Posts Tagged ‘sea level fall’

Sea level dropped in 2010/11 but only because it rained in Australia!

August 19, 2013

Wonders will never cease! If we just make sure that more moisture is trapped in clouds and that it rains more over land we can prevent sea level rise and even cause sea level to fall

Sea level is rising to catastrophic levels because of global warming and that, of course, is due the our using fossil fuels – or so the global warming theology would have us believe. But sea levels dropped by 0.7mm in 2010/2011. But not to worry. The catastrophe theory remains intact. This was just due to it raining too much over land in Australia and the tropics that year.

A new paper but an old tired song:

John T. Fasullo, Carmen Boening, Felix W. Landerer and R. Steven Nerem, Australia’s unique influence on global sea level in 2010–2011, Geophysical Research Letters, DOI: 10.1002/grl.50834

AbstractIn 2011, a significant drop in global sea level occurred that was unprecedented in the altimeter era and concurrent with an exceptionally strong La Niña. This analysis examines multiple datasets in exploring the physical basis for the drop’s exceptional intensity and persistence. Australia’s hydrologic surface mass anomaly is shown to have been a dominant contributor to the 2011 global total and associated precipitation anomalies were among the highest on record. The persistence of Australia’s mass anomaly is attributed to the continent’s unique surface hydrology, which includes expansive arheic and endorheic basins that impede runoff to ocean. Based on Australia’s key role, attribution of sea level variability is addressed. The modulating influences of the Indian Ocean Dipole and Southern Annular Mode on La Niña teleconnections are found to be key drivers of anomalous precipitation in the continent’s interior and the associated surface mass, and sea level responses.

PhysOrg recites the dogma:

When enough raindrops fall over land instead of the ocean, they begin to add up. New research led by the National Center for Atmospheric Research (NCAR) shows that when three atmospheric patterns came together over the Indian and Pacific oceans, they drove so much precipitation over Australia in 2010 and 2011 that the world’s ocean levels dropped measurably. Unlike other continents, the soils and topography of Australia prevent almost all of its precipitation from running off into the ocean. 

The 2010-11 event temporarily halted a long-term trend of rising sea levels caused by higher temperatures and melting ice sheets. 

Now that the atmospheric patterns have snapped back and more rain is falling over tropical oceans, the seas are rising again. In fact, with Australia in a major drought, they are rising faster than before.

“It’s a beautiful illustration of how complicated our climate system is,” says NCAR scientist John Fasullo, the lead author of the study. “The smallest continent in the world can affect sea level worldwide. Its influence is so strong that it can temporarily overcome the background trend of rising sea levels that we see with climate change.”

….. As the climate warms, the world’s oceans have been rising in recent decades by just more than 3 millimeters (0.1 inches) annually. This is partly because the heat causes water to expand, and partly because runoff from retreating glaciers and ice sheets is making its way into the oceans.

But for an 18-month period beginning in 2010, the oceans mysteriously dropped by about 7 millimeters (about 0.3 inches), more than offsetting the annual rise.

Fasullo and his co-authors published research last year demonstrating that the reason had to do with the increased rainfall over tropical continents. They also showed that the drop coincided with the atmospheric oscillation known as La Niña, which cooled tropical surface waters in the eastern Pacific and suppressed rainfall there while enhancing it over portions of the tropical Pacific, Africa, South America, and Australia.

But an analysis of the historical record showed that past La Niña events only rarely accompanied such a pronounced drop in sea level. ….

When sea level rises it is due to global warming. But when it falls it is due to too much rain over Australia. Nothing to do with the standstill in global temperatures for the last 17 years of course!

As I posted a month or so ago

Sea levels in the past have been 10 m higher than today and 150 m lower than today.

Alarmism will have us believe that +5 cm ±15 cm in sea level that may actually happen by 2100 will threaten the very existence of humanity!

new paper from Nils-Axel Mörner.


……. The Earth’s rate of rotation records a mean acceleration from 1972 to 2012, contradicting all claims of a rapid global sea level rise, and instead suggests stable, to slightly falling, sea levels.Best estimates for future sea level changes up to the year 2100 are in the range of +5 cm ±15 cm

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