{"query_echo":{"q":"","filters":{"geography":["Marina catchment area"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'Marina catchment area' for facet 'geography' is not in the controlled vocabulary."}]},"total":{"value":1,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?geography=Marina+catchment+area","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-000207","url":"https://climateinsightsdirectory.org/document/sei-000207","title":"Dry and Wet Atmospheric Deposition of Nitrogen and Phosphorus in Singapore","publisher":{"name":"Stockholm Environment Institute","organization":"stockholm-environment-institute"},"document_type":"research paper","language":"en","date_published":"2011-06-01","source_url":"https://www.sei.org/publications/dry-and-wet-atmospheric-deposition-of-nitrogen-and-phosphorus-in-singapore/","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","analysis_type"],"summary":{"text":"The study measured nitrogen (N) and phosphorus (P) levels in aerosols and rainwater in Singapore's Marina catchment area. It found that wet deposition dominated N fluxes, while dry deposition dominated P fluxes, with both showing seasonal variations. The results suggest that atmospheric nutrient concentrations are influenced by both local emissions and transboundary transport, and the N:P ratio of 10.5 indicates a potential tendency toward N-limitation in local aquatic ecosystems.","ai_generated":true,"unit":"sei-000207#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"For nitrogen species, particularly NO3− and NH4+, wet deposition contributed more to total fluxes than dry deposition, whereas phosphorus species exhibited the opposite trend.","ai_generated":true,"unit":"sei-000207#insight-1","date_modified":"2026-10-23"},{"text":"Total nitrogen (TN) and total phosphorus (TP) wet deposition fluxes peaked in December 2007 and January 2008, while dry deposition fluxes peaked during the inter-monsoon (IM) period.","ai_generated":true,"unit":"sei-000207#insight-2","date_modified":"2026-10-23"},{"text":"Atmospheric nutrient concentrations are influenced by local emissions and transboundary transport from regional sources during different monsoon seasons, with deposition fluxes correlating to meteorological factors.","ai_generated":true,"unit":"sei-000207#insight-3","date_modified":"2026-10-23"},{"text":"The annual total atmospheric deposition flux for the N:P ratio was 10.5, suggesting that Singapore's aquatic ecosystems primarily fed by these nutrients may be N-limited.","ai_generated":true,"unit":"sei-000207#insight-4","date_modified":"2026-10-23"}],"climate_tags":[],"geography_discussed":[],"frame_perspective":[],"analysis_type":["quantitative","environmental monitoring"]}]}