While global warming alarmists continue to spout shocking predictions about our coasts being inundated by rising sea levels, the best data given current interpretations is that the sea levels have not risen for several years.
An article by Jet Propulsion Laboratory scientist Josh Willis describes a project for measuring sea level from 3000 autonomous ocean floats maintained by the Argo project.
Willis is an ardent believer in global warming, caused by man. Note: "Now that humans have become a major force in the Earth’s climate, it is of paramount importance to build and maintain observing systems that can keep track of our ever-increasing impact." He has accepted the dogma that humans are a "major force" in earth's climate.
Willis also believes that the oceans will give us the easiest and best guage of global warming. "The most sensitive yardstick of human influence on the climate is the rise in globally-averaged sea level. On climate-relevant time-scales, total sea level rise equals the sum of the melt water from glaciers and ice sheets, plus the thermal expansion of seawater caused by absorption of excess heat. The first effect represents the response of the ice to a warming atmosphere. The second is directly related to the balance of incoming and outgoing energy of the Earth as a whole. That’s because 80 – 90% of the excess energy from anthropogenic forcing winds up warming the oceans (Levitus et al., 2005)."
Nevertheless, earlier data showed a rapid drop in sea levels, a fact reported by Rush Limbaugh, to the consternation of the "consensus" that man was causing dangerous warming.
With greater care to reduce software and measuring biases, a corrected result has been obtained. Sea level measurements when corrected for these errors no longer show rapid global sea level decline (and therefore global cooling). On the other hand, they show no sea level rise, either. Assuming that the glaciers are melting into the oceans, which would normally cause sea level increases, sea volume (per equivalent mass of H20) must be shrinking by an amount that counteracts the added glacial melt. Why? Because there is no rise in sea level from 2003 to 2006.
Josh Willis' article is a cautionary tale about the difficulty of accurately measuring anything that relates to global climate. It is also sobering for global warming alarmists. Sea levels may not be falling. But they do not appear to be rising, contrary to the shrieking of scientists and activists trying to convince us that we are destroying the planet with greenhouse gases.
The United Nations' Intergovernmental Panel on Climate Change (IPCC) -- the scientific "consensus" -- predicts a sea level rise of 0.18 - 0.59 meters ( 7 - 23 inches) by the year 2099, depending on the models and assumptions used. If sea levels were to rise 0.5 meters (approximately 18 inches), that would require an average increase of 5mm/year sea level rise. However, past measurements have shown only a 3mm annual rise, and recent measurements show no rise at all. It appears that even conservative predictions have been overly alarmist.
Either the glaciers are not melting, or the oceans are not warming. How else can one explain the non-rise in sea levels? Possibly both conditions are occurring.
Global surface air temperatures have been in decline for ten years.
The Antarctic Ice Sheet is growing.
Glaciers that have been melting for over a century are now growing. (Actually, on average, glaciers have been melting for over 10,000 years, but that could change. A look at temperature trends over the past 400,000 years indicate we are overdue for a return to a long ice age.)
The melting of Greenland ice is not accelerating, perhaps slowing.
It is time to follow the advice of the Hitchhiker's Guide to the Galaxy: "Don't panic!" The people who are trying to incite panic are trying to sell you something.