{"query_echo":{"q":"","filters":{"geography":["Western United States"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'Western United States' for facet 'geography' is not in the controlled vocabulary."}]},"total":{"value":24,"relation":"eq"},"page":2,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?geography=Western+United+States&page=2","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":"ucs-000034","url":"https://climateinsightsdirectory.org/document/ucs-000034","title":"Western Wildfires and Climate Change","publisher":{"name":"Union of Concerned Scientists","organization":"union-of-concerned-scientists"},"document_type":"fact sheet","language":"en","date_published":"2013-07-22","source_url":"https://www.ucs.org/resources/western-wildfires-and-climate-change","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"Wildfires in the Western U.S. are becoming more frequent and the wildfire season is lengthening, driven by regional temperature increases that are double the global average and earlier spring snowmelt.","ai_generated":true,"unit":"ucs-000034#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"The frequency of large wildfires, defined as those exceeding 1,000 acres, has increased in every Western U.S. state over the last 12 years when compared to the 1980-2000 annual average. Additionally, while local variations exist, wildfire seasons across the region have almost universally lengthened over the last 40 years.","ai_generated":true,"unit":"ucs-000034#insight-1","date_modified":"2026-10-23"},{"text":"The Western U.S. is warming at approximately twice the global average rate, with average annual temperatures rising by 1.9° F since 1970. This warming is associated with spring snowmelt occurring 1 to 4 weeks earlier than in the late 1940s, depending on the location.","ai_generated":true,"unit":"ucs-000034#insight-2","date_modified":"2026-10-23"},{"text":"Projections indicate that every ecosystem type in the region will experience an increase in average annual burn area, though the impact varies by ecosystem; for example, the Southern Rocky Mountain Steppe-Forest of central Colorado is expected to be more affected than the semi-desert and desert regions of southern Arizona and California.","ai_generated":true,"unit":"ucs-000034#insight-3","date_modified":"2026-10-23"}],"climate_tags":["wildfire","climate change"],"geography_discussed":["Colorado","Arizona","California","World"],"frame_perspective":[],"analysis_type":["trend analysis","projection"]},{"id":"climcent-000125","url":"https://climateinsightsdirectory.org/document/climcent-000125","title":"Lost Winter: Above-freezing days added by climate change","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"fact sheet","language":"en","date_published":null,"source_url":"https://www.climatecentral.org/toolkit-snow-and-ice","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"Climate change is increasing the number of winter days with minimum temperatures above freezing across the Northern Hemisphere, leading to a reduction in snow cover and freshwater supplies. In the contiguous U.S., annual snowfall has decreased at 64% of 2,041 stations since 1970, and snow-derived freshwater in the western U.S. has fallen by 15-30% since 1955, with a further 25% decline projected by 2050.","ai_generated":true,"unit":"climcent-000125#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Human-caused warming has led to a significant increase in 'lost winter days'—days with minimum temperatures above freezing—across the Northern Hemisphere, contributing to the shrinkage of ice sheets, glaciers, sea ice, permafrost, and snow cover.","ai_generated":true,"unit":"climcent-000125#insight-1","date_modified":"2026-10-23"},{"text":"In the contiguous United States, snowfall is decreasing as a warming atmosphere holds approximately 4% more moisture per 1°F of warming, causing more precipitation to fall as rain. Since 1970, annual snowfall has decreased at 64% of 2,041 stations, and over 80% of 170 weather stations report less snow than in the late 1940s.","ai_generated":true,"unit":"climcent-000125#insight-2","date_modified":"2026-10-23"},{"text":"Snow-derived freshwater in the western U.S. decreased by 15-30% between 1955 and the present, and is projected to decline by an additional 25% by 2050. Globally, Northern Hemisphere snow cover is estimated to decrease at a rate of -8% per 1.8°F (1°C) of global surface air warming.","ai_generated":true,"unit":"climcent-000125#insight-3","date_modified":"2026-10-23"}],"climate_tags":["climate change"],"geography_discussed":["United States","Western United States"],"frame_perspective":[],"analysis_type":["trend analysis","projection"]},{"id":"climcent-000142","url":"https://climateinsightsdirectory.org/document/climcent-000142","title":"Warmer, Thirstier Air Worsens Drought","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"fact sheet","language":"en","date_published":null,"source_url":"https://www.climatecentral.org/toolkit-drought","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"Human-caused warming increases atmospheric thirst, leading to higher evaporation and transpiration, which worsens droughts globally and specifically in the western U.S. In the southwestern U.S., the 2000-2021 megadrought was the most severe in 1,200 years, with over 40% of its severity attributed to climate change. The western U.S. faces increasing risks of hydrological drought from declining snowpack and compound events involving heat, drought, and wildfires, which caused over $38 billion in damages during 2020-2021.","ai_generated":true,"unit":"climcent-000142#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Human-caused warming increases the potential for evaporation from land and transpiration from plants, which contributes to drying in many regions of the world, although trends remain unclear in some areas.","ai_generated":true,"unit":"climcent-000142#insight-1","date_modified":"2026-10-23"},{"text":"The southwestern United States has seen a clear increase in droughts tied to human-caused climate change; specifically, the megadrought from 2000 to 2021 was the most severe in 1,200 years, and more than 40% of its severity is linked to human-caused warming.","ai_generated":true,"unit":"climcent-000142#insight-2","date_modified":"2026-10-23"},{"text":"The western U.S. is experiencing increased risks of hydrological drought due to earlier spring melt and declining snowpack, as well as compound events. In 2020 and 2021, a series of compound heat, drought, and wildfire events caused damages exceeding $38 billion.","ai_generated":true,"unit":"climcent-000142#insight-3","date_modified":"2026-10-23"}],"climate_tags":["drought","climate change","heat wave"],"geography_discussed":["United States","Western United States","Southwestern United States"],"frame_perspective":[],"analysis_type":["impact assessment"]},{"id":"wri-000545","url":"https://climateinsightsdirectory.org/document/wri-000545","title":"Western U.S. Wildfires and the Climate Change Connection","publisher":{"name":"World Resources Institute","organization":"world-resources-institute"},"document_type":"fact sheet","language":"en","date_published":null,"source_url":"https://www.wri.org/research/western-us-wildfires-and-climate-change-connection","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"Climate change is identified as a significant driver of altered fire activity in the Western United States, where rising temperatures and earlier snowmelt are linked to more frequent and longer-lasting large wildfires.","ai_generated":true,"unit":"wri-000545#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Climate change is a major factor in the changing patterns of fire activity in the Western U.S., with rising global temperatures expected to further increase the risk and frequency of large wildfires.","ai_generated":true,"unit":"wri-000545#insight-1","date_modified":"2026-10-23"}],"climate_tags":["wildfire","climate change"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["fact sheet"]}]}