Greenhouse Effect: Earth's Blankie

Greenhouse Effect: Earth's Blankie

Greenhouse Effect: Earths Blanket What is a greenhouse? Wikipedia | GNU Smithsonia n Greenhouse Effect Process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions What gets in and what is blocked? 2011 The Pennsylvania State University

Albedo Reflecting power of a surface Ratio of reflected radiation from the surface to incident radiation upon it No units 0.3 is the global average albedo Why are urban areas warmer than rural areas? Surface Albedo

Fresh Asphalt 0.04 Worn Asphalt 0.12 Conifer forest (Summer) 0.08 - 0.15 Deciduous trees 0.15 - 0.18 Bare soil

0.17 Green grass 0.25 Desert sand 0.4 New concrete 0.55 Ocean ice 0.5 - 0.7 Fresh snow

0.80 - 0.90 Earths Energy Budget NOAA|NWS Greenhouse Gas (GHG) Gas in an atmosphere that absorbs and emits radiation within the thermal infrared range GHGs in Earths atmosphere in order of abundance Water Vapor (H2O) Carbon Dioxide (CO2) Methane (CH4) Nitrous Oxide (N2O)

Ozone (O3) NASA GHG Concentration Depends on rates of emission and rates of removal If emissions increase with time, atmospheric concentration will increase with time, regardless of the atmospheric lifespan of the gas Water Vapor - H2O Natural Source Evaporation of water Sublimation of ice Plant and animal respiration

Anthropogeni Evaporation and transpiration losses from c source watering lawns Lifespan 9 days in the atmosphere Location Troposphere Does it do us any good? Supports life Triggers convection currents Leads to cloud formation Carbon Dioxide - CO2

Natural Source Animal and plant respiration Ocean-atmosphere exchange Photosynthesis (sink) Anthropogeni c source Fossil fuel combustion Deforestation (lack of sink) Lifespan More than half is removed within a century A small fraction (20%) can remain in the atmosphere for many millenia Location

Troposphere Does it do us any good? Photosynthesis Methane - CH4 Natural Source Wetlands Termites Anthropoge Raising ruminant animals (cattle) nic source Energy production from coal and natural gas Rice agriculture Biomass burning

Lifespan 12 years Removed by chemical processes in the atmosphere Location Troposphere Stratosphere Does it do us any good? Helps regulate temperature Nitrous Oxide - N2O Natural Source

Oceans Chemical oxidation of ammonia in the atmosphere Soils Anthropogen Transformation of fertilizer nitrogen into N2O and ic source its subsequent emission from agricultural soils Biomass burning Raising cattle Lifespan 110 years Destroyed in the stratosphere by solar radiation Location Troposphere Stratosphere

Does it do us any good? Helps regulate temperature Ozone - O3 Natural Source Formed when O2 molecule photodissociates after absorbing an IR photon Free O molecule bonds with O2 to form O3 Anthropogenic source Chlorofluorocarbons (CFCs) contain molecules which can destroy ozone in the stratosphere Tropospheric ozone formed from reactions with carbon

monixide, methane, and other volitile organic compounds Tropospheric ozone is found in smog Lifespan Tropospheric ozone (a few days) Stratosphere long lived due to the oxygen-ozone cycle Location Stratosphere (Ozone Layer) Troposphere (harmful) Mesosphere Does it do us any good? Stratospheric ozone protects us from 97-99% of the suns UV radiation

Some GHG Concentration Trends NOAA | accessed via Wikipedia What if there were no GHGs? Would Earth be very hot or very cold? WHY? VS. Would the air be very dry or very wet? Goldilocks Principle Venus Too Hot Extremely dense

atmosphere High concentration of CO2 High surface temperature of 464C NASA | Image processing by R. Nunes Mars .. Too Cold Almost no atmosphere Low concentration of CO2 Wide temperature

range of -135C to 30C NASA | accessed via Wikipedia Earth Just Right Perfect atmosphere to sustain life Correct concentration of GHGs Temperature range of 10C to 20C NASA | accessed via Wikipedia

Click icon to add picture NASA | accessed via Wikipedia Global Warming? Why do we use the term Global Warming? 20002009 was the warmest decade on record worldwide

Recently Viewed Presentations

  • PowerPoint - The Business of Travel and Tourism

    PowerPoint - The Business of Travel and Tourism

    Travel and Tourism Interactions. Guests use businesses from both sectors when traveling. Employees must work together to meet customer needs. Goal is to make travel fun, safe and exciting. 6. Employees from both the travel and tourism industries must interact...
  • SEMESTER III - cujammu.ac.in

    SEMESTER III - cujammu.ac.in

    HISTORY OF AMERICAN LITERATURE II. Exploration Period, 1492-1607CharacteristicsThe first European writings about North America are written in this period.European writings describe the explorers' travels and impressions of the continent and its Native people.Major Writers or WorksProse:Christopher Columbus, AlvarNuñezCabeza de Vaca,...
  • G.R.A.P.E.S. The big ideas of social studies a

    G.R.A.P.E.S. The big ideas of social studies a

    GRAPES QUIZ #4 Man becomes homeless; he cannot afford to pay rent or by a house. GRAPES QUIZ #5 Barack Obama is the first African-American President of the USA GRAPES QUIZ #6 The new iPhone has 5GB of free space,...
  • Chapter 1: Exploring Categorical Data

    Chapter 1: Exploring Categorical Data

    In the 2008-2009 NHL regular season, Sidney Crosby made 33 of 238 shots on goal (13.9%). During the playoffs that season, he made 15 of 79 shots (19.0%). His . PERFORMANCE, as measured by goal percentage, was definitely better in...
  • Power Division Ministry of Power, Energy & Mineral Resources

    Power Division Ministry of Power, Energy & Mineral Resources

    BUS 525: Managerial Economics Lecture 10 Game Theory: Inside Oligopoly * * * * * * * * * * B is an existing firm; A potential entrant A stays out B earns 10 million, A zero A decides to...
  • Writer's Eye (I) - Weebly

    Writer's Eye (I) - Weebly

    Writer's Eye (I) Serves two purposes: You will write about the life you observed with your own eyes, writer's eyes. You will start a collecting of the people, places, games, hobbies, interests, and so forth that you know well.
  • Our 50 States: [Name of Your State] - Lakewood High School

    Our 50 States: [Name of Your State] - Lakewood High School

    Over time, many more words were introduced into English from other European countries. * * We should also mention that Latin was the language of churchmen and of the services of the Church from the ninth century to the sixteenth...
  • G063 - Satellite phones Learning Objectives: At the

    G063 - Satellite phones Learning Objectives: At the

    G063 - Satellite 'phones Learning Objectives: At the end of this topic you should be able to: describe satellite 'phone communications, describe the advantages and disadvantages of satellite 'phone systems Examination question: Examination question: How does a Satellite 'Phone work?...