{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T19:36:31Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T00:10:00Z", "ingestedAt": "2026-10-05T20:55:03+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-06T19:52:02+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q7852002", "registryId": "vr.tr.tule-fog", "name": "tule fog", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.FLW" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q7852002/", "model": { "registry_id": "vr.tr.tule-fog", "name": "tule fog", "purpose": "Let an agent recognise tule fog as a regional radiation fog with a season, a place and a known road-safety record, relay forecasts and driving guidance from weather and transport authorities, and separate it from other fog types.", "definition": "A thick ground fog that forms in the Central Valley of California on clear, still nights from late autumn to early spring, when moist air near the surface cools by radiation after rain; named for the tule rushes of the valley wetlands, it can persist for days under a winter high-pressure inversion and is the leading weather cause of road crashes in the region.", "what_it_is_for": "Not for anything; a weather phenomenon.", "affordances": [ "explain how and when it forms", "relay forecasts and visibility warnings", "relay driving guidance from transport authorities", "compare it with coastal and valley fog elsewhere" ], "distinguishing_features": [ "Radiation fog, formed by nocturnal cooling of moist ground air", "Tied to the Central Valley of California and its winter inversions", "Multi-day persistence under high pressure", "Documented cause of chain-reaction road crashes" ], "appearance": "A dense white or grey fog layer hugging the ground, often only tens of metres deep, with clear sky above it.", "visual_identification": [ "Ground fog in the Central Valley of California between about November and March", "Forms on still, clear nights after rain and can last for days", "Coastal fog from the Pacific is advection fog and a different process" ], "physical_properties": [ { "quantity": "visibility", "typical_range": "under 200, sometimes under 3", "unit": "m", "note": "reported minima on valley highways" }, { "quantity": "depth", "typical_range": "tens to a few hundred", "unit": "m", "note": "shallow layer under an inversion" }, { "quantity": "season", "typical_range": "November to March", "unit": "months", "note": "peaks in December and January" } ], "families_and_kinds": [ "dense tule fog with visibility under a few metres", "patchy tule fog along rivers and wetlands", "persistent multi-day episodes under an inversion", "freezing fog on the coldest nights" ], "related_models": [ { "relation": "is a kind of", "target": "radiation fog", "why": "the process that forms it" }, { "relation": "is confused with", "target": "sea fog", "why": "coastal advection fog is a different process" }, { "relation": "occurs in", "target": "Central Valley of California", "why": "the region that names it" }, { "relation": "is related to", "target": "temperature inversion", "why": "the condition that holds it in place" } ], "identifiers": [], "standards_and_regulation": [ "National Weather Service dense fog advisories", "California Department of Transportation fog warning systems and signage", "State road rules on speed and lights in low visibility" ], "failure_modes_and_hazards": [ "Multi-vehicle crashes on valley highways", "Airport delays and closures in the valley", "Frost and freezing fog damage to crops when temperatures fall" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Report tule fog forecasts and visibility warnings from official weather services.", "Explain how and when tule fog forms in the Central Valley." ], "must_not": [ "Route drivers through dense fog without warning of low visibility.", "Operate vehicles or drones at normal speed in fog beyond the agent's sensing range.", "Downplay fog warnings on highways known for multi-vehicle pile-ups." ], "requires_human": [ "Closing roads or school transport because of fog." ] }, "ethics": { "considerations": [ "Tule fog has caused deadly chain collisions on valley highways.", "Fog warnings must reach drivers, schools and farm workers in time." ], "affected_parties": [ "Drivers", "Farm workers", "School children travelling by bus" ] }, "owners": { "steward": "Nobody: a weather phenomenon; weather services issue the warnings.", "master_systems": [] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q7852002: tule fog", "url": "https://www.wikidata.org/wiki/Q7852002", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Tule fog", "url": "https://en.wikipedia.org/wiki/Tule_fog", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "formation", "name": "Formation", "description": "How tule fog forms.", "rationale": "The physics decides the forecast.", "layers": [ { "id": "process", "name": "Process", "description": "Radiation cooling and moisture.", "findings": [ { "id": "process-finding", "name": "Process", "description": "Process.", "questions": [ { "text": "What sequence of rain, clear sky, calm wind and radiative cooling produces tule fog?", "kind": "definition" }, { "text": "Is the fog in question radiation fog or advection fog from the coast?", "kind": "boundary" } ] } ] }, { "id": "season", "name": "Season", "description": "When it happens.", "findings": [ { "id": "season-finding", "name": "Season", "description": "Season.", "questions": [ { "text": "In which months and under which synoptic pattern does tule fog persist for days?", "kind": "measurement" }, { "text": "How is a multi-day episode distinguished from a single night of fog?", "kind": "boundary" } ] } ] } ] }, { "id": "observe", "name": "Observe", "description": "Measuring and forecasting.", "rationale": "Visibility is the operative number.", "layers": [ { "id": "visibility", "name": "Visibility", "description": "Visibility values.", "findings": [ { "id": "visibility-finding", "name": "Visibility", "description": "Visibility.", "questions": [ { "text": "What visibility is reported, and how do advisories define dense fog?", "kind": "measurement" }, { "text": "Which authority issues the advisory for a given stretch of road?", "kind": "provenance" } ] } ] }, { "id": "forecast", "name": "Forecast", "description": "Forecasting.", "findings": [ { "id": "forecast-finding", "name": "Forecast", "description": "Forecast.", "questions": [ { "text": "What signals do forecasters use to predict onset and clearing?", "kind": "provenance" }, { "text": "Where is the current forecast published?", "kind": "action" } ] } ] } ] }, { "id": "safety", "name": "Safety", "description": "Roads and flights.", "rationale": "Crashes are the reason the fog is known.", "layers": [ { "id": "roads", "name": "Roads", "description": "Road safety.", "findings": [ { "id": "roads-finding", "name": "Roads", "description": "Roads.", "questions": [ { "text": "What driving guidance do transport authorities give for dense fog?", "kind": "provenance" }, { "text": "Which entry fits road crash records?", "kind": "action" } ] } ] }, { "id": "aviation", "name": "Aviation", "description": "Airports.", "findings": [ { "id": "aviation-finding", "name": "Aviation", "description": "Aviation.", "questions": [ { "text": "How do valley airports handle low visibility, in general terms?", "kind": "provenance" }, { "text": "Is the user asking about a specific flight, which needs the carrier?", "kind": "boundary" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "Place, agriculture and study.", "rationale": "The fog has a landscape and a history.", "layers": [ { "id": "agriculture", "name": "Agriculture", "description": "Crops and frost.", "findings": [ { "id": "agriculture-finding", "name": "Agriculture", "description": "Agriculture.", "questions": [ { "text": "How does tule fog affect orchards and frost risk?", "kind": "provenance" }, { "text": "Which entry fits frost protection?", "kind": "action" } ] } ] }, { "id": "study", "name": "Study", "description": "Climatology.", "findings": [ { "id": "study-finding", "name": "Study", "description": "Study.", "questions": [ { "text": "What do studies say about changes in fog frequency over decades, with findings attributed?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should tule fog be a separate entry from radiation fog, or a regional instance?", "How should fog advisories be linked?", "How should long-term trends in fog frequency be recorded?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }