Weather Is A Combination Of Many Conditions

Weather is the result of reaction between the Earth’s atmosphere to the Sun coupled with encounters with other random and limiting factors like the friction with land and the earth’s gravitational force.

The average of the variable weather conditions for over a long period of time is referred to as the Climate. How can the possible weather conditions of a geographical area be predicted? Average conditions of a place considered for a period of more than 30 years along with the prevalent extremities describe the climate of that area.

The description of climate of a particular place should consist of the information related to the rainfall, cloud cover, moisture, direction and speed of wind, prevalent temperatures, time of sunshine and several other factors.

Our desire is to learn the ways of predicting the possible climatic variations in the similar fashion like we wish to predict about the oncoming weather conditions. However, the time periods for climatic changes are much more compared to the time of weather changes.

Climate Zones

It has been a constant endeavor of the mankind to explore and know the world. This is no exception for climate and weather as well. With the increase in our understanding about the different patterns of weather and climate for longer time periods, we have created our unique ways of classifying and summarizing the different zones of global climate.

These climate zones are differentiated based on the Antarctic and Arctic circles, whose latitudes are 66.5 degrees south and north respectively and the Tropic of Cancer and the Tropic of Capricorn at 23.5 degrees north and south respectively.

This area in between the Tropic of Cancer and Tropic of Capricorn is known as low latitudes. The climate along this area is characterized by high humidity, heavy rains and minimal temperature variation and is known as tropical climate.

The areas within the tropics and Antarctic and Arctic circles are referred to as the middle latitudes. These areas usually experience moderate climates with four distinct seasons. This type of climate is referred to as the temperate climates that have cold winters and warm summers with a uniform rainfall.

The region between the Antarctic and Arctic circles and the poles is called the high latitudes that experience polar climates. The winters are very long and cold while the summers are a little warmer here. Snowfall is very common in the Polar climate zones.

Though the climate zones provide with a broad overview of the global weather, each zone experience some variations in the local weathers. These climate zones are further sub-classified based on maritime and continental places. The maritime places are the areas along the coasts that have a very different climate from the continental or inland places. However the sub-classifications cannot justify the variations due to the ocean currents and mountain ranges.

It is obvious that the global zones of climate vary locally to some extent. In some cases, these variations may persist for a long time and result in anomalies in the climatic conditions. Still the classifications of global zones of climate are useful in providing with an idea of the weather patterns across the globe and the expected weather for an area.



Weather Fronts Are A Factor Of Air Movement

Interaction between the Earth’s atmosphere and sun’s heat is a never-ending process and is always a constant. Every part of the atmosphere doesn’t get heated up equivalently at the same time. This in-equivalence makes the large masses of air to move about as an automatic response of the atmosphere to balance itself. The varied types of weather are a direct result of this mass movement of air.

The existing air mass in a region gets encountered that is already there when another air mass moves in. front is the boundary that is created between these two air masses. Cold front is when the cold air replaces the warm air and when cold front gets replaced, it is known as a warm front.

A cold air mass when encounters a warm front, the colder air get pushed below the warm front. Condensed water vapor changes into clouds when the warm front rises and cools down. Appearance of mid-level clouds follows high cirrus clouds. Mid-level cloud is followed by Thick stratus clouds. Precipitation and wind come next.

Often cold fronts produce weathers that are more volatile by nature. The warm air mass moves upward sharply when it comes in contact with a cold front. Convection and instability results due to this sharp upward movement. Along the front trigger storms and formation of large cumulus clouds. An area of strong winds and low-pressure zone gets created due to the quick rise in air. The actual front is accompanied by strong winds and heavy rain. After frontal passage come the persisting showers.

At times a cold front overtakes a generally slower moving warm front. The warm front gets pushed aloft the cold front when this happens. An occluded front is the line formed in-between the two fronts as they continue to move together. Light precipitation and Stratus clouds generally accompany the occluded fronts.

A stagnant area is formed when two air masses that are different but not strong enough to push and replace the other meet. Precipitation for a long time period accompanied by cloudy weather results in due to this stagnant situation. This stagnant front may as a warm or cold front begin to move or after a few days may dissipate. In summer the chances of occurrence of such stagnant fronts are higher.

More than 70% of the Earth’s surface is covered by the oceans. Land surface doesn’t cool down or heat up as quickly as the water surface and hence heat is efficiently stored in seawater. Due to this characteristic cold or warm water is carried to different parts of the globe by ocean currents. The temperature of the currents below affects the temperatures on the surface. Changes in temperatures of the sea alter climates. It affects more effectively the climate of the coastal region.

In the few weeks around the summer and winter solstices the maximum and minimum sea temperatures legs because of the slow heating and cooling nature of water. The weather is affected by the variation in sea and land temperatures that gets heightened due to this lag. As a result large portions of the water surface may experience fogs and the weather in the coastal region might be cooler.

In the air the water vapor gets condensed to form clouds that eventually as precipitation falls down on the Earth surface. The whole process starts all over again as most of it goes back to the oceans after a small portion of it gets absorbed by snow and rain.



Weather Forecast Is Done Mainly On The Basis Of Atmosphere Studies

A very common proverb that is somewhat true is, no one does anything about the weather though everyone discusses about it. In fact it is one of the most common topic that people speculate and talk about. Millions of people look over the internet to know about the local and global weather and also weather hazards. All are curious about whether umbrella is required today or whether this weekend’s big game is going to be spoiled by rain or not.

If you stay on the Earth, weather is bound to affect you in diverse ways. The kind of house you stay in, the type of clothes you were, even the type of leisure activities and games you enjoy – all are determined by the weather.

Weather influences the nature of the soil on which we live. Even plants and animals adapt to various living conditions due to weather variations. Depending on their surrounding weather, plants adapt to survive in extreme dry or wet conditions. The shapes of their branches also depend on the prevailing weather. Similarly, the animals also get acclimatized to endure the extremities of their natural habitat.

Even though we cannot ‘do’ much regarding the weather conditions, our meticulous study about the weather helps sharpen our ability to predict the approaching weather conditions. The ability to accurately foresee the oncoming adverse weather conditions help to reduce the loss to the farmers as they can modify their farming practices according to the predicted weather.

Weather conditions vary depending on the form of the atmosphere of the earth. A feature unique to the atmosphere that surrounds our world is that it contains water vapor, and a temperature that maintains this water in three different forms – solid, liquid and gas.

Technically, the day to day changes in the atmosphere conditions is referred to as the weather. Different aspects of weather like the windspeed, humidity, temperature, type and amount of precipitation etc. are measured to give us an idea of what kind of conditions we face on earth.

The sun causes these atmospheric variations and determines the condition of the atmosphere based on the location on the globe. The temperature rises up and falls down faster in land areas than oceans. The Polar Regions receive less intense radiation from the sun than the equatorial regions.

The atmosphere is a massive complex phenomenon that wants to maintain an equilibrium of its own, in the same way like every other complicated systems. The cooler regions around the poles of the earth suck in the warm air from the equatorial regions. The rotation of the earth and the friction with the land also determines the movement of air. This whole system is contained within a small area by the gravity of the earth.

Complex patterns of low and high air pressure are caused because of the combination of a variety of factors like the geography of an area, the uneven heating, balancing force of the earth to even out the irregularities, and the gravitational and rotational forces. Different weather conditions are produced as result of interaction between these low and high air pressures with the ground.