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6 Cards in this Set
- Front
- Back
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chilling injury
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damage or death due to cold, yet above freezing temperatures (32 to 45 oF)
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freeze injury
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damage or death due to temperatures below freezing (below about 28 oF)
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TWO TYPES OF FREEZES BASED ON HOW THEY OCCUR
1) Radiational Freeze or Frost |
temperature drops due to radiational cooling which results
in a temperature inversion; occurs on calm, clear nights. (see diagram on next page) |
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1) Radiational Freeze or Frost
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radiational cooling - loss of heat by long wavelength infrared (IR) radiation.
temperature inversion - a warm air mass above a cold air mass. dew point - the temperature at which air reaches 100% relative humidity. |
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2 Types of Radiational Freezes
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a) white frost - occurs when the temperature drops below both the current dew point (dew forms)
and below freezing (dew freezes). b) black frost - occurs when the temperature drops below freezing, but remains above the current dew point. |
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TWO TYPES OF FREEZES BASED ON HOW THEY OCCUR
2) Advective Freeze |
temperature drops due to the invasion of a cold air mass or convection current.
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