{"query_echo":{"q":"","filters":{"analysis_type":["regional modelling"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'regional modelling' 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=regional+modelling","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":"sei-001374","url":"https://climateinsightsdirectory.org/document/sei-001374","title":"Ozone: a threat to food security in South Asia","publisher":{"name":"Stockholm Environment Institute","organization":"stockholm-environment-institute"},"document_type":"policy brief","language":"en","date_published":"2008","source_url":"https://www.sei.org/mediamanager/documents/Publications/Climate/food_security_ozone_climate_policybrief.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The document examines how ground-level ozone (O3) reduces crop yields in South Asia, specifically within the Indo-Gangetic Plain. It finds that current O3 concentrations cause yield losses between 5% and 35%, resulting in estimated annual economic losses of approximately US$ 3.9 billion for staple crops. The brief highlights that O3 concentrations are projected to increase more rapidly in South Asia than in any other global region by 2030. It argues that these impacts may be more immediate than those of climate change and could contribute to the recent decline in crop yield growth in the region. The authors recommend international cooperation to reduce precursor emissions, the development of O3-resistant crop varieties, and improved integration of air quality and food security into policy frameworks.","ai_generated":true,"unit":"sei-001374#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Current ground-level ozone (O3) concentrations are reducing crop yields by 5% to 35% at important agricultural sites across South Asia.","ai_generated":true,"unit":"sei-001374#insight-1","date_modified":"2026-10-23"},{"text":"The estimated annual economic loss for four staple crops (wheat, rice, soybean, and potato) in the Malé countries of Bangladesh, Bhutan, India, Nepal, Pakistan, and Sri Lanka is approximately US$ 3.9 billion, with the highest losses occurring in India (US$ 3.1 billion), Bangladesh (US$ 0.4 billion), and Pakistan (US$ 0.35 billion).","ai_generated":true,"unit":"sei-001374#insight-2","date_modified":"2026-10-23"},{"text":"South Asia is projected to experience the highest increase in surface O3 of any global region by 2030, with average annual increases of 7.2 ppb under current emission control legislation.","ai_generated":true,"unit":"sei-001374#insight-3","date_modified":"2026-10-23"},{"text":"Current yield losses attributed to O3 (5-35%) are greater than the projected losses due to climate change by the end of the century (up to 30%), suggesting O3 is a more immediate threat to food security in South Asia.","ai_generated":true,"unit":"sei-001374#insight-4","date_modified":"2026-10-23"},{"text":"A synthesis of Asian data indicates that yield losses for staple crops are significant: wheat ranges from 5–48%, rice from 3-47%, and legumes from 10-65%.","ai_generated":true,"unit":"sei-001374#insight-5","date_modified":"2026-10-23"},{"text":"Existing dose-response relationships from the United States and Europe may underestimate the sensitivity of crops and varieties grown under Asian conditions, potentially leading to an underestimation of economic and yield losses.","ai_generated":true,"unit":"sei-001374#insight-6","date_modified":"2026-10-23"},{"text":"O3 may be a significant factor in the recent deceleration of crop yield growth in South Asia, potentially limiting the CO2 fertilization effect that could otherwise mitigate temperature-induced stress.","ai_generated":true,"unit":"sei-001374#insight-7","date_modified":"2026-10-23"}],"climate_tags":["food security","crop yield","greenhouse gas","climate change","agricultural productivity"],"geography_discussed":["India","Pakistan","Bangladesh","Bhutan","Nepal","Sri Lanka","Lahore","Varanasi","United States","Europe"],"frame_perspective":[],"analysis_type":["economic impact assessment","regional modelling","experimental synthesis"]}]}