I want to know what cause heat weather since we had global warming?

Question

How does it happen?

Answer 1

Global warming is caused by something commonly referred to as the 'greenhouse effect'. In short this occurs because greenhouse gases trap heat within Earth's atmosphere causing it to warm up. The more greenhouse gases the more it warms.

Here's a more detailed explanation...

Virtually all the atmosphere is made up of just three gases - nitrogen, oxygen and argon; thgether these account for more than 99.9% of the atmosphere. There are many other gases as well that exist in small quantities.

Many of the gases, including the three primary ones, are elements - they're composed solely of atoms. The greenhouse gases are molecules (several atoms in a bunch), they're considerably larger than atoms. The main greenhouse gases are carbon dioxide, methane and nitrous oxide. These all occur naturally but human activities are increasing the levels of them.

There are also greenhouse gases that are entirely manmade. You've probably heard of CFC's (chloroflourocarbons), these are one group of manmade gases. There's also HFC's (hydroflourocarbons) and HCFC's (hydrochloroflourocarbons). These are far more damaging than the 'normal' greenhouses gases because they have a far greater Global Warming Potential - up to 31,500 times that of carbon dioixide. These gases are also responsible for the depletion of the ozone layer and have now been banned, however, they still exisit in the atmosphere.

The atmosphere surrounds our planet. From our perspective on the Earth's surface it appears that we have a thick atmosphere but viewed from space it's a very thin layer of gases.

OK, so that's the basics of the atmosphere. Next we need to look at the sun and how it heats the planet.

The sunlight and heat we receive from the sun is what we often refer to as sunrays, they're actually waves of solar radiation; these waves have a very short wavelength and pass easily through our atmosphere. They're most noticable on a clear day when the sun is shining and you can feel the heat on exposed skin.

All this heat is absorbed by Earth and when the ambient temperature drops (at noght for example) the heat is released from the Earth, rather like a giant storage heater. This heat is in the form od thermal radiation which has a longer wavelength than solar radiation. This longer wavelength radiation can easily pass through the atoms in the atmosphere but the larger molecules get in it's way and it becomes trapped.

The more of these molecules (greenhouse gases) there are the more heat become trapped in our atmosphere.

One important factor to take account of is water vapour, this is a naturally occurring greenhouse gas and the levels of it vary enormously - anywhere between 0 and 4% of the atmosphere. By comparison to the other greenhouse gases it is extremely ineffective but because there's so much of it (comparatively) it has a significant role to play in natural global warming.

Answer 2

Do you mean, What causes HOT weather?-
Right now, global warming is still in the beginning stages. It doesn't happen overnight. Maybe if you were two-hundred or so years, you might feel a difference. Also depends on where you live. A search engine like google can give you more specific info.