Clouds reflect light
The atmosphere has an influence on the light
As we learned in the first lesson on the topic 'Lower Atmosphere', air consists of different gases. In addition, particles float in the air, small particles that we also call aerosols. Last but not least, there is a lot of water in the air, which sometimes forms small droplets and turns into clouds.
Energy is in balance
When sunlight reaches the earth, it warms up. The water of the oceans gets warmer in summer. Roads can even heat up so much that they get too hot to walk on with bare feet. The warm earth also emits energy again, back into space. But this radiation is different from that which comes from the sun. Sunlight is visible or ultraviolet light. The radiation emitted by the earth is not visible. We call it infrared light or long-wave radiation, also known as thermal radiation. It has less energy than sunlight.
If the earth did not send back radiation as well, all energy coming from the sun would accumulate and the earth would become hotter and hotter. But this is not the case. Energy is in balance. This means: The earth gives back what it received.
2. What happens to the radiation? We explain it in ten points.
A flash animation shows the process step by step. Developed and made available by: Florian Thierfeldt.
What happens when radiation passes through the atmosphere?
First, let's look at what happens to sunlight:
The part of the sunlight that reaches the earth warms its surface. The earth sends back long wave rays. We now want to see what happens to this thermal radiation.
(6) The surface of the earth warmed up by solar radiation is a source of thermal radiation (long-wave infrared radiation).
All of these interactions between light and atmosphere take place in our climate system and we have to take them into account in order to understand it. But why are we talking about a greenhouse effect?
3. The greenhouse effect - compare the interaction with light in a greenhouse and on earth!
The role of greenhouse gases in the atmosphere can be compared to the glass in a greenhouse. The glass lets in the sunlight and the light warms the soil and plants in the greenhouse. These in turn emit thermal radiation. If this reaches the glass, however, it cannot penetrate like sunlight, but the glass * sends part of the radiation back into the greenhouse, in which it becomes warm. This is exactly what the greenhouse gases in the atmosphere do: They let the sunlight in, but the heat radiation of the earth no longer out.
* We have to note here that glass is a solid and therefore also a barrier for warm air currents. This is not so in the atmosphere, so the greenhouse is not a perfect model.
Response of the atmosphere to increased greenhouse effects
If the greenhouse effect is increased by an increase in greenhouse gases, then the climate adapts to it. The mean temperatures close to the ground increase compared to a natural, undisturbed system such as we had before the industrial age. In the stratosphere, however, the temperature drops.
About this page:
scientific reviewer: Dr. Pascal Guyon - MPI for Chemistry, Mainz
educational reviewer: Roland Bergmann + students, Velbert comprehensive school
Last revised: 2007-08-20
- What are the London Underground Zones
- Well worth buying PS2 in 2018
- Are you a designer yourself
- What is Queen Elizabeth's weakness
- Who is also known as Lambodar
- What did Dusty Springfield die of
- Are ISKCON hostels good
- Are computers better at thinking than humans?
- What is style in street photography
- How do you overwinter water lilies
- How can I write properly
- How profitable are large airports
- Who was Conrad Celtes
- Has taken over Volkswagen Ferrari
- Can turkeys see color in real life
- Why does the hardness decrease after tempering
- Is cholangiocarcinoma genetic
- Why do you sing off the key
- Requires ISRO M Tech engineers
- What's your favorite director's worst movie
- How Do I Get Prescribed Addium
- How is PVA different from polyester
- Which river flows through five countries
- What happens if I overdose on Seroquel
- What is CBG cannabinoid
- Have we observed quantum fields
- There is no 2G network in Japan
- Breast Cancer What is Tamoxifen Citrate
- Why is number seven so special
- Feel bad for abused sociopaths
- Which country is the enemy of Belgium
- When did the Darknet start?
- Which river flows through five countries
- The whole truth is final