Chapter 17 Air resources The atmosphere layer is very thin compared to the size of the earth
Chapter 17 Air resources • The atmosphere layer is very thin compared to the size of the Earth
17.1 The Earth's atmosphere is a mixture of gases Our atmosphere is a result of actions of both heat and gravity ※:※ (a) Atmosphere with gravity but no(a) Atmosphere with solar heat but (a)Atmosphere with solar heat and solar heat molecules lie on the no gravity: molecules escape into gravity: molecules reach high earth' s surface outer space altitudes but are prevented from escaping into outer space Fig 17. 1 our atmosphere is a result of the actions of both solar heat and gravity
17.1 The Earth’s atmosphere is a mixture of gases. Our atmosphere is a result of actions of both heat and gravity (a) Atmosphere with gravity but no solar heat: molecules lie on the earth’s surface (a) Atmosphere with solar heat but no gravity : molecules escape into outer space (a) Atmosphere with solar heat and gravity : molecules reach high altitudes but are prevented from escaping into outer space Fig 17.1 our atmosphere is a result of the actions of both solar heat and gravity
Atmosphere is divided into layers Ionosphere 350km Mesosphere 90 km Fig 17.2 the two ozone Laye 50 km stratosphere lowest atmospheric tropopause layers-troposphere and stratosphere Troposphere 18 km 14 km Earth
Atmosphere is divided into layers. Fig 17.2 the two lowest atmospheric layers-troposphere and stratosphere
17.2 Human activities have increased air pollution Volcano Fig 17. 3 the cloud of sulfur dioxide generated by the June 15, 1991 eruption of Mount Pinatubo reached India in four days. (the black strips are where satellite data are missing ) by July 27, the sulfur dioxide cloud had traveled around the globe
17.2 Human activities have increased air pollution • Volcano Fig 17.3 the cloud of sulfur dioxide generated by the June 15,1991, eruption of Mount Pinatubo reached India in four days. (the black strips are where satellite data are missing.) by July 27, the sulfur dioxide cloud had traveled around the globe
Aeros(烟、雾、气凝胶) and particulates facilitate chemical reactions involving pollutants Aerosol O CO H2CO3 . NO Solid particle <001mm/Hydrocarbons Hydrocarbons No+ O2 Aldehydes, NO H2SO4←502 Aldehydes ketones SO Fig 17.4(a)micrograph of aerosols in the atmosphere. (b)an aerosol is the site of many chemical reactions involving pollutants. Water surrounding the solid particle attracts airborne molecules that them readily react in aqueous solution before being released back into the atmosphere
Aerosol (烟、雾、气凝胶) and particulates facilitate chemical reactions involving pollutants Aerosol Fig 17.4 (a) micrograph of aerosols in the atmosphere. (b) an aerosol is the site of many chemical reactions involving pollutants. Water surrounding the solid particle attracts airborne molecules that them readily react in aqueous solution before being released back into the atmosphere