lomiller
Penultimate Amazing
- Joined
- Jul 31, 2007
- Messages
- 13,208
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).
Please show us which theory suggests the daily rotation of the earth is responsible for long term warming trends.
2. Revolution around the sun (away from the equator, a 365 day cycle)
please show us which theory you are referring to that suggests the earths yearly revolution around the sun is responsible for observed climate change.
3. Pacific Decadal Oscilation
Please who us which published theory suggests the PDO is responsible for climate change of the past 100 years.
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)
These cycles are indeed linked to very long term climate change, unfortunately for your argument they exert a very slight cooling influence.
7. Periodic (?) changes in the orientation of the Earth's magnetic field
Please show us a peer reviewed publication suggesting this is causing current climate change, (or for that matter has ever caused climate change)
8. Passage of the solar system through the galactic plane (225 m.y. cycle) (speculative).
This is strictly a pop-science hypothesis with no documented physical effect large enough to influence the earths climate. Investigations into the proposed physical effect show it several orders of magnitude too small to have any climate effect.
These aperiodic events influence surface air temperatures. Yes or no?
1. Volcanism (Mt. Pinatubo, Tambora)
These would have a cooling effect, so couldn't explain the current warming
2. Cometary, asteroidal impact
No major impact has occured in the relavent timefram so this can't expalin the current warming trend.
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).
In the last 100 years neither of these has occurred at rates sufficient to cause the current warming trend
5. Other (e.g., the draining of Lake Agassiz, possibly responsible for the Younger Dryas).
There have been no examples of such a massive melt water lake spilling into the ocean in the last 100 years nor would that explain the current warming trend.