That alternative hypothesis has been falsified.
A. Please expand. Link?
B. These cyclic events influence the reading of a weather station thermometer (or a proxy). Yes or no?
1. Rotation of the Earth (surface air warms and cools on a 24 hour cycle).
2. Revolution around the sun (away from the equator, a 365 day cycle)
3. Pacific Decadal Oscilation
4. 11 year sunspot cycle
5. Precession of the axis (~25,000 years)
5. Periodic changes in the tilt of the Earth's axis (~40,000 years)
6. Periodic changes in the eccentricity of the Earth's orbit (~400,000 years)
7. Periodic (?) changes in the orientation of the Earth's magnetic field
8. Passage of the solar system through the galactic plane (225 m.y. cycle) (speculative).
These aperiodic events influence surface air temperatures. Yes or no?
1. Volcanism (Mt. Pinatubo, Tambora)
2. Cometary, asteroidal impact
3. Mountain building (alters jet stream, exposes new rock to chemical interaction with air
4. Continental drift (alters ocean currents, creates inland deserts in supercontinents, gives ice a platform in Antarctica)
5. Other (e.g., the draining of Lake Agassiz, possibly responsible for the Younger Dryas).
Agree? If no, why not?