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Satellite altimetry data showing rate of sea level rise  (Source: University of Colorado, Boulder)
World's oceans rise slower since 2005, fail to display predicted accelerating trend.

Satellite altimetry data indicates that the rate at which the world's oceans are rising has slowed significantly since 2005. Before the decrease, sea level had been rising by more than 3mm/year, which corresponds to an increase of about one foot per century. Since 2005, however, the rate has been closer to 2mm/year.

The decrease is significant as global climate models predict sea level rise to accelerate as atmospheric CO2 continues to increase. In the 1990s, when such acceleration appeared to be occurring, some scientists pointed to it as confirmation the models were operating correctly.

Sea level rise was calculated from altimetry data from the TOPEX/Poseidon and Jason-1 satellite missions, published by the University of Colorado, Boulder.

Dr. James Choe, a research associate with the University of Colorado, says the decrease is temporary. "Interannual variations often cause the rate to rise or fall", he says. Choe believes an accelerating trend will reappear within the next few years. Oceanographer Gary Mitchum of the University of South Florida, says making any judgement from the limited data available is "statistically so uncertain as to be meaningless".

Others disagree. Dr. Vincent Gray, a New Zealand based climatologist and expert reviewer for the IPCC, believes that the accelerated trends seen earlier were simply an artifact of poor measurements. "The satellite system has undoubtedly shown a rise since 1992, but it has leveled off", he tells DailyTech. "They had some bad calibration errors at the beginning."

Gray points to a study done by Flanders University using tide gauges which, he says, measured no perceptible increase in sea level over its entire 15 year period.

Sea level has been rising since the end of the last ice age, some 20,000 years ago. During an episode known as "Meltwater Pulse 1A", the world's oceans rose by more than 5 meters per century, a rate about 20 times faster than the current increase.

TOPEX/Poseidon was launched by NASA in 1992, and collected data until 2005. In 2001, NASA and France's Centre National d'Études Spatiales (CNES) launched its follow-up mission, Jason-1.

Jason-2 was launched in June of this year.



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By RandomUsername3463 on 12/16/2008 2:18:01 PM , Rating: 2
If you care to look, you'll find fanaticism spread equally among sociopolitical groups. For example, "conservative christian fanatics" will bomb abortion clinic, attempting murder, to save unborn children / fetuses. "liberal environmental fanatics" will bomb research facilities, attempting murder, to save primates or other animals.

Us humans always want to think that the group (class, race, religion, political party, school, etc) we belong to is better than the other groups. While this is not true 100% of the time, I'd suggest that if you see the "other" guys as more fanatical, you should take a long look at the fringes of your "own" group before pointing a finger.


By ebakke on 12/16/2008 6:57:30 PM , Rating: 2
Have you read what I was posting at all? I didn't claim one group was any better than another. In fact, I said I dislike anyone who's fanatical, regardless of the issue. The original post to which I replied asked for something that is the right's "fault". So I provided one. If it had been "left" instead of "right", I probably would've provided an environmentalism example (much like you did).

But you're right, before I start pointing at the crazies, I should look at the fringes of my own group. People who like logic, facts, and evidence as means of making arguments. I guess the 'fringes' of that group would be people who are too logical and who lack emotion.

Ugh. I'm done with this.


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