The latest Greenie "rising sea-level" scare debunked

Benny Peiser has recently had a correspondence with some of the people at "Nature" magazine over the way their online site ignored an article (by Raper and Braithwaite). in their own magazine about sea-levels NOT rising as much as was once thought and promoted another article (by Church & White) in another journal that said the opposite. Below is a fairly devastating excerpt from one of Benny's emails to "Nature" staffers. Benny points out, among other things, that the alarmist paper even contradicts what the IPCC (the world HQ of the global warming religion) says:

"But let's forget for a moment how this editorial accident happened and why Nature editors selected an alarmist paper on sea level rise for the spotlight instead of an anti-alarmist paper published by Nature on the same day. Is there really "no real contradiction between the two papers in any case," as you claim?

For a start, the paper by Raper and Braithwaite is a fundamental critique of the 2001 IPCC model that assumes "that glaciers melt away completely for any warming rather than approaching a new equilibrium." Instead, the two new models used by Raper and Braithwaite estimate a sea level rise due to the melting of glaciers and icecaps of ~0.05 m by 2100, "about half of previous projections." [Note for those of us who still cannot hack metric: 5 centimetres is about 2 inches -- a tiny rise]

Now, the irony of the latest Nature affair is that the lead-author of the "previous projections" criticised by Raper and Braithwaite, is none other than John Church himself, the star of your news story. Given that Church's IPCC chapter on sea level rise is questioned and his high estimates essentially halved, it does look a bit dodgy to provide him - on the same day that his high estimate is debunked - a platform to announce that his latest finding "matches up nicely with (IPCC) model predictions."

What is more, you didn't even mention that the contentious claims by Church and White are more alarmist than (and in fact contradict) the current IPCC TAR "consensus" which states: "No significant acceleration in the rate of sea level rise during the 20th century has been detected." It will be interesting to monitor whether Nature's media promotion given to a 'consensus-breaking' paper will be able to overturn the 2001 IPCC stance. Perhaps we are even seeing the beginnings of another "hockey stick" controversy. After all, Church and White haven't provided any new sea level data - they've only applied a different statistical method to the same data set, data that previously didn't show any significant acceleration.

In fact, Cabanes et al. (2001) who analysed sea level trends between 1950-1998 suggest that the very limited coverage of historical tide gauges cannot provide a meaningful estimate of the average global sea level rise for the past century. And since most historical tide gauges were located in regions of substantial ocean warming, they suggest that the estimates of 20th century sea level rise from tide gauge records may have been overestimated by a factor of 2.

Finally, a recent paper by Volkov and van Aken (2005; see abstract below) suggests that "the recently reported local trends of sea level are not necessarily related to the global sea level rise, but may be part of interdecadal fluctuations."

These any many other papers confirm the existance of huge uncertainties. What this means is that the jury is still out whether or not there is any significant acceleration of global sea level. Nature editors would be well advised to provide more balanced and a less alarmist coverage of climate change research and debates. But after years of complaints, I'm not holding my breath. Nature's apparent addiction to worst-case scenarios and prophecies of fire and brimestone are difficult to kick".




SEA-LEVEL RISES AND FALLS CAN BE REGIONAL RATHER THAN GLOBAL

(New paper in GEOPHYSICAL RESEARCH LETTERS, VOL. 32, 2005 L14611 (2005) by Denis L. Volkov, Hendrik M. van Aken. Abstract only).

Climate-related change of sea level in the extratropical North Atlantic and North Pacific in 1993-2003

Abstract:

Climate-related change of sea level is one of the most challenging concerns for humankind. Here we present a comparative analysis of the interannual variability of sea level in the extratropical North Atlantic and North Pacific oceans based on the high-accuracy TOPEX/Poseidon, Jason-1 and ERS-1/2 measurements from November 1992 to June 2003. We found indications of the interdecadal variability of the sea level in the North Pacific possibly related to the Pacific Decadal Oscillation and suggested that the observed decadal rise of sea level in the subpolar and eastern North Atlantic may have been related to the interdecadal change. While the North Atlantic subtropical and subpolar gyres decelerated, the opposite occurred in the North Pacific. The year-to-year variations of sea level showed coherence between the North Atlantic Oscillation, El Ni¤o/La Ni¤a and Pacific Decadal Oscillation events and respective gyre-scale changes.

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