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Politics : Manmade Global Warming, A hoax? A Scam? or a Doomsday Cult? -- Ignore unavailable to you. Want to Upgrade?

To: Don Hurst who wrote (2608)	6/6/2011 2:38:45 AM
From: The Vet	4 Recommendations Read Replies (2) \| Respond to of 4326

As a SCUBA diver of many years experience diving many of the worlds tropical coral reefs, my experience is that coral bleaching has been around for many years and is a natural result of coral growth. Coral grows all the time and as it does it gets closer to the surface. Because the algae contained within the coral needs light for photosynthesis, corals usually grow faster and more densely in shallower water. However there is a limit, which results from the effects of sun and tides and that's where bleaching appears. The effect can be experienced by anyone who walks into an isolated tidal pool on a hot summers day. The shallow water can become very much hotter than the ocean and can remain that way until flooded by the incoming tide. When seasonally low tides coincide with hot, still, sunny weather, any areas of very shallow coral get exposed to much higher than normal temperatures and sunlight without sufficient water to protect them. If this happens a few days in a row the coral exposed to these conditions bleach and die. It's a simple natural way that the coral growth is restricted by water depth and temperature. Trees don't grow forever and neither does coral, but because a bleaching event is invariably timed by the coincidence of very low tides at the same time as a heat wave, the effect can be wide spread and dramatic over a considerable area, but it is not new and it has happened ever since coral grew in the ocean. Some species of coral thrive better in warmer waters than others but none can withstand exposure to high temperature surface water when the sea level is at its lowest. There is good evidence that shows that low water levels expose the coral to more ultraviolet (sea water filters out most of the UV as it gets deeper) and that the UV is more damaging than the actual temperature. Deeper corals are never affected by bleaching, so if the AWG proponents believe that ocean levels will rise then the problem should resolve itself! Just another of the many conflicts in their narrative....