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The ventilation index is a product of surface windspeed and mixing height. Ventilation Index can be computed with winds at different levels above the ground. Because this climatology uses surface winds instead of higher, transport-level winds, it is a conservative estimate of ventilation potential and most applicable to smoke that remains relatively close to the ground.

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Tools are provided for research purposes only, and may not accurately reflect what may happen due to numerous reasons. Data are provisional; use at own risk.