to documented impacts in specific parks, including the loss of bird species in Death Valley, increased tree mortality in Sequoia, melting glaciers in Glacier Bay, and expanded wildfire-burned areas in Yosemite.","ai_generated":true,"unit":"climcent-000227#insight-7","date_modified":"2026-10-23"}],"climate_tags":["extreme heat","climate change adaptation","biodiversity loss","wildfire","glacial melting","public health"],"geography_discussed":["Yosemite National Park","Great Smoky Mountains National Park","Grand Canyon National Park","Death Valley National Park","Sequoia National Park","Glacier Bay National Park and Preserve"],"frame_perspective":[],"analysis_type":["climate projection","risk assessment"]},{"id":"earjust-002399","url":"https://climateinsightsdirectory.org/document/earjust-002399","title":"Forest Service Should Reject Town of Tusayan’s Special Use Application Designed to Facilitate Huge Resort Development Near Grand Canyon National Park Because the Use Is Not in the Public Interest","publisher":{"name":"Earthjustice","organization":"earthjustice"},"document_type":"statement","language":"en","date_published":"2015-03-20","source_url":"https://earthjustice.org/wp-content/uploads/2015-03-2020-20letter20to20rober20bonnie20et20al20from20npca20et20al2020-20tusayan20special20use20application.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The document argues that the Town of Tusayan's application for special use authorizations on Kaibab National Forest land is not in the public interest because it enables a massive resort development by Gruppo Stilo USA. The authors contend that the project threatens the Redwall-Muav regional aquifer, which supports critical springs in Grand Canyon National Park and the water supply of the Havasupai Tribe. They further argue that the development would cause light and noise pollution, overwhelm park infrastructure, and harm wildlife habitats, including elk calving grounds and antelope fawning areas. The letter urges the Forest Service to deny the application before initiating a National Environmental Policy Act (NEPA) process.","ai_generated":true,"unit":"earjust-002399#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"The Town of Tusayan's special use application seeks rights-of-way to enable the construction of a large resort development on the Kotzin and TenX Ranches, which would include approximately five miles of paved roads, new road segments, utility lines, and wastewater and booster pump stations.","ai_generated":true,"unit":"earjust-002399#insight-1","date_modified":"2026-10-23"},{"text":"The planned build-out for the development includes up to 2,176 dwelling units and over 120 acres of commercial development, potentially increasing the population of Tusayan from 550 to between 5,500 and 8,000 people.","ai_generated":true,"unit":"earjust-002399#insight-2","date_modified":"2026-10-23"},{"text":"Groundwater pumping from the Redwall-Muav regional aquifer to support the development threatens the flow of seeps and springs in Grand Canyon National Park, which are critical for wildlife and backcountry hikers.","ai_generated":true,"unit":"earjust-002399#insight-3","date_modified":"2026-10-23"},{"text":"The development poses a threat to the Havasupai Tribe, as they rely on the Redwall-Muav aquifer for their water supply and cultural and religious purposes via Havasu Creek and other springs.","ai_generated":true,"unit":"earjust-002399#insight-4","date_modified":"2026-10-23"}],"climate_tags":["biodiversity loss","climate change","land-use planning","water management"],"geography_discussed":["Havasupai Reservation","Flagstaff","Crested Butte Mountain Resort","Colorado"],"frame_perspective":[],"analysis_type":["policy advocacy","environmental impact assessment"]},{"id":"catf-001130","url":"https://climateinsightsdirectory.org/document/catf-001130","title":"Haze in our National Parks","publisher":{"name":"Clean Air Task Force","organization":"clean-air-task-force"},"document_type":"report","language":"en","date_published":null,"source_url":"https://cdn.catf.us/wp-content/uploads/2019/10/21093509/Out_of_Sight.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The report identifies power plants as the primary source of sulfate particles causing regional haze in U.S. national parks, which significantly reduces visibility and diminishes visitor enjoyment. An analysis by Abt Associates estimates that eliminating power plant haze would provide a total annual benefit of $7.7 billion, comprising $4.3 billion in recreational visibility and $3.4 billion in residential visibility. The document highlights that improved visibility could increase park visitation by 10% to 25%, generating hundreds of millions of dollars in revenue and thousands of jobs for local communities. It recommends the implementation of 'best available retrofit technology' (BART) and a shift toward natural gas and renewable energy to achieve the national goal of remedying visibility impairment.","ai_generated":true,"unit":"catf-001130#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Power plants are the primary cause of regional haze in the U.S., specifically contributing over two-thirds of the sulfate particles that impair visibility.","ai_generated":true,"unit":"catf-001130#insight-1","date_modified":"2026-10-23"},{"text":"Regional haze has severely reduced visibility in national parks compared to natural conditions, with annual average visibility falling to one-third in the west and one-quarter in the east. In the Great Smoky Mountains and Shenandoah National Park, average summertime visibility is reduced to 12 miles from a natural range of 80-90 miles.","ai_generated":true,"unit":"catf-001130#insight-2","date_modified":"2026-10-23"},{"text":"The economic cost of power plant emissions on visibility is estimated at $7.7 billion per year, split between $4.3 billion for parks and wilderness areas and $3.4 billion for residential areas.","ai_generated":true,"unit":"catf-001130#insight-3","date_modified":"2026-10-23"},{"text":"Improving visibility could significantly boost local economies; a 25% increase in visitation could generate annual benefits ranging from $13 million and 390 jobs to $320 million and 4,188 jobs depending on the park.","ai_generated":true,"unit":"catf-001130#insight-4","date_modified":"2026-10-23"},{"text":"Specific high-cost impacts of diminished visitor enjoyment are noted for several parks, with the Great Smoky Mountains National Park having the highest estimated cost at $1.8 billion.","ai_generated":true,"unit":"catf-001130#insight-5","date_modified":"2026-10-23"},{"text":"While the 1990 Clean Air Act Amendments' acid rain program began to improve visibility, EPA estimates these reductions will achieve less than 25% of the progress needed to meet regional haze goals in eastern areas.","ai_generated":true,"unit":"catf-001130#insight-6","date_modified":"2026-10-23"}],"climate_tags":["particulates","power station","coal-fired power station","air pollution","natural gas"],"geography_discussed":["Great Smoky Mountains National Park","Shenandoah National Park","Acadia National Park","Grand Canyon National Park","Yosemite National Park","Mount Rainier National Park","Glacier National Park","Big Bend National Park"],"frame_perspective":[],"analysis_type":["economic impact assessment","policy analysis"]}]}