From Science Matters

By Ron Clutz

After one week of the hearing at International Court of Justice (ICJ) the thrust of the event is clear.  It is an attempt to redistribute wealth from nations who developed and prospered from basing their societies on hydrocarbons to other nations who have not done so as successfully.  The “victims” claim compensation because burning hydrocarbons caused global warming which will raise sea levels and flood island nations.  This is called “Climate Justice.”

The parties, including presumably the judges, take this premise without question, so the whole proceeding is based on PR without scientific foundation.

Recently green campaigners were warning that small Pacific islands would drown as sea levels rose. In 2019 United Nations Secretary-General António Guterres flew all the way to Tuvalu, in the South Pacific, for a Time magazine cover shot. Wearing a suit, he stood up to his thighs in the water behind the headline “Our Sinking Planet.” The accompanying article warned the island—and others like it—would be struck “off the map entirely” by rising sea levels.

Earlier this year, the New York Times finally shared what it called “surprising” climate news: Almost all atoll islands are stable or increasing in size. In fact, scientific literature has documented this for more than a decade. While rising sea levels do erode land, additional sand from old coral is washed up on low-lying shores. Extensive studies have long shown this accretion is stronger than climate-caused erosion, meaning the land area of Tuvalu and many other small islands is increasing.

These appeals were made previously by the Maldives and Fiji, who co-hosted the Madrid COP.  But stubborn facts undermine the credibility of the premise.

It is a widely accepted climate view—based on wild speculations from some op/ed writers and partisan politicians–is that average sea levels are increasing dangerously and rationalize an immediate governmental response. But as we shall demonstrate below, this perspective is simply not accurate.

There is a wide scientific consensus (based on satellite laser altimeter readings since 1993) that the rate of increase in overall sea levels has been approximately .12 inches per year.

To put that increase in perspective, the average sea level nine years from now (in 2029) is likely to be approximately one inch higher than it is now (2020). One inch is roughly the distance from the tip of your finger to the first knuckle. Even by the turn of the next century (in 2100), average ocean levels (at that rate of increase) should be only a foot or so higher than they are at present.

None of this sounds particularly alarming for the general society and little of it can justify any draconian regulations or costly infrastructure investments. The exception might be for very low- lying ocean communities or for properties (nuclear power plants) that, if flooded, would present a wide-ranging risk to the general population. But even here there is no reason for immediate panic. Since ocean levels are rising in small, discrete marginal increments, private and public decision makers would have reasonable amounts of time to prepare, adjust and invest (in flood abatement measures, etc.) if required.

But are sea levels actually rising at all? Empirical evidence of any substantial increases taken from land-based measurements has been ambiguous. This suggests to some scientists that laser and tidal-based measurements of ocean levels over time have not been particularly accurate.

For example, Professor Niles-Axel Morner (Stockholm University) is infamous in climate circles for arguing–based on his actual study of sea levels in the Fiji Islands–that “there are no traces of any present rise in sea levels; on the contrary, full stability.” And while Morner’s views are controversial, he has at least supplied peer reviewed empirical evidence to substantiate his nihilist position on the sea-level increase hypothesis.

The world has many important societal problems and only a limited amount of resources to address them. What we don’t need are overly dramatic climate-change claims that are unsubstantiated and arrive attached to expensive public policies that, if enacted, would fundamentally alter the foundations of our economic system.