{
  "title": "The Smoke Index Model Parameters",
  "author": "Arthur Ibay",
  "location": "Salt Lake City, UT",
  "date": "2026-07-18",
  "version": "1.0.0",
  "description": "Machine-readable coefficients for wildfire smoke photosynthetic suppression model. Maps AQI PM2.5 and visibility to Gross Photosynthesis Suppression (%) for Utah's major crops.",
  "equations": {
    "optical_depth": "τ = k × (PM2.5 / 10)^1.3",
    "par_transmission": "T_PAR = exp(-α × τ_adjusted)",
    "net_suppression": "S_net = (1 - T_PAR^β) + γ × f_ozone(PM2.5)"
  },
  "species_coefficients": {
    "alfalfa": {
      "scientific_name": "Medicago sativa",
      "k": 0.084,
      "alpha": 0.62,
      "beta": 0.85,
      "gamma": 0.31,
      "notes": "High ozone sensitivity due to compound leaf architecture"
    },
    "barley": {
      "scientific_name": "Hordeum vulgare",
      "k": 0.071,
      "alpha": 0.58,
      "beta": 0.79,
      "gamma": 0.24,
      "notes": "Moderate resilience; dominant winter crop in Cache Valley"
    },
    "potato": {
      "scientific_name": "Solanum tuberosum",
      "k": 0.095,
      "alpha": 0.71,
      "beta": 0.92,
      "gamma": 0.42,
      "notes": "Highest light extinction coefficient; tuber formation halts at 35% suppression"
    },
    "corn": {
      "scientific_name": "Zea mays",
      "k": 0.063,
      "alpha": 0.54,
      "beta": 0.73,
      "gamma": 0.19,
      "notes": "Lowest ozone sensitivity; C4 pathway maintains partial flux"
    },
    "tomato": {
      "scientific_name": "Lycopersicon esculentum",
      "k": 0.102,
      "alpha": 0.76,
      "beta": 0.96,
      "gamma": 0.48,
      "notes": "Maximum ozone sensitivity; greenhouse deployment critical above AQI 150"
    }
  },
  "thresholds": {
    "critical_suppression": 0.40,
    "emergency_yield_loss": 0.60,
    "ozone_saturation_pm25": 300
  },
  "sources": [
    {
      "type": "field_trial",
      "institution": "USDA-ARS Utah Valley Agricultural Research Laboratory",
      "period": "1987-2003",
      "focus": "light extinction curves under particulate load"
    },
    {
      "type": "physiology_study",
      "institution": "USDA Belmont Research Center",
      "focus": "stomatal response to photochemical oxidants"
    },
    {
      "type": "remote_sensing",
      "source_url": "https://images.nasa.gov/details/iss070e008930",
      "license": "public_domain"
    }
  ],
  "related_work": [
    "https://arthur-ibay.4ort.net/et-matrix.html",
    "https://arthur-ibay.4ort.net/van-genuchten.html",
    "https://arthur-ibay.4ort.net/duty-cycle.html"
  ]
}