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Chapter 1: Observations of the climate system

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Graphs of T with latitude, height, season. Atmospheric composition. Graphs of humidity - lat, height, season - link to T. Composition of oceans - where is the ... – PowerPoint PPT presentation

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Title: Chapter 1: Observations of the climate system


1
Chapter 1 Observations of the climate
system Vertical temperature structure of the
atmosphere troposphere, stratosphere,
mesosphere, thermosphere Lapse Rate Graphs of T
with latitude, height, season Atmospheric
composition Graphs of humidity - lat, height,
season - link to T Composition of oceans - where
is the water found? Structure of oceans - T and
salinity with latitude and depth Cryosphere sea
ice, snow cover Land surface Hydrostatic
balance derivation, relationship to
pressure Clausius Clapeyron relationship
2
Chapter 2 Global energy balance Orbital
characteristics eccentricity, obliquity,
longitude of perihelion Flux from the
sun Stefan-Boltzmann law Combined to get
emission temperature of earth Greenhouse effect
- illustrated through a simple slab atmopshere
model Global radiative budget Solar flux per
unit surface area on the earth zenith angle Daily
average insolation as a function of latitude and
month Global maps of Albedo, outgoing LW
radiation, Net radiation -gt Inferred polewards
heat transport Graph of polewards heat transport
by atm and ocean
3
Chapter 3 Atmospheric Radiative
transfer Electromagnetic radiation speed,
frequency, wavelength. Spectrum Description of
radiative energy Plancks law of blackbody
radiation and relationship to the
Stefan-Boltzmann law Absorption of SW and LW by
gases How do atoms/molecules interact with
radiation? Translational, rotational,
vibrational, photodissociation, electronic
excitation, photoionization line
broadening Absorption of radiation - simple
theory Lambert-Bouguet-Beer law, optical depth,
mean free path Emission and absorption solution
to the emission/absorption equation (integral
equation of transfer)
4
  • Radiative equilibrium
  • 2 layer slab atmosphere example
  • Radiative equilibrium solution - vertical
    temperature profile
  • Lapse rate potential temperature, dry and moist
    adiabats, concept of static stability
  • Radiative-convective equilibrium
  • Heating rates - contributions from various
    greenhouse gases to the radiative and
    radiative-convective balance
  • Flux divergence and heating
  • Role of clouds in the radiative balance
  • Cloud distribution
  • Cloud impact on albedo and emissivity -
    dependence on cloud top height and thickness
  • Cloud forcing
  • Aerosols

5
  • Chapter 4 Surface energy balance
  • Fluxes through the surface LW,SW,Latent,
    Sensible
  • Surface energy budget
  • Heat storage at the surface comparison between
    atm and ocean/land, penetration depth
  • How soil temperature varies during the day
  • Radiative heating at the surface
  • SW- albedo variations, dependence on zenith
    angle, frequency of radiation, moisture at sfc
  • LW-emissivity
  • Atmospheric boundary layer
  • Mechanical and convective turbulence
  • Eddy covariance and SH/LE
  • Parameterization of SH/LE dependence of transfer
    coefficient on roughness, vertical stability,
    reference height
  • Bowen ratio and equilibrium bowen ratio

6
  • Diurnal variations of T in boundary layer
  • Surface Energy balance
  • Values over latitude/land/ocean/earth
  • Diurnal variations over land
  • Seasonal variations over land - dependence on
    moisture
  • Seasonal variations over the ocean
  • Annual means over the ocean
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