What Does Ozone Depletion Potential or Odp Measure

The ability of a substance to destroy ozone in the stratosphere c. Ozone layer depletion occurs due to unique sets of climatic conditions.

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The rating of health hazards caused by ozone depletion d.

. ODP can be estimated from the molecular structure of a given substance. If the ozone layer gets depleted more UV rays enter the atmosphere. HCFC-141b has an ODP of 01110 times less degrading than CFC-11.

In the summer nitrogen dioxide and methane react with chlorine monoxide and chlorine atoms which result in a shrinkage of chlorine and hence prevents ozone layer. One chlorine can destroy 100000 molecules of ozone. 65 rows zone Depletion Potential A number that refers to the amount of ozone.

Section 604 of the Clean Air Act establishes the phaseout targets for Class I ODS. It is measured as a factor relative to CO 2. Ozone Depletion Potential ODP is the ratio of the ability of a substance to degrade ozone to that of chlorofluorocarbon-11 CFC-11.

Ozone depleting potential ODP is a relative index of the ability of a substance to cause ozone depletion. The reference level of 1 is assigned as an index to CFC-11 and CFC-12. Ozone Layer Depletion Effect on Human Beings.

Ozone depleting potential is a measure of how much damage a chemical can cause to the ozone layer compared with a similar mass of trichlorofluoromethane CFC-11. More specifically it is defined as the ratio of calculated ozone column change for each mass unit of a gas emitted into the atmosphere relative to the calculated depletion. Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere.

A global semi-empirical ozone depletion potential may be defined Solomon et al 1992 as. The higher the number the more damage a chemical can cause to. It is destroyed more quickly than it is created.

For each ODS this page provides the compounds atmospheric lifetime O zone Depletion Potential ozone depletion potential A number that refers to the amount of ozone depletion caused by a substance. The ozone depletion potential ODP of a compound is a simple measure of its ability to destroy stratospheric ozone. What does ozone depletion potential or ODP measure.

Chlorofluorocarbons have ODPs roughly equal to. The Ozone Depletion Potential ODP is used to contrast different gases and provides a simple measure of the expected impact on ozone per unit mass emission of a gas relative to that caused by CFC-11 defined as 1. In the year 1980 scientists reported the depletion of ozone layer in the region of Antarctica which is commonly known as the ozone hole.

Ozone Depletion Potentials ODPs provide a rel ative measure of the expected impact on ozone per unit mass emission of a gas as compared to that expected from the same mass emission of CFC-11 integrated over time Wuebbles 1983. Conecioue of the potential climatic effecta of emi11ion1 of the1e 1ubatance1 Aware that meaeures taken to protect the ozone layer from depletion ahould be baaed on relevant ecientific knowledge taking into account teclmical and economic conaiderationa Deterained to protect the ozone layer by taking precautionary aea1ure1 to. The ODP of CFC-11 is defined to be 10 and the ODPs of other compounds are calculated with respect to this reference point.

Table of halogen source gas names chemical formulas surface emissions lifetimes ODP and other names by which they are. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. When these UV rays come in contact with the human skin it can cause malignant skin cancers.

Class I ODS have an ozone depletion potential of 02 or higher and include halons chlorofluorocarbons CFCs methyl chloroform carbon tetrachloride and methyl bromide. The rating of health hazards caused by ozone depletion d. ODP is calculated with respect to CFC-11 CFC-11 has an ODP of 1.

Some of the negative impacts of ozone depletion are. Larger values indicate more potential to deplete ozone. The ability of a substance to cause global warming b.

ODP is the ratio of ability of a substance to degrade ozone to that of chlorofluorocarbon-11 CFC-11 which therefore has a value of 1. The ODP is the ratio of the impact on ozone of a chemical compared to the impact of a similar mass of CFC-11. The contribution of individual compounds to ozone depletion is characterized by the ozone depletion potential ODP.

The ability of a substance to destroy ozone in the stratosphere c. Up to 1000 times less degrading than CFC-11 which has a value of 10 whilst other substances such as Pentane have an ODP of zero ie. Ozone depletion potential ODP The ozone depletion potential ODP of a chemical compound is the relative amount of degradation to the ozone layer it can cause with trichlorofluoromethane CFC-11 being fixed at an ODP of 10.

It is a relative measure. The ozone depletion potential ODP is a measure of the potential of a compound to destroy ozone. Ozone Depletion Potentials.

CFC-11 with an ozone depleting potential of 10 is used as the base figure for measuring ozone depleting potential. The ability of a substance to cause global warming b. Scientific Assessment of Ozone Depletion.

A relative measure of the warming effect that the emission of a gas might have on the surface troposphere. Where O3 z t is the estimated decrease in ozone concentration observed in todays atmosphere at each altitude latitude and time of year see Solomon et al 1992 for details of the ozone loss distribution imposed. Ozone Depletion Potential ODP has traditionally been defined as the ratio of model calculated ozone depletions under steady state conditions.

Ozone Depletion Measurements of Different Products HCFCs are thought to be between 0001 and 011 ie. What does ozone depletion potential or ODP measure. Class II ODS are subject to a different phaseout schedule.

There are two types of cancers. A measure of the capability of a particular chemical to destroy ozone measured against CFC-11 which has an ozone-depleting potential of 1. The ODP of a compound as normally defined is the ratio of the global loss of ozone ie integrated over latitude altitude and time from that compound at steady state per unit mass emitted relative to the loss of ozone.

This is the process of ozone depletion and has already caused a substantial amount of damage to the ozone layer. 2018 Table A-1 and United States Environmental Protection Agency.

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