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Section 5 Atmospheric Waves: Introduction

Section 5 Atmospheric Waves: Introduction. Clouds: why are they regularly spaced?. Vertical Velocity ( w ) Field During a Model Initial Adjustment Periods. 200 hPa Geopotential Height Composite during El Nino Events : The Pacific-North American (PNA) Pattern.

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Section 5 Atmospheric Waves: Introduction

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  1. Section 5 Atmospheric Waves:Introduction

  2. Clouds: why are they regularly spaced?

  3. Vertical Velocity (w) Field During a Model Initial Adjustment Periods

  4. 200 hPaGeopotential Height Composite during El Nino Events: The Pacific-North American (PNA) Pattern How does a tropical forcing induce a stationary wave train pattern extending to the extratropics? Years: Nino 3.4 
1958: 1.607 
1966: 1.308 
1973: 1.639 
1983: 2.548 
1987: 1.254 
1992: 1.820 
1995: 1.013 
1998: 2.396 
2003: 1.162

  5. What are waves? What if you throw a rock into the lake? Waves are oscillations (in field variables, such as velocity or pressure) that propagate in space.

  6. One-dimensional wave:

  7. Two-dimensional wave:

  8. What are we going to do? • Linearize the governing equations using the perturbation method • Derive the analytic wave solution • What is the dynamic mechanism of the wave? • What determines the wave propagation speed? • Group velocity and wave dispersion

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