Ozone is formed in the stratosphere when oxygen molecules photodissociate after intaking ultraviolet photons. This converts a single O 2 into two atomic oxygen radicals. The atomic oxygen radicals then combine with separate O 2 molecules to create two O 3 molecules. These ozone molecules absorb ultraviolet UV light, following which ozone splits into a molecule of O 2 and an oxygen atom.
Check new design of our homepage! Causes and Effects of Ozone Layer Depletion That are Painfully True The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the Earth's atmosphere.
However, various factors have led to the depletion and damage of this protective layer. Learn more about the process, causes, and effects of ozone layer depletion. May 31, Formation of Ozone Ozone is a colorless gas found in the upper atmosphere of the Earth.
It is formed when oxygen molecules absorb ultraviolet photons, and undergo a chemical reaction known as photo dissociation or photolysis. In this process, a single molecule of oxygen breaks down into two oxygen atoms. The free oxygen atom Othen combines with an oxygen molecule O2and forms a molecule of ozone O3.
The ozone molecules, in turn absorb ultraviolet rays between to nm nanometers wavelength, and thereby prevent these harmful radiations from entering the Earth's atmosphere.
The process of absorption of harmful radiation occurs when ozone molecules split up into a molecule of oxygen, and an oxygen atom. The oxygen atom Orecombines with the oxygen molecule O2 to regenerate an ozone O3 molecule.
Thus, the total amount of ozone is maintained by this continuous process of destruction, and regeneration. Ultraviolet radiations UVRare high energy electromagnetic waves emitted from the Sun.
UV-C is unable to reach the Earth's surface due to stratospheric ozone's ability to absorb it. The real threat comes from UV-B, which can enter the Earth's atmosphere, and has adverse effects.
Ozone layer depletion first captured the attention of the whole world in the latter half ofand since then, a lot of research has been done to find its possible effects and causes. Various studies have been undertaken to find out possible solutions.
Let us take a look at some of the causes and effects of ozone layer depletion. A combination of low temperatures, elevated chlorine, and bromine concentrations in the upper stratosphere are responsible for the destruction of ozone.
The production and emission of chlorofluorocarbons CFCsis the leading cause of ozone layer depletion. These are often found in vehicle emissions, byproducts of industrial processes, refrigerants, and aerosols.
ODS are relatively stable in the lower atmosphere of the Earth, but in the stratosphere, they are exposed to ultraviolet radiation and thus, they break down to release a free chlorine atom.
Chlorine Monoxide ClO This free chlorine atom reacts with an ozone molecule O3and forms chlorine monoxide ClOand a molecule of oxygen. Now, ClO reacts with an ozone molecule to form a chlorine atom, and two molecules of oxygen.
The free chlorine molecule again reacts with ozone to form chlorine monoxide. The process continues, and this results in the depletion of the ozone layer.
Effects of Ozone Depletion As ozone depletes in the stratosphere, it forms a 'hole' in the layer. This hole enables harmful ultraviolet rays to enter the Earth's atmosphere. Ultraviolet rays of the Sun are associated with a number of health-related, and environmental issues.
Let us take a look at how ozone depletion affects different life forms. Impact on Humans Skin cancer: Exposure to ultraviolet rays poses an increased risk of developing several types of skin cancers, including malignant melanoma, and basal and squamous cell carcinoma.
Direct exposure to UV radiations can result in photokeratitis snow blindnessand cataracts. Effects of UV rays include impairment of the immune system.
Increased exposure to UV rays weakens the response of the immune system. Accelerated aging of skin: Constant exposure to UV radiation can cause photo allergy, which results in the outbreak of rashes in fair-skinned people.
Ozone chemicals can cause difficulty in breathing, chest pain, throat irritation, and hamper lung functioning. Effects on Amphibians Ozone depletion is listed as one of the causes for the declining numbers of amphibian species. Ozone depletion affects many species at every stage of their life cycle.
Some of the effects are mentioned below. Hampers growth and development in larvae Changes behavior and habits Causes deformities in some species Decreases immunity. Some species have become more vulnerable to diseases and death Retinal damage and blindness in some species Effects on Marine Ecosystems Plankton phytoplankton and bacterioplankton are threatened by increased UV radiation.The ozone layer diminishes more each year.
As the area of polar ozone depletion (commonly called the ozone hole) gets larger, additional . ISSUES AND CONCERNS ABOUT THE OZONE LAYER DEPLETION INTRODUCTION The ozone layer protects the Earth from the ultraviolet rays sent down by the sun.
If the ozone layer is depleted by human action, the effects on the planet could be catastrophic. The ozone layer protects the Earth against most UVB coming from the sun.
It is always important to protect oneself against UVB, even in the absence of ozone depletion, by wearing hats, sunglasses, and sunscreen. However, these precautions will become more important as ozone depletion worsens.
Now, the ozone layer is beginning to heal, but NASA experts continue to keep an eye on the interactions between what remained of CFC. Depletion of Ozone Layer essays The issue of whether the people of the world have exaggerated the threat of the ozone depletion has been widely debated.
It is an important issue because it concerns health and well being now and tomorrow. The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains high concentrations of ozone (O 3) in relation to other parts of the atmosphere, although still small in relation to other gases in .