{"query_echo":{"q":"","filters":{"analysis_type":["empirical measurement"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'empirical measurement' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":1,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=empirical+measurement","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":"iai-000183","url":"https://climateinsightsdirectory.org/document/iai-000183","title":"Ciclo del Nitrógeno en América Latina: Impulsores, Impactos y Vulnerabilidades","publisher":{"name":"Inter-American Institute for Global Change Research","organization":"inter-american-institute-for-global-change-research"},"document_type":"executive summary","language":"en","date_published":"2024-09-22","source_url":"https://iai.int/en/ciclo-del-nitrogeno-en-america-latina-impulsores-impactos-y-vulnerabilidades-crn-3005/","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The project aims to create a regional understanding of the nitrogen cycle in Latin America by measuring biological nitrogen fixation, atmospheric deposition, and the impacts of land-use changes. Initial findings include high nitrogen pollution in Venezuelan rivers, low biological nitrogen fixation in Chilean forests affected by copper mining, and the influence of urban and industrial areas on NOx concentrations in São Paulo. The initiative seeks to provide guidelines for policymakers to manage nitrogen and minimize environmental degradation.","ai_generated":true,"unit":"iai-000183#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"In Mexico, measurements of ∂15-N abundance indicate that 30-50% of nitrogen in native plants is biologically fixed, with standing vegetation containing 70-100 kg N /ha and a turnover of 20-30 kg N /ha/yr.","ai_generated":true,"unit":"iai-000183#insight-1","date_modified":"2026-10-23"},{"text":"Biological Nitrogen Fixation (BNF) in Chilean forests is extremely low and is further inhibited by contaminants from copper mining.","ai_generated":true,"unit":"iai-000183#insight-2","date_modified":"2026-10-23"},{"text":"Nitrogen deposition in Northern Argentina is approximately 8 kg N /ha/y. In São Paulo State, maps of air contaminants show high NOx concentrations driven by the city and industrial areas, while rural animal production sites contribute NH3.","ai_generated":true,"unit":"iai-000183#insight-3","date_modified":"2026-10-23"},{"text":"Analysis of river data from Venezuela reveals that some rivers are polluted with nitrogen concentrations 60 times higher than background levels in the Amazon and Orinoco.","ai_generated":true,"unit":"iai-000183#insight-4","date_modified":"2026-10-23"},{"text":"The project is analyzing the expansion of soy production in Bolivia to assess potential future impacts including water contamination, soil degradation, and increased fertilizer use.","ai_generated":true,"unit":"iai-000183#insight-5","date_modified":"2026-10-23"}],"climate_tags":["land-use change","water pollution"],"geography_discussed":["Mexico","Chile","Bolivia","Brazil","Argentina","São Paulo","Venezuela","United States"],"frame_perspective":[],"analysis_type":["empirical measurement","regional modeling","literature review"]}]}