Feature Ground Frost

A ground frost refers to the formation of ice on the ground, objects or trees, whose surface have a

temperature below the freezing point of water. During situations when the ground cools quicker than the air, a ground frost can occur without an air frost. A grass frost, an un-official type of ground frost,

can occur when other surfaces – such as concrete or road surfaces – don’t experience a frost, due to their better ability at holding onto any warmth. It

is possible for a grass frost to occur in late spring or even early summer when the risk of more wide-

spread frosts has disappeared and is something that gardeners in particular need to be aware of.

A noteworthy point to remember is

when you see a weather report on TV or your mobile the temperature you are given will be an air temperature which is always warmer than the ground temperature. When the temperature of the ground drops below 0° Celsius (32° Fahrenheit), it freezes. However, the ground temperature can be different from the temperature of the air above it. Layers deep within the ground may be colder or warmer than layers near the surface of the ground.

Hoar Frost

Hoar frost is composed of tiny ice crystals and is formed by the same process as dew, but when the temperature of the surface is below freezing point. The ‘feathery’

variety of hoar frost forms when the surface temperature reaches freezing point before dew begins to form on it. A ‘white’ frost, composed of more globular ice, occurs when the dew forms first, then subsequently

freezes. The presence of fog tends to prevent the formation of hoar frost as it reduces the potential for radiational cooling of surfaces.

The Forecast used for Winter Maintenance cover should always be based on surface temperatures. As demonstrated in recent years, our

weather patterns here in the UK are becoming less predictable and are now punctuated with more severe weather events – ‘Beast from the East’, heatwaves, severe rain and flooding. This has resulted in some of the coldest winter months since records began in 1910; and current forecasting predictions are that it will

continue this way for the foreseeable future. To ensure that your property or your

clients’ properties are covered for future bad winters The Gritting Company can provide peace of mind along with a comprehensive one stop shop to cover all your winter maintenance requirements.

Please contact us at: 0113 253 2191

fmuk 15

Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44