0
Quick answer: it changes because the seasons change, because the amount of contaminants in the air that deplete ozone varies, and because the Sun goes through an 11-year cycle that also affects ozone production.
The ozone layer is the result of UV-C breaking apart oxygen molecules in the atmopshere, some of which end up forming ozone. Ozone then absorbs UV-B and more energetic light, and breaks apart (some percentage of which reforms as ozone). Ozone also decays just with time, and with certain contaminants that add new decay paths. Additionally, some contaminants help to block ozone production, which amounts to almost the same thing as depletion.
The amount of ozone along any vertical path then is a balance of ozone being made, and being destroyed. If it is destroyed by sunlight, that sunlight did not hit Earth. If it was destroyed by sunlight, somewhere more ozone was made.
Ozone holes form when the pole that is having winter stops receiving UV-C from the Sun. The ozone over the pole decays (both time and contaminant driven), and only diffusion from adjacent areas provides ozone there. The size of the hole varies with contaminants. So there is a very significant seasonal variation, based on how much UV-C is striking each vertical column of atmosphere.
Finally, the Sun has been observed to go through an 11-year cycle where its output of radiation in different energy bands varies. This signal is present in the light that reaches Earth's surface, and in the light that forms ozone in the upper atmosphere. Even if the amount OS atmospheric ozone did not vary, the intensity of UV-B detected at Earth's surface would vary.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoThe ozone layer may very slightly be thickening. All developed countries have stopped using chlorofluorocarbons (CFCs) and many developing countries are stopping. CFCs cause the greatest damage to the ozone layer. It is hoped that the ozone level may be completely recovered by 2050, so we should see some signs soon that this is happening. In January 2011 the ozone layer over Sweden was thicker that it has been since 1991, so this is a good sign.
Wiki User
∙ 10y agoThe CFc's present in the atmosphere deplete ozone. Which makes the ozone layer thinner.
Wiki User
∙ 9y agoThe ozone layer depletes over time. It is due the man made CFC's.
Wiki User
∙ 9y agoOzone depletion make it thinner. It is because of CFC's.
Anonymous
((
Add your answer:
Earn +20 pts
When was the massive hole in the ozone layer over the Antarctica first discovered?
The ozone hole first appeared when the ozone layer first appeared. The only variable is the "size" of the hole, and the ozone concentration in the "hole". The pole of the Earth that is experiencing winter receives none of the UV that makes ozone (for like a month or more), and ozone naturally decays with time. TThe ozone hole is a normal feature of our ozone layer. It appears each year when it is winter at one of our poles. So it first appeared when the ozone layer appeared. We first noticed the ozone hole in 1985, above Antartica. One forms over the Arctic pole too when it is winter there. They heal closed again once sunlight reaches the pole. Its not so much the presence or absence of an ozone hole, but its size that is important. It is important to look out for the ozone hole
Which blocks are harmful ultraviolet rays from the Sun?
The ozone layer blocks most of the sun's harmful ultraviolet rays. The ozone layer has thinned over time in certain areas due to emissions of ozone depleting chemicals widely used in industry.
How has the ozone layer changed over time?
It was nonexistent before there was significant oxygen in the atmosphere. After the Great Oxidation Event, we developed our ozone layer, complete with annual ozone "holes" at each pole. We have evidence of sporadic events punching holes in the ozone layer from time-to-time. Since the 1700s, the ozone layer has been getting steadily thinner. This gets us to "current events".
How much of the ozone layer do you have right now?
The "ozone layer" is roughly the same condition it has always been in. The amount of ozone in the upper atmosphere varies mainly due to variations in solar activity. UV radiation has serious affects on this layer. Holes form over the poles at the end of each winter due to a lack of sunlight. When the sun returns, the "holes" quickly disappear.
What layer is the ozone a part of?
You can find ozone in any layer of the atmosphere, but in the lower layers it does not last long. The so-called ozone layer is in the lower portion of the stratosphere, at a height where it takes a long time to dissociate.
Has the ozone layer shifted over time?
Yes, the ozone has shifted over time. It changes with weather each season.
How did the aerosol can change over time?
They use hydrocarbons now; they used to use chlorofluorocarbons (CFC's) which were damaging to the ozone layer.
Is the ozone hole constant over the time?
No the ozone hole is not constant over the time
What is causing the ozone layer to change?
The amount of ozone in a space is a balance of net producers of ozone, net reducers of ozone, and time (ozone decays on its own...).So the ozone layer changes with temperature, time and season. For example, the ozone hole is an annual phenomenon at each pole. Only the size and duration of the hole may be due to Man's actions.
How do alternative fuels affect the ozone layer?
The main damage to the ozone layer was caused by freons, with the layer thinning to such an extent over Antarctica that it was referred to as the'ozone hole'. Fortunately, the industrial use of freons was banned, perhaps just in time, and the ozone layer is recovering. Alternative fuels are unlikely to affect this recovery.
When was the massive hole in the ozone layer over the Antarctica first discovered?
The ozone hole first appeared when the ozone layer first appeared. The only variable is the "size" of the hole, and the ozone concentration in the "hole". The pole of the Earth that is experiencing winter receives none of the UV that makes ozone (for like a month or more), and ozone naturally decays with time. TThe ozone hole is a normal feature of our ozone layer. It appears each year when it is winter at one of our poles. So it first appeared when the ozone layer appeared. We first noticed the ozone hole in 1985, above Antartica. One forms over the Arctic pole too when it is winter there. They heal closed again once sunlight reaches the pole. Its not so much the presence or absence of an ozone hole, but its size that is important. It is important to look out for the ozone hole
How ozone layer recover in summer in south poles?
Ozone layer forms in summer. therefore it initiates its recovery at that time.
Which blocks are harmful ultraviolet rays from the Sun?
The ozone layer blocks most of the sun's harmful ultraviolet rays. The ozone layer has thinned over time in certain areas due to emissions of ozone depleting chemicals widely used in industry.
How has the ozone layer changed over time?
It was nonexistent before there was significant oxygen in the atmosphere. After the Great Oxidation Event, we developed our ozone layer, complete with annual ozone "holes" at each pole. We have evidence of sporadic events punching holes in the ozone layer from time-to-time. Since the 1700s, the ozone layer has been getting steadily thinner. This gets us to "current events".
How much of the ozone layer do you have right now?
The "ozone layer" is roughly the same condition it has always been in. The amount of ozone in the upper atmosphere varies mainly due to variations in solar activity. UV radiation has serious affects on this layer. Holes form over the poles at the end of each winter due to a lack of sunlight. When the sun returns, the "holes" quickly disappear.
Will you die when the ozone layer breaks?
Yes, you will. There is a lot of time until the ozone breaks up.
What layer is the ozone a part of?
You can find ozone in any layer of the atmosphere, but in the lower layers it does not last long. The so-called ozone layer is in the lower portion of the stratosphere, at a height where it takes a long time to dissociate.
