Letters to the Editor

Climate change natural as history proves

Warming debate, over?

Numerous climate change events have occurred over geologic time on this very dynamic planet. Ice core data demonstrate that the last 400,000 years have consisted of a number of short warm interglacials (10,000 to 30,000 years) alternated with longer (70,000 to 90,000 years) glacials. Ocean levels rise and fall between these periods.

Terrestrial and undersea volcanic activity has been the primary catalyst for most climate change cycles for hundreds of millions of years, and significantly contributes to CO2 levels in our atmosphere. Earth's natural processes mitigate high CO2 levels over time.

The axis tilt of the Earth undergoes a wobble every 20,000 years, causing dramatic cyclical change in climate and shift in the worldwide distribution of flora and fauna.

Fossils found in the central Saharan desert and satellite images exposed three former fresh water inland lakes. These massive ancient lakes were fed by monsoon rains that had shifted north.

Human settlements and abundant flora and fauna thrived in this region until it became arid some 8,000 years ago. Deep sea sediment cores drilled off the western African coast establish that the last wet-to-dry shift took less than 200 years.

Additionally, a large asteroid impact or "Super Volcano" eruption would return us to a glacial climate cycle within a few months due to the voluminous amounts of ash propelled high into the atmosphere reflecting sunlight for years.

Man is not a significant factor in climate change. Man will either adapt to cyclical climate change or he will become extinct.

Mark Mason

Sarasota

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