Transcription of 3. Mist and Fog Forecasting Techniques
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3. Mist and Fog Forecasting Techniques
3. Mist and Fog Forecasting Techniques Mist is defined as .. a suspension in the air of microscopic water droplets or wet hygroscopic particles, reducing visibility at the earth's surface. used when visibility is 1000m and 5000m and RH >95%. Tdry-Tdew C. Crown copyright 2004 Page 2. Fog is defined as .. a suspension of microscopic water droplets in the air reducing visibility at the earth's surface to: < 1000m for met. observations, aviation and shipping < 200m (dense fog) for public service purposes Tdry Tdew. Crown copyright 2004 Page 3. Freezing fog and ice fog Freezing fog Supercooled drops which freeze on impact with a surface (produce rime). Ice fog Tiny suspended ice particles Requires T -30 C.
3. Mist and Fog Forecasting Techniques. © Crown copyright 2004 Page 2 Mist is defined as ... … a suspension in the air of microscopic
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