by Josh McDaniel
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Blazing Addles
What climate scientists have learned from Western wildfires 9
Posted 3 years, 1 month ago Many wildland firefighters carry an instrument called a sling psychrometer. It consists of two encased thermometers, and is swung above the head on a short rope -- making the firefighters appear not unlike David readying to slay Goliath. The instrument gives a quick field reading of relative humidity, one of the most important factors in predicting what a wildfire is going to do. Quick drops in relative humidity are a sure signal that the air is getting drier and that a fire is about to turn ugly.
Photo: iStockphoto
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