How much would the average temperature on earth decrease if the Yellowstone vulcano erupted?

If the Yellowstone supervolcano erupted with a significant magnitude, it could potentially release vast amounts of ash and sulfur dioxide into the atmosphere. This could lead to a temporary decrease in global temperatures by several degrees Celsius, possibly lasting for a few years due to the aerosol effect, which reflects sunlight away from the Earth. Historical eruptions, such as the Toba eruption around 74,000 years ago, have shown that such events can lead to substantial climatic disruptions. However, the exact impact would depend on the eruption's scale and duration.