Ice storms, also referred to as glaze storms, cause considerable damage every year to trees in urban and natural areas. They vary considerably in their severity and frequency. Ice storms are result of the ice formation process, which is influenced by general weather patterns. Ice accumulates when super cooled rain freezes on contact with surfaces, such as tree branches, that are at or below the freezing point (0'C). This generally occurs when a winter warm front passes through an area after the ground-level temperature reaches or falls below freezing. Rain falls through layers of cooler air without freezing, becoming super cooled. Periodically, other climatic events, including stationary, occluded, and cold fronts, also result in ice storms.

The purpose of this paper is to gain a better understanding of the1998 ice storm. This paper features three main section: An introduction, the main body (damage to woodland), and finally, a conclusion. In the main body of this paper, the effect of fire and pest/disease is discussed in detail. In the conclusion, comparison is made between fire and pests/disease versus ice storm. By the end of this paper, one should g

THE WORST STORM IN CANADIAN HISTORY

The extent of the area affected by the ice was enormous. Freezing precipitation is often described as "a line of" or "spotty occurrences of". At the peak of the storm, the area of freezing precipitation extended from Muskoka and Kitchener in Ontario through eastern Ontario, western Quebec and the Eastern Townships to the Fundy coasts of New Brunswick and Nova Scotia.

In the absence of introduced diseases in the predominantly deciduous forests of the Appalachian region of eastern North America, forests are relatively healthy. Here, forests are disturbed significantly by disease only after they are disturbed or stressed by other agents, predominantly defoliating insects and drought. In the eastern montane coniferous forest, chronic wind damage is a major predisposing factor to disease. Past harvesting practices, introduced diseases and insects, and fire exclusion have in some instances resulted in large areas of similar species and relatively similar ages that exacerbate the magnitude and severity of disturbance by disease.

Foresters usually distinguish three types of forest fires: ground fires, which burn the humus layer of the forest floor but do not burn appreciably above the surface; surface fires, which burn forest undergrowth and surface litter; and crown fires, which advance through the tops of trees or shrubs. It is not uncommon for two or three types of fires to occur simultaneously. Forest management has been able to reduce the occurrence of this event but many forest fires are out of arm's length. Humans cause the majority of forest fires. Campers that do not put out their bond fire or campers littering lit cigarette bud are responsible for such an action. Natural occurrence such as lightning could spark a forest fire but the probability is small compared to human action. The convention way of putting out or reducing the spread of forest fire has been airliners. These airliners are filled with gallons and galloons of water. With limited capacity, these airliners fly above the flame and deposit galloons of water.

What made the ice storm so unusual, though, was that it went on for so long. On average, Ottawa and Montreal receive freezing precipitation on 12 to 17 days a year. Each episode generally lasts for only a few hours at a time, for an annual average total between 45 to 65 hours. During Ice Storm'98, it did not rain continuously, however, the number of hours of freezing rain and drizzle was in excess of 80 - again nearly double the normal annual total.

To conclude, fire and pests/disease are similar in the way these agents spread and infect their host. The preceding sentence can be best thought of as a virus infected it's host as an analogy. Fire spreads at a much faster rate than pests/disease and the impact are instant. Both of these agents have long-term effect, which does not work in our favor. Ice storm affects the area it hits and will not spread. Furthermore, ice storms are predictable whereas fire is not since the cause of fire is human mistake and is hard to predict. Ice storms are not preventable but human actions can be prevented. The potential of damage from fire is far more severe than that of ice storm. We must increase the awar

Some common words found in the essay are:
Pathogens Pests, Fire Fire, INTRODUCTION Ice, North America, Stands Depending, Trees Ice, Ice Storm'98, Eastern Ontario, Canada Jan, Environment Volume, ice storm, forest fire, ice storms, carbon dioxide, north america, freezing rain, damage caused, result ice, forest fires, freezing precipitation, canada jan 12/1998, environmental canada jan, 1998 ice storm, ice storm spread, release carbon dioxide,
Approximate Word count = 2191
Approximate Pages = 9 (250 words per page double spaced)