Weather Essay: Weather is the state of the atmosphere, to the degree that it is hot or cold, wet or dry, calm or stormy, clear or cloudy. A moment’s view of the atmosphere is considered weather. Weather refers to day-to-day temperature and precipitation activity, whereas climate is the term for the statistics of atmospheric conditions over longer periods of time.
Weather Essay: Precipitation
Precipitation is any form of water particles as in rain, sleet, snow or hail, that fall from the atmosphere to the earth’s surface. When heat from the lower air spreads through a larger volume, the mass of air becomes cooler. Cool air is less able to hold water vapor than warm air. Causes of weather changes that occur as hair from high-pressure zones flows toward low pressure areas, fronts pass and waves develop, dew points are reached, and sea breezes arise. Parts of the world experience these changes more rapidly and more often than do other parts.
Venture outside and you encounter numerous features of weather. Moistness, air temperature and pressure, wind pace and direction, overcast cover and sort, and the sum and type of precipitation are all environmental qualities of the momentary conditions we call weather.
The sun is at last in charge of the weather. Its beams are absorbed diversely by land and water surfaces (meet measures of sunlight based radiation warm the ground more rapidly than they do water). Differential warming, as a result, causes changes in the temperature and weight of overlying air masses.
As an air mass warms, it becomes lighter and rises higher into the atmosphere. As an air mass cools, it becomes heavier and sinks. Pressure differences between masses of air generate winds, which tend to blow from high-pressure areas to areas of low pressure. Fast-moving, upper atmosphere winds known as jet streams help move weather systems around the world.
Weather Essay: Cyclone Rotate Counter-Clockwise
Large weather systems called cyclones rotate counter-clockwise in the Northern Hemisphere (clockwise in the Southern Hemisphere); they are also called “lows,” because their centres are low-pressure areas. Clouds and precipitation are usually associated with these systems. Anticyclones, or “highs,” rotate in the opposite direction and are high-pressure areas – usually bringing clearer skies and more settled weather.
The boundary between two air masses is called a weather front. Here, wind, temperature, and humidity change abruptly, producing atmospheric instability. When things get “out of balance” in the atmosphere, storms develop, bringing rain or snow and sometimes thunder and lightning too.
The weather you experience is influenced by many factors, including your location’s latitude, elevation, and proximity to water bodies. Even the degree of urban development, which creates “heat islands,” and the amount of snow cover, which chills an overlying air mass, play important roles.
The next time you watch a weather report on television, think about the many factors that influence our weather, some thousands of miles away, that help make the weather what it is.
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