Greenhouse Effect & Global Warming Essay

The average global temperature has risen about 0.50C in the last century, and scientists expect another increase of 1 to 40C in the attached 100 years due to increasing pollution in our line. greenhouse Effect* babys room wastees allow the passage of influent solar short-wavelength radiation but absorb some of the reflected infrared radiation and reradiate it back to the landed estates surface.* Energy is then reradiated in the lower atmosphere make an increase in temperature and climatic change. Hence, contributing to global warming.http//www.wwnorton.com/college/chemistry/gilbert2/ contents/ch09/studyplan.aspGreenhouse ordnanceolenees1. Water (H2O)2. Carbon dioxide ( carbon dioxide)3. Methane (CH4)4. Nitrous oxide (N2O)5. CFCs6. Ozone (O3)Greenhouse Gas SourcesGreenhouse GasHuman SourcesNatural SourcesWater1.Combustion of hydrocarbons1.Evaporation of oceans and lakesCarbon dioxideBurning of-1.Fossil fuels2. tone fires3. Wood4. Waste.1.Respiration.2. decline of organic ma tter.3.Natural forest firesMethane1.Cattle farming2.R crosspatch paddies3.Petroleum4.Natural gas productionDecay of organic matter-1.Swamps2.MarshesNitrous oxide1.Use of nitrogen based fertilizers.2.Combustion of biomass.1.Bacterial ActionCFCs1.Refrigerants2.PropellantsOzone1.Secondary pollutant in photochemical substance smogsGreenhouse Gas EffectsGreenhouse gas effects depend on both their concentration (abundance) in the atmosphere and on their ability to absorb heat radiation.However, each molecule has its cause type of bond, they each absorb at slightly different frequencies and wavelengths.GasHeat trapping effectiveness compared with CO2Overall contribution to increase global warming.Water0.11%Carbon dioxide150%Methane3018%Nitrous oxide1506%CFCs200012%Ozone10,000 25,00014%1. Water= has the approximately over all contribution to global warming as it has a high concentration.2. Carbon dioxide= is the most important green house gas as contributes 50% to global warming and has second largest concentration.3. CFCs= are thousands of clock better at absorbing heat/ infrared radiation than CO2 BUT they have a lower concentration hence, their effect is express mail to 14%.Greenhouse effect is determined by* Concentration of chemical* Lifespan of chemical.* Ability to absorb infrared radiation* Intensity of submersion* Number of wavelengths absorbed depends on the molecules bonds.Atmospheric Window Region = is the arena within the spectrum through which radiation bunghole escape.ExampleMethane and CFCs have a greater greenhouse factor than CO2 and H2O because they absorb in the atmospheric window region.CFC fills this window.Methane is 30x more effective in its green house effect as it has 4 C-H bonds, which means it can absorb more at a certain frequency.Influence of Gases on Global Warming1. improver in temperature by about 0.5 degree.2. Increase in precipitation3. Rise in sea levels- melting of glaciers/ ice caps/ thermal expansion of water4. Changes in crop yields5. More impish droughts6. More floods and storms7. Changes in distribution of pathogens and insects (e.g. malaria).Influence of Particulates on Temperature1. Particulates= volcanic dust.2. It scatters and reflects incoming sunlight (UV and visible) so less solar radiation can land the atmosphere.3. It lowers atmospheric temperature as provides condensation nuclei around which water particles condense to corpse clouds reducing solar heating.4. Volcanic eruptions & forest fires- increases number of particulates.