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Earth's weather is driven by the sun. Solar energy, sunlight, heats the earth, but it does not heat it evenly. Additionally, the earth radiates heat away differentially. The dynamic processes involved leave air masses on Earth with differences in temperature, and, therefore, differences in density. We know that warmer air rises, and cooler air pushes in underneath it. If we factor in the Coriolis forces operating around the planet, we get a mix of constantly moving air. In addition to all of this, consider that the planet is largely covered in water. With the evaporation of this water and the addition of atmospheric moisture into the equation, we arrive at a situation where atmospheric conditions are in constant flux and precipitation in many forms is involved. Predicting changes in weather is a challenge, particularly in the long term. The moisture or water cycle is a part of the weather cycle. Lest we forget, let's throw in the change of axial alignment (referenced to the orbital plane) and we get the changes of the seasons. We already assume that the dramatic changes in the warming and cooling between day and night are understood. In general, energy absorption and warming happen in the day, and re-radiation and cooling happen at night. This is a simplified explanation of the basic mechanism that drives weather and climate. There are whole books on just portions of this subject, and whole college courses on fractions of the larger whole. Atmospheric sciences and meteorology have flocks of PhD candidates vying for graduate school acceptance, and these bright people are eager to learn more about this broad science and to push out its boundaries.

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8y ago
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14y ago

The rotation of the Earth, combined with the 23° tilt of its axis, means that heating and cooling occurs in different amounts on different areas of the planet. Further, land areas heat up and cool down faster than the seas do.

Warm water tries to mix with cold water, creating currents; while warm air rises and picks up moisture, creating storms. The result is weather.

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8y ago

wind clouds and precipitation is the cause of weather systems on earth

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Q: What is the cause of weather systems on earth?
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What is the primary cause of changes in the earth's weather?

The primary cause in change to the Earth's weather is variation in solar energy received by the Earth's regions.


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