2010, another year of extreme coral bleaching

Tonington

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Oct 27, 2006
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http://www.nytimes.com/2010/09/21/science/earth/21coral.html?_r=1&partner=rss&emc=rss
"This year’s extreme heat is putting the world’s coral reefs under such severe stress that scientists fear widespread die-offs, endangering not only the richest ecosystems in the ocean but also fisheries that feed millions of people.

From Thailand to Texas, corals are reacting to the heat stress by bleaching, or shedding their color and going into survival mode. Many have already died, and more are expected to do so in coming months. Computer forecasts of water temperature suggest that corals in the Caribbean may undergo drastic bleaching in the next few weeks.

What is unfolding this year is only the second known global bleaching of coral reefs. Scientists are holding out hope that this year will not be as bad, over all, as 1998, the hottest year in the historical record, when an estimated 16 percent of the world’s shallow-water reefs died. But in some places, including Thailand, the situation is looking worse than in 1998.

Scientists say the trouble with the reefs is linked to climate change. For years they have warned that corals, highly sensitive to excess heat, would serve as an early indicator of the ecological distress on the planet caused by the buildup of greenhouse gases"
I guess someone forgot to tell the corals that the world is supposed to be cooling...
 

Cobalt_Kid

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Feb 3, 2007
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With a current global energy imbalance of about +0.5w/m2 and C02 concentration increasing by over 2ppm a year I think you can write off most of the coral reefs in the world by the mid point of this century if not sooner. Change is happening so fast that corals and the communities associated with them are going to have little chance to re-establish themsleves as climatic conditions suitable to their growth migrate polewards with the overall warming of the globe.
 

Walter

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Jan 28, 2007
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With a current global energy imbalance of about +0.5w/m2 and C02 concentration increasing by over 2ppm a year I think you can write off most of the coral reefs in the world by the mid point of this century if not sooner. Change is happening so fast that corals and the communities associated with them are going to have little chance to re-establish themsleves as climatic conditions suitable to their growth migrate polewards with the overall warming of the globe.
You're right, because the Earth has always been as it is now and has never before undergone change.
 

Avro

Time Out
Feb 12, 2007
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You're right, because the Earth has always been as it is now and has never before undergone change.

Is this you admiting there is change Walt?

Good boy, you're starting to get it old fella.

Now can you tell me what forced the last change?
 

Cobalt_Kid

Council Member
Feb 3, 2007
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You're right, because the Earth has always been as it is now and has never before undergone change.

We overwhelmed the natural climate forcings years ago, the change going on now is at a rate only seen rarely in the geological record, namely the mass extinction events.
 

Cobalt_Kid

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Feb 3, 2007
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Oh well, life goes on.

Yes, but for less and less species every day.

Research shows that habitats are migrating polewards at about 35 kilometres a decade while the biotas(flora and fauna) are only able to migrate at about 8 km/decade.

With the warming already inevitable we're looking at a loss of about 20% of species by the end of this century. This goes up to about 60% with a doubling of C02 levels from pre-industrial times.

According to James Hansen at between a +10-20 watts per metre squared forcing we'll cross a tipping point that results in a runaway greenhouse effect that will kill all surface life... in which case life won't go on.
 

Tonington

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Oct 27, 2006
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The topic is coral bleaching due to excessive temperatures. If you want to debate causation, detection, and attribution of climate change; whether the planet is warming; stolen emails or any other related topics, there are plenty of threads for those already.

The topic here is climate change impacts on corals, which at our current pace of change, are substantive.
 

Avro

Time Out
Feb 12, 2007
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The topic is coral bleaching due to excessive temperatures. If you want to debate causation, detection, and attribution of climate change; whether the planet is warming; stolen emails or any other related topics, there are plenty of threads for those already.

The topic here is climate change impacts on corals, which at our current pace of change, are substantive.

Can't be done Tonn, this topic dosen't go well with the denier talking points.

Just like that long winded junk spewed out by Praxious....eveything that was said there has been thoroughly debunked again and again.

Coral reefs....umm....duh....oh yeah....well......life goes on....nah nah nah.

Hows that for science.:roll:
 

petros

The Central Scrutinizer
Nov 21, 2008
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The topic is coral bleaching due to excessive temperatures. If you want to debate causation, detection, and attribution of climate change; whether the planet is warming; stolen emails or any other related topics, there are plenty of threads for those already.

The topic here is climate change impacts on corals, which at our current pace of change, are substantive.
Bleaching during an el Nino year? Gee that's odd.
 
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Tonington

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Bleaching during an el Nino year? Gee that's odd.

There's bleaching in years without an El Nino too. And plenty of El Ninos have occurred, only two global bleaching events have been recorded.
 

Praxius

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Dec 18, 2007
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There's bleaching in years without an El Nino too. And plenty of El Ninos have occurred, only two global bleaching events have been recorded.

That's all well and good, but still, what's the point in making us aware of this?

What do you propose to do about it?

And I mean, what do you propose that will actually do something about it that can be done before they all die off?

If nothing can be done and they're going to die off anyways, what do you propose we do to prepare for the after effects?
 

Tonington

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And I mean, what do you propose that will actually do something about it that can be done before they all die off?

If nothing can be done and they're going to die off anyways, what do you propose we do to prepare for the after effects?

A few things, number one would be to limit human impacts on coral reefs, and that is a big one because all of the stressors add up.

The second, would be to start building colonies of endangered corals, or those most at risk, in areas where they would still be within their tolerated water parameters.