Study Guide & Educational Overview
### Core Meteorological Principles:
* **Atmospheric Structure**: Troposphere (where all weather occurs, 0–12 km), Stratosphere (contains protective ozone layer), Mesosphere, Thermosphere, Exosphere.
* **Gas Composition**: Nitrogen (78.08%), Oxygen (20.95%), Argon (0.93%), Carbon Dioxide (0.04%).
* **Severe Weather Dynamics**:
* *Tornadoes*: Measured by the Enhanced Fujita (EF) scale (EF0 to EF5); form in rotating updrafts (mesocyclones) inside supercell thunderstorms.
* *Hurricanes / Typhoons*: Measured by the Saffir-Simpson Hurricane Wind Scale (Category 1 to 5); require warm sea surface temperatures $\ge 26.5^\circ\text{C}$ ($80^\circ\text{F}$) and low wind shear.
* **Atmospheric Physics**:
* *Coriolis Effect*: Inertial force deflecting moving air rightward in Northern Hemisphere and leftward in Southern Hemisphere.
* *Rayleigh Scattering*: Selective scattering of short blue wavelengths explaining blue daytime skies.
* *Pressure*: Measured by barometers in hectopascals (hPa) or millibars (mb); 1 standard atmosphere = 1013.25 hPa.
* **Atmospheric Structure**: Troposphere (where all weather occurs, 0–12 km), Stratosphere (contains protective ozone layer), Mesosphere, Thermosphere, Exosphere.
* **Gas Composition**: Nitrogen (78.08%), Oxygen (20.95%), Argon (0.93%), Carbon Dioxide (0.04%).
* **Severe Weather Dynamics**:
* *Tornadoes*: Measured by the Enhanced Fujita (EF) scale (EF0 to EF5); form in rotating updrafts (mesocyclones) inside supercell thunderstorms.
* *Hurricanes / Typhoons*: Measured by the Saffir-Simpson Hurricane Wind Scale (Category 1 to 5); require warm sea surface temperatures $\ge 26.5^\circ\text{C}$ ($80^\circ\text{F}$) and low wind shear.
* **Atmospheric Physics**:
* *Coriolis Effect*: Inertial force deflecting moving air rightward in Northern Hemisphere and leftward in Southern Hemisphere.
* *Rayleigh Scattering*: Selective scattering of short blue wavelengths explaining blue daytime skies.
* *Pressure*: Measured by barometers in hectopascals (hPa) or millibars (mb); 1 standard atmosphere = 1013.25 hPa.
Frequently Asked Questions
Weather describes short-term atmospheric conditions over minutes to days, whereas climate represents the statistical pattern and averages of weather over 30 or more years.
Supercells possess a persistent, deeply rotating updraft known as a mesocyclone, generating the most violent tornadoes and giant hailstones.
