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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.
What else can I help you with?
Does lightning repair the ozone?
No, lightning does not repair the ozone layer. Lightning can actually contribute to the depletion of ozone by producing nitrogen oxides, which are ozone-depleting substances. The ozone layer is repaired naturally through complex chemical processes over time.
What happens when a meteor hits the ozone layer?
When a meteor hits the ozone layer, it can cause localized heating and disruption of the ozone molecules. This can lead to a temporary thinning of the ozone layer in that specific area, which may allow more harmful UV radiation to reach the Earth's surface. Over time, the ozone layer can repair itself and return to its normal state.
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
Does a thick unchanging layer of the ozone cover the entire earth?
No, the ozone layer is not a single thick layer covering the entire Earth. Instead, it is a region of the stratosphere that contains higher concentrations of ozone gas. The thickness and concentration of this ozone layer vary depending on factors such as location and time of year.
Can the ozone layer repair itself if you reduce green house gases?
Probably.The ozone layer is constantly repairing itself. When ozone absorbs energetic radiation, it breaks down. Only a few greenhouse gases affect the average concentration of ozone. The biggest one is water vapor.
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.
Does lightning repair the ozone?
No, lightning does not repair the ozone layer. Lightning can actually contribute to the depletion of ozone by producing nitrogen oxides, which are ozone-depleting substances. The ozone layer is repaired naturally through complex chemical processes over time.
What happens when a meteor hits the ozone layer?
When a meteor hits the ozone layer, it can cause localized heating and disruption of the ozone molecules. This can lead to a temporary thinning of the ozone layer in that specific area, which may allow more harmful UV radiation to reach the Earth's surface. Over time, the ozone layer can repair itself and return to its normal state.
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.
How ozone layer recover in summer in south poles?
Ozone layer forms in summer. therefore it initiates its recovery at that time.
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
Does a thick unchanging layer of the ozone cover the entire earth?
No, the ozone layer is not a single thick layer covering the entire Earth. Instead, it is a region of the stratosphere that contains higher concentrations of ozone gas. The thickness and concentration of this ozone layer vary depending on factors such as location and time of year.
Can the ozone layer repair itself if you reduce green house gases?
Probably.The ozone layer is constantly repairing itself. When ozone absorbs energetic radiation, it breaks down. Only a few greenhouse gases affect the average concentration of ozone. The biggest one is water vapor.
How do scientist believe that a ozone layer formed and what does it allow for?
Scientists believe that the ozone layer formed through the accumulation of oxygen molecules in the Earth's atmosphere over time. The ozone layer absorbs and filters out a large portion of the sun's harmful ultraviolet (UV) radiation, providing crucial protection for life on Earth.
