1 / 19

Discussion 3

Discussion 3. Wednesday 2/13 Quiz review + lectures 4-6. Quiz m ultiple choice. Most common gas?. Closest to the Earth?. Thermosphere Mesopause Mesosphere Stratopause Stratosphere Tropopause Troposphere Earth. O 2 Ar N 2 CO 2 He. Quiz m ultiple choice. Stratospheric warming?.

ace
Download Presentation

Discussion 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Discussion 3 Wednesday 2/13 Quiz review + lectures 4-6

  2. Quiz multiple choice Most common gas? Closest to the Earth? Thermosphere Mesopause Mesosphere Stratopause Stratosphere Tropopause Troposphere Earth • O2 • Ar • N2 • CO2 • He

  3. Quiz multiple choice Stratospheric warming? Thermosphere Mesopause Mesosphere Stratopause Stratosphere Tropopause Troposphere Earth • Density increases • Captures heat radiated from Earth • Borders thermosphere • Contains ozone

  4. Essay redux – most common errors Carbon cycle Water cycle Transpiration (or at least one of the –ation’s) Groundwater Glaciers/ice caps Biosphere • Ocean both sink and source • Carbonates are a sink • Sinks and sources are NOT in equilibrium • e.g. Keeling curve

  5. Lecture 4: Insolation • Earth’s tilt & the seasons • Angle of incidence & solar zenith angle • Earth’s energy budget • Insolation and re-radiation • Latitudinal heat balance • The greenhouse effect

  6. HEATING OF THE EARTH’S SURFACE DEPENDS ON THE AMOUNT OF SOLAR RADIATION PER UNIT AREA. SAME AMOUNT OF RADIATION IS DISTRIBUTED OVER A LARGER AREA IN A THAN IN B. RADIATION PER UNIT AREA IS LESS IN A THAN IN B. LESS HEATING IN A THAN IN B. Fig. 2-12, p. 42

  7. Latitudinal Heat Balance

  8. Simple Greenhouse Model But this doesn’t factor in the atmosphere! 254K vs 288K

  9. Lecture 5+6: Temperature controls • Diurnal cycle • Geographic controls • Latitude • Surface type • Elevation • Aspect • Long-term control • Cloud cover • Albedo • Ocean currents • Differential heating of land and water

  10. Chicago NYC Denver STL Santa Fe LA Miami

  11. Lecture 6: Heating, cooling,and stability • Adiabatic processes • Equilibrium and lapse rates • Temperature Inversions • Wind Chill

  12. Adiabatic Expansion and Compression • Ideal gas law: P=dR’T :: PV=nRT • Adiabatic process: no heat added or removed • P(Vγ)=const., T(Vγ-1)=const. • Adiabatic lapse rate (T change with height) • Dry: ≈10oC / km (really 9.8) • Wet: depends on water content, always less than dry rate; ≈6oC / km

  13. Equilibrium in the atmosphere

  14. Fig. 3.12 • Lifecycle of a nocturnal (radiative) temperature inversion • Mid-afternoon • Evening • Sunrise • Mid-morning Fig. 3-19, p. 75

  15. Wind Chill Factor • The wind chill factor describes the increased loss of heat by the body due to the movement of air. • The wind causes an increased rate of evaporation of perspiration from the skin.. • It cannot be measured, so it is calculated • Wind chill equivalent temperature

More Related