'Greenhouse Effect & Global Warming Essay\r'

'The average global temperature has risen somewhat 0.50C in the last century, and scientists expect some other increase of 1 to 40C in the conterminous 100 years due to increase pollution in our atmosphere.\r\n green domicile deed:\r\n* glasshouse gases allow the passage of inward solar short-wavelength shaft but occupy some of the reflected infrared beam and reradiate it abide to the Earth’s surface.\r\n* Energy is and then reradiated in the lower atmosphere make an increase in temperature and climatic change. Hence, bestow to global warming.\r\nhttp://www.wwnorton.com/college/chemistry/gilbert2/contents/ch09/studyplan.asp\r\nGreenhouse Gases:\r\n1. wet (H2O)\r\n2. Carbon dioxide ( carbon dioxide)\r\n3. Methane (CH4)\r\n4. Nitrous oxide (N2O)\r\n5. CFCs\r\n6. Ozone (O3)\r\nGreenhouse Gas Sources:\r\nGreenhouse Gas\r\n charitable Sources\r\nNatural Sources\r\n piss supply\r\n1.Combustion of hydrocarbons\r\n1.Evaporation of oceans and lakes\r\nCarbon dioxide\r\n animated of-\r\n1.Fossil fuels\r\n2. Forest fires\r\n3. Wood\r\n4. Waste.\r\n1.Respiration.\r\n2. collapse of organic matter.\r\n3.Natural afforest fires\r\nMethane\r\n1.Cattle farming\r\n2.Rice paddies\r\n3.Petroleum\r\n4.Natural gas production\r\nDecay of organic matter-\r\n1.Swamps\r\n2.Marshes\r\nNitrous oxide\r\n1.Use of nitrogen base fertilizers.\r\n2.Combustion of biomass.\r\n1.Bacterial Action\r\nCFCs\r\n1.Refrigerants\r\n2.Propellants\r\nOzone\r\n1.Secondary pollutant in photochemical smogginess’s\r\nGreenhouse Gas effectuate:\r\nGreenhouse gas effects reckon on both their concentration (abundance) in the atmosphere and on their ability to quarter heat light beam.\r\nHowever, each molecule has its testify type of bond, they each absorb at slightly different frequencies and wavelengths.\r\nGas\r\n lovingness trapping effectiveness compared with CO2\r\n overall function to increased global warming.\r\nWater\r\n0.1\r\n>1%\r\nCarbon dioxide\r\n1\r\n50%\r\nMeth ane\r\n30\r\n18%\r\nNitrous oxide\r\ncl\r\n6%\r\nCFCs\r\n2000\r\n12%\r\nOzone\r\n10,000 †25,000\r\n14%\r\n1. Water= has the most over all contribution to global warming as it has a high concentration.\r\n2. Carbon dioxide= is the most significant green house gas as contributes 50% to global warming and has here and now largest concentration.\r\n3. CFCs= are thousands of times better at absorbing heat/ infrared radiation than CO2 †BUT they have a lower concentration; hence, their effect is particular to 14%.\r\nGreenhouse effect is contumacious by:\r\n* Concentration of chemical\r\n* living of chemical.\r\n* Ability to absorb infrared radiation\r\n* Intensity of absorption\r\n* Number of wavelengths thoughtless depends on the molecules bonds.\r\n‘Atmospheric Window neck of the woods’ = is the region within the spectrum through which radiation can escape.\r\nExample:\r\nMethane and CFCs have a greater greenhouse factor than CO2 and H2O because they absorb in the ‘ atmospherical window region’.\r\nCFC fills this window.\r\nMethane is 30x much effective in its green house effect as it has 4 C-H bonds, which mode it can absorb more at a certain frequency.\r\nInfluence of Gases on Global Warming:\r\n1. Increase in temperature by about 0.5 degree.\r\n2. Increase in precipitation\r\n3. Rise in sea levels- melting of glaciers/ ice caps/ thermal intricacy of water\r\n4. Changes in crop yields\r\n5. more severe droughts\r\n6. More floods and storms\r\n7. Changes in statistical distribution of pathogens and insects (e.g. malaria).\r\nInfluence of Particulates on Temperature:\r\n1. Particulates= volcanic dust.\r\n2. It scatters and reflects submission sunlight (UV and visible) so less solar radiation can enter the atmosphere.\r\n3. It lowers atmospheric temperature as provides condensation nuclei around which water particles condense to form clouds reducing solar heating.\r\n4. Volcanic eruptions & forest fires- increase s subdue of particulates.\r\n'