{
  "study": "Regional CALMET wind-driver and terrain-support diagnostic",
  "authoring": "Root-authored source inspection and numerical reconstruction; no independent professional or meteorological validation.",
  "equationProtocol": {
    "createdUTC": "2026-09-07T20:35:24.735052+00:00",
    "purpose": "Explain saved CALMET WFACE values before any transport calculation; no new meteorology run or fitted choice.",
    "inputs": {
      "work/regional-calmet-june2023/wind-fields.npz": "9aceea8ad62b758360f08a27e3786f295b4e56b148b7aa27829ff56d07aaf3a5",
      "work/regional-calmet-june2023/protocol.json": "c255a475ae9b4e8b33ad50b417dab235048b8208c283958b8f5c468ebe1dbfed",
      "work/calmet65-local/source/original/CALMET_v6.5.0_L150223/CALMET.FOR": "fc7fda7cb7e7932f67eb0ce1fb94f1d81a2084063a1dbf797b3270b460b7ee6f"
    },
    "scope": "All three saved cases, 24 hours, 10 top faces, every interior cell for equation reconstruction. No outer ghost-boundary reconstruction claimed.",
    "equation": "With IOBR=0, DIAGNO zeroes W then integrates -(du/dx+dv/dy)*layer_thickness from the ground; DIVCEL uses centred differences over 2*200 m. Reconstruct in float64 from saved float32 U/V.",
    "interpretation": "WFACE is the model terrain-following component, not automatically Cartesian vertical air motion; source DIAGNO/TOPOF2/OUTH R establish coordinate and output conventions.",
    "diagnostics": [
      "All layer distributions of absolute W with percentiles 50,90,95,99,99.9 and maximum",
      "Counts above diagnostic magnitudes 1,3,5 m/s; these are not physical rejection criteria or health thresholds",
      "Each case global maximum location and profile; distance to nearest boundary",
      "Existing three reference-point profiles over every hour; no house-location inference",
      "Per-layer divergence contribution at each global maximum and aggregate continuity residual"
    ],
    "numericalCriterion": "Absolute residual <= 0.00005 m/s at all reconstructed interior W points, allowance for accumulated binary32 arithmetic; report actual maximum and failures. Passing only checks source/output interpretation.",
    "nextStepRule": "Decide any further model sensitivity after this diagnostic; do not change switches solely to reduce W or force a community plume result."
  },
  "equationResults": {
    "createdUTC": "2026-09-07T20:36:25.661496+00:00",
    "protocolSha256": "a93d073591c6371db2245e64fc04f55d1a9b31c5f8c71ab1b2a01877e6170e84",
    "caseResults": [
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            "countsAboveDiagnosticCutoffs": {
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            "sampleCount": 244824
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        ],
        "referencePoints": [
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            "name": "Brackendale",
            "modelTerrainM": 23.1793270111084,
            "nearestDomainBoundaryM": 3100.0,
            "lowest20mTopFaceWrangeMs": [
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            "allFacesWrangeMs": [
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          },
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            "allFacesWrangeMs": [
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          },
          {
            "name": "Woodfibre LNG site proxy",
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            "allFacesWrangeMs": [
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        ]
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    ],
    "coordinateMeaning": "Saved WFACE is the terrain-following component from CALMET DIAGNO, not a direct observation or Cartesian vertical velocity.",
    "limits": "Equation reconstruction establishes what this calculation did, not physical wind accuracy. Diagnostic cutoffs are not safety/acceptance thresholds."
  },
  "factorialProtocol": {
    "createdUTC": "2026-09-07T20:38:15.200020+00:00",
    "purpose": "Attribute differences in computed winds to thermal blocking and slope-flow switches; no setting is selected as more accurate from this test.",
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          "ZUPWND": " 1., 1000. ",
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          "FCORIOL": " 1.0E-04",
          "IAVEZI": "  1  ",
          "MNMDAV": "  10  ",
          "HAFANG": " 30. ",
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          "ICOOL": "  0   ",
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          "NUMTS": " 5  ",
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          "TGDEFB": " -0.0098 ",
          "TGDEFA": " -0.0045 ",
          "JWAT1": " 999 ",
          "JWAT2": " 999 ",
          "NFLAGP": "  2  ",
          "SIGMAP": " 50. ",
          "CUTP": " 0.01 "
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    ],
    "existingReferenceCases": [
      "wrf-interpolation",
      "terrain-10km"
    ],
    "baselineRadiusNote": "The previously calculated both-off case retains TERRAD=5 km. With IFRADJ=ISLOPE=0, HMAX produced by TERSET does not feed FRADJ or SLOPE; it is not used by the common interpolation/continuity path. Source audit, not a new numerical identity test.",
    "frozenAnalysis": [
      "Require complete 24-hour finite U/V/W fields and unchanged model/input hashes.",
      "Compare all matching cells/hours/layers, original three references and the previously identified extreme column; do not select only favourable locations.",
      "Compute factorial interaction Both - BlockingOnly - SlopeOnly + Neither for each wind component. Interaction indicates settings are not additive.",
      "Report W as terrain-following. Magnitude reduction is not validation. Keep all results regardless of direction."
    ],
    "fixedConditions": "Same first day, vertical grid, heat-flux assumptions, IOBR=0, no observations and missing-SST fallback. No emissions."
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        "finishedUTC": "2026-09-07T20:38:28.691757+00:00",
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          {
            "name": "Woodfibre LNG site proxy",
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            "name": "Brackendale",
            "windSpeedLowestLayerRangeMs": [
              0.5704646664602225,
              7.977199228151037
            ],
            "allFacesWrangeMs": [
              -1.6234468221664429,
              1.2014501094818115
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          },
          {
            "name": "Squamish",
            "windSpeedLowestLayerRangeMs": [
              0.29461148066566667,
              9.06562134366642
            ],
            "allFacesWrangeMs": [
              -0.5158017873764038,
              1.537764072418213
            ]
          },
          {
            "name": "Woodfibre LNG site proxy",
            "windSpeedLowestLayerRangeMs": [
              0.5751140892195791,
              2.8987500822264063
            ],
            "allFacesWrangeMs": [
              -0.8845498561859131,
              3.029981851577759
            ]
          }
        ]
      },
      {
        "case": "slope",
        "absoluteWmaxMs": 4.572983741760254,
        "maxLocation": {
          "hourFixedPST": 22,
          "topFaceMAboveTerrain": 3000.0,
          "rowSouth0": 40,
          "columnWest0": 44,
          "wTerrainFollowingMs": -4.572983741760254
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        "previousBothCaseExtremeWms": -0.8282080888748169,
        "referencePoints": [
          {
            "name": "Brackendale",
            "windSpeedLowestLayerRangeMs": [
              0.6315367665993025,
              7.996494471626928
            ],
            "allFacesWrangeMs": [
              -0.16138646006584167,
              0.4381553530693054
            ]
          },
          {
            "name": "Squamish",
            "windSpeedLowestLayerRangeMs": [
              0.34330279665414054,
              9.065624263568937
            ],
            "allFacesWrangeMs": [
              -0.5157984495162964,
              0.5587527751922607
            ]
          },
          {
            "name": "Woodfibre LNG site proxy",
            "windSpeedLowestLayerRangeMs": [
              0.6815085619832406,
              4.228213842123735
            ],
            "allFacesWrangeMs": [
              -0.6425739526748657,
              0.6505075097084045
            ]
          }
        ]
      }
    ],
    "horizontalComparisons": [
      {
        "first": "neither",
        "second": "blocking",
        "allLayersMeanVectorDifferenceMs": 0.16431292062273475,
        "allLayersMaxVectorDifferenceMs": 5.770251446558795,
        "lowestLayerMeanVectorDifferenceMs": 0.309536301885555,
        "lowestLayerMaxVectorDifferenceMs": 5.067357742456874,
        "referencePoints": [
          {
            "name": "Brackendale",
            "meanVectorDifferenceMs": 0.2992476100507497,
            "maxVectorDifferenceMs": 3.1066435804623334
          },
          {
            "name": "Squamish",
            "meanVectorDifferenceMs": 0.06924896312263881,
            "maxVectorDifferenceMs": 0.28867662607207095
          },
          {
            "name": "Woodfibre LNG site proxy",
            "meanVectorDifferenceMs": 0.9320913458693175,
            "maxVectorDifferenceMs": 2.882858707166744
          }
        ]
      },
      {
        "first": "neither",
        "second": "slope",
        "allLayersMeanVectorDifferenceMs": 0.1764327540519858,
        "allLayersMaxVectorDifferenceMs": 3.257767801550633,
        "lowestLayerMeanVectorDifferenceMs": 0.7921417901289876,
        "lowestLayerMaxVectorDifferenceMs": 3.257767801550633,
        "referencePoints": [
          {
            "name": "Brackendale",
            "meanVectorDifferenceMs": 0.4788606656781056,
            "maxVectorDifferenceMs": 1.7046139494971757
          },
          {
            "name": "Squamish",
            "meanVectorDifferenceMs": 0.009594367092090194,
            "maxVectorDifferenceMs": 0.037308913051656685
          },
          {
            "name": "Woodfibre LNG site proxy",
            "meanVectorDifferenceMs": 0.39915347436926824,
            "maxVectorDifferenceMs": 1.3304895886991932
          }
        ]
      },
      {
        "first": "neither",
        "second": "both",
        "allLayersMeanVectorDifferenceMs": 0.29676689687822866,
        "allLayersMaxVectorDifferenceMs": 8.09820098563213,
        "lowestLayerMeanVectorDifferenceMs": 0.8591664231440267,
        "lowestLayerMaxVectorDifferenceMs": 7.979581774031425,
        "referencePoints": [
          {
            "name": "Brackendale",
            "meanVectorDifferenceMs": 0.7653625845834479,
            "maxVectorDifferenceMs": 3.0828438857511697
          },
          {
            "name": "Squamish",
            "meanVectorDifferenceMs": 0.07410597228571103,
            "maxVectorDifferenceMs": 0.2842244986348037
          },
          {
            "name": "Woodfibre LNG site proxy",
            "meanVectorDifferenceMs": 1.311819548259616,
            "maxVectorDifferenceMs": 2.866592647707751
          }
        ]
      },
      {
        "first": "blocking",
        "second": "both",
        "allLayersMeanVectorDifferenceMs": 0.17695984833274,
        "allLayersMaxVectorDifferenceMs": 6.089646205226097,
        "lowestLayerMeanVectorDifferenceMs": 0.792608911243751,
        "lowestLayerMaxVectorDifferenceMs": 6.089646205226097,
        "referencePoints": [
          {
            "name": "Brackendale",
            "meanVectorDifferenceMs": 0.4788606271301898,
            "maxVectorDifferenceMs": 1.7046138370252206
          },
          {
            "name": "Squamish",
            "meanVectorDifferenceMs": 0.009594361508193022,
            "maxVectorDifferenceMs": 0.037308913051656685
          },
          {
            "name": "Woodfibre LNG site proxy",
            "meanVectorDifferenceMs": 0.39915345005944736,
            "maxVectorDifferenceMs": 1.3304895886991932
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        ]
      },
      {
        "first": "slope",
        "second": "both",
        "allLayersMeanVectorDifferenceMs": 0.16461042682277566,
        "allLayersMaxVectorDifferenceMs": 5.7722747751037735,
        "lowestLayerMeanVectorDifferenceMs": 0.30968935766067685,
        "lowestLayerMaxVectorDifferenceMs": 5.1558557856344525,
        "referencePoints": [
          {
            "name": "Brackendale",
            "meanVectorDifferenceMs": 0.2992476245992129,
            "maxVectorDifferenceMs": 3.1066435804623334
          },
          {
            "name": "Squamish",
            "meanVectorDifferenceMs": 0.06924901291822368,
            "maxVectorDifferenceMs": 0.288676461200141
          },
          {
            "name": "Woodfibre LNG site proxy",
            "meanVectorDifferenceMs": 0.932091379460671,
            "maxVectorDifferenceMs": 2.882858883821305
          }
        ]
      }
    ],
    "claims": "Controlled wind-driver sensitivity, not source attribution of observed weather or a finding that one setting is more accurate. No chemicals released.",
    "factorialInteraction": {
      "meaning": "Both - BlockingOnly - SlopeOnly + Neither for U,V,W; vector norm for horizontal interaction. Calculated differences include rounding.",
      "lowestLayerHorizontalMeanMs": 0.0005839007698409935,
      "lowestLayerHorizontalMaxMs": 3.0562589702359504,
      "allLayersHorizontalMaxMs": 3.205785610524437,
      "WabsoluteMaxMs": 3.4759154319763184,
      "referencePoints": [
        {
          "name": "Brackendale",
          "meanHorizontalInteractionMs": 3.1277510653873567e-07,
          "maxHorizontalInteractionMs": 9.830249847454215e-07
        },
        {
          "name": "Squamish",
          "meanHorizontalInteractionMs": 1.2776170856083587e-07,
          "maxHorizontalInteractionMs": 8.596304119739507e-07
        },
        {
          "name": "Woodfibre LNG site proxy",
          "meanHorizontalInteractionMs": 9.77173059868167e-08,
          "maxHorizontalInteractionMs": 3.371747880871523e-07
        }
      ]
    }
  },
  "terrainSearchSupport": {
    "createdUTC": "2026-09-07T20:43:12.341258+00:00",
    "basis": "CALMET TERSET clips the crest/valley search indices to NX/NY, then retains candidates within TERRAD. Geometric support only; whether any selected crest/valley changes requires actual buffered terrain.",
    "cases": [
      {
        "terrainRadiusM": 5000,
        "searchSteps": 25,
        "totalCells": 10201,
        "cellsWithFullSearchSupport": 2601,
        "cellsWithTruncatedSearchSupport": 7600,
        "percentFullySupported": 25.49750024507401,
        "referencePoints": [
          {
            "name": "Brackendale",
            "nearestTerrainGridCentreEdgeM": 3000,
            "nearestOuterCellBoundaryM": 3100,
            "fullSearchCircleWithinRetainedTerrainGrid": false
          },
          {
            "name": "Squamish",
            "nearestTerrainGridCentreEdgeM": 5400,
            "nearestOuterCellBoundaryM": 5500,
            "fullSearchCircleWithinRetainedTerrainGrid": true
          },
          {
            "name": "Woodfibre LNG site proxy",
            "nearestTerrainGridCentreEdgeM": 5800,
            "nearestOuterCellBoundaryM": 5900,
            "fullSearchCircleWithinRetainedTerrainGrid": true
          }
        ]
      },
      {
        "terrainRadiusM": 10000,
        "searchSteps": 50,
        "totalCells": 10201,
        "cellsWithFullSearchSupport": 1,
        "cellsWithTruncatedSearchSupport": 10200,
        "percentFullySupported": 0.009802960494069209,
        "referencePoints": [
          {
            "name": "Brackendale",
            "nearestTerrainGridCentreEdgeM": 3000,
            "nearestOuterCellBoundaryM": 3100,
            "fullSearchCircleWithinRetainedTerrainGrid": false
          },
          {
            "name": "Squamish",
            "nearestTerrainGridCentreEdgeM": 5400,
            "nearestOuterCellBoundaryM": 5500,
            "fullSearchCircleWithinRetainedTerrainGrid": false
          },
          {
            "name": "Woodfibre LNG site proxy",
            "nearestTerrainGridCentreEdgeM": 5800,
            "nearestOuterCellBoundaryM": 5900,
            "fullSearchCircleWithinRetainedTerrainGrid": false
          }
        ]
      }
    ],
    "prospectiveTerrainSearchEnvelope": {
      "originalGridCells": [
        101,
        101
      ],
      "minimumNominalPaddingFor10kmSearch": {
        "cellsPerSide": 50,
        "metresPerSide": 10000
      },
      "paddedGridCells": [
        201,
        201
      ],
      "paddedUTMOuterBoundsM": [
        464000,
        5485600,
        504200,
        5525800
      ],
      "scope": "Geometric minimum for supplying terrain searches for the original display grid, not an adequate meteorological/transport domain or a convergence result. Additional weather interpolation and physical boundary support must be evaluated."
    },
    "conclusion": "Current Brackendale terrain searches are truncated at both radii. Radius differences cannot be treated as an uncertainty bracket for a fully buffered physical model."
  },
  "sourceLocations": {
    "coordinateMeaning": "CALMET.FOR DIAGNO 5261\u20135277, TOPOF2 32043\u201332050",
    "divergenceAndIntegration": "CALMET.FOR 6121\u20136160, DIVCEL 6246\u20136303",
    "topFaceOutput": "CALMET.FOR OUTHR 13160\u201313165",
    "terrainSearchClipping": "CALMET.FOR TERSET 31805\u201331902"
  },
  "publicFileHashes": {
    "woodfibre-regional-wind-drivers.md": "d4663c3ece20d27986b99d962c79627939dbf5205cd84c44e713eefeddd49f4c",
    "woodfibre-regional-wind-drivers-points.csv": "13fc005ddda26746568e8cb84a88c77fde342b224be197992536d71581d97150",
    "woodfibre-regional-wind-drivers-vertical.csv": "b815569250c5c46baf3f3e16c82932bc3cd917b27c97dc138442c10a8aff169c"
  }
}