US Scientists: The Gulf Stream ‘Is NOT Slowing Down’

gulf-stream-is-not-slowing-down Data came from the global network of Argo floats in the oceans

The Gulf Stream does not appear to be slowing down, say US scientists who have used satellites to monitor tell-tale changes in the height of the sea.

Confirming work by other scientists using different methodologies, they found dramatic short-term variability but no longer-term trend.

A slow-down – dramatised in the movie The Day After Tomorrow – is projected by some models of climate change.

The research is published in the journal Geophysical Research Letters.

The stream is a key process in the climate of western Europe, bringing heat northwards from the tropics and keeping countries such as the UK 4-6C warmer than they would otherwise be.

It forms part of a larger movement of water, the Atlantic Meridional Overturning Circulation, which is itself one component of the global thermohaline system of currents.

Between 2002 and 2009, the team says, there was no trend discernible – just a lot of variability on short timescales.

The Atlantic overturning circulation is still an important player in today’s climate
Josh Willis, Nasa

The satellite record going back to 1993 did suggest a small increase in flow, although the researchers cannot be sure it is significant.

“The changes we’re seeing in overturning strength are probably part of a natural cycle,” said Josh Willis from Nasa’s Jet Propulsion Laboratory (JPL) in California.

“The slight increase in overturning since 1993 coincides with a decades-long natural pattern of Atlantic heating and cooling.”

Short measures

The first observations suggesting the circulation was slowing down emerged in 2005, in research from the UK’s National Oceanography Centre (NOC).

Using an array of detectors across the Atlantic and comparing its readings against historical records, scientists suggested the volume of cold water returning southwards could have fallen by as much as 30% in half a century – a significant decline.

The surface water sinks in the Arctic and flows back southwards at the bottom of the ocean, driving the circulation.

However, later observations by the same team showed that the strength of the flow varied hugely on short timescales – from one season to the next, or even shorter.

But they have not found any clear trend since 2004.

thermohaline-circulation
The global thermohaline circulation takes warm and cold water across the oceans

Rapid relief

The NOC team now has a chain of instruments in place across the Atlantic, making measurements continuously.

“In four-and-a-half years of measurement, we have found there is a lot of variability, and we’re working to explain it,” said NOC’s Harry Bryden.

The quantities of water involved are huge, varying between four million and 35 million tonnes of water per second.

The array is part of the UK-funded Rapid project, which aims to refine understanding of potentially large climate change impacts that could happen in short periods.

Professor Bryden’s team calculates that their system is good enough to detect a long-term change in flow of about 20% – but it has not happened yet.

He believes the JPL approach – using satellite altimeters, instruments that can measure sea height precisely, and the Argo array of autonomous floating probes – could potentially add useful data to that coming from long-term on-site monitoring arrays.

But, he points out: “The method concentrates only on the upper [northward] flow – it doesn’t give you much information on the returning flow southward.”

Fantasy and reality

Driven by Hollywood, a popular image of a Gulf Stream slowdown shows a sudden catastrophic event driving snowstorms across the temperate lands of western Europe and eastern North America.

That has always been fantasy – as, said Josh Willis, is the idea that a slow-down would trigger another ice age.

“But the Atlantic overturning circulation is still an important player in today’s climate,” he added.

“Some have suggested cyclic changes in the overturning may be warming and cooling the whole North Atlantic over the course of several decades and affecting rainfall patterns across the US and Africa, and even the number of hurricanes in the Atlantic.”

By Richard Black
Environment correspondent
Page last updated at 08:48 GMT, Monday, 29 March 2010 09:48 UK

Source: BBC NEWS

And global warming is a scam:

Climategate:

Climategate: The Parliamentary Cover-Up Exposed (Telegraph)

Climategate: Two More Bricks Fall Out Of The IPCC Wall Of Deceit – Rainforests And Polar Bears (Telegraph)

Climategate: Michael Mann’s Very Unhappy ‘Whistleblower’ New Year (Telegraph)

Climategate: Al Gore spews the usual utter nonsense but this time no one believes him (Telegraph)

Climategate: Which part of ‘over’ don’t these people understand? – A quick idiot’s guide to why Climategate does matter (Telegraph)

Climategate and the Tiger Woods Index; Al Gore cancels Copenhagen speaking event (Telegraph)

Lord Christopher Monckton – Climategate: Caught Greenhanded! Cold Facts About The Hot Topic of Global Temperature Change After The Climategate Scandal

Climategate: It’s all unravelling now! (Telegraph)

Climategate: Follow the Money (The Wall Street Journal)

Climategate scandal claims its first big political scalp (Telegraph)

Climategate: Googlegate?! (Telegraph)

Lord Cristopher Monckton on Climategate: Shut Down The UN, Arrest Al Gore

Climategate: This is the worst scientific scandal of our generation (Telegraph)

Climategate: The great climate change science scandal (The Times)

Climategate Scandal: The Whitewash Begins (Telegraph)

Climategate: Hacked emails include calls for ‘Earth Government’ as foundation of new world order, splitting of America

Lord Christopher Monckton on Climategate: ‘They Are Criminals’

Climategate: George Monbiot – aka the Great Moonbat – makes it all suddenly OK through medium of satire (Telegraph)

Climategate: Scientists Would Rather Change Facts Than Their Theories (RT)

Climategate on Lateline: Private climate documents hacked, published

Climategate Bombshell: Dr. Tim Ball on the hacked CRU emails

Climategate: The Day Science Died (TBR)

Climategate: how the MSM reported the greatest scandal in modern science (Telegraph)

Climategate: CRU director admits the emails flying all over the internet appear to be genuine (Herald Sun)

Climategate: The Final Nail in The Coffin of ‘Anthropogenic Global Warming’?! (Telegraph)

Global warming is a scam:

Leading Scientist Warns of Ice Age: ‘Most of Europe Will Be Under Ice’

Met Office blocked role of leading scientist in ‘hockey stick’ climate change row

Godfrey Bloom Exposes the Global Warming Scam (European Parliament, Strasbourg, 20.01.2010)

Lord Christopher Monckton reports on Pachauri’s eye opening Copenhagen presentation

Top Scientist: Rise of Sea Levels is ‘The Greatest Lie Ever Told’

Prof. Ian Clark: ‘Rises in C02 lag 800 years behind temperature rises!’ – You will pay taxes for nothing!

Climate crunch: David Bellamy on global warming fraud

Study: CO2 levels remained constant since 1850! (University of Bristol)

What happened to global warming? The warmest year recorded globally was 1998 (BBC News)

Global Warming Expert Prof. Latif: Earth has not warmed for nearly a decade and that we are likely entering “one or even two decades during which temperatures cool.” (The Calgary Herald)

Solar Physicist Predicts Ice Age: “SOLAR CYCLE 24 HAS NOW GONE CLEARLY BELOW DALTON LEVEL.” (The Examiner)

The Great Global Warming Swindle (Documentary)

Ron Paul: Global Warming Petition Signed by 31,478 Scientists (Lew Rockwell)

NASA Study: Solar Cycle, Not Man, Responsible for Gobal Warming (DailyTech)

Global warming alarmists out in cold (Herald Sun)

Nobody listens to the real climate change experts (Telegraph)

Climate ‘denial’ is now a mental disorder (Telegraph)

Japan’s boffins: Global warming isn’t man-made (The Register)

Al Gore sued by over 30.000 Scientists for fraud (Video)

World is getting colder: It’s the sun, not CO2, that’s to blame (Washington Times)

Global warning: We are actually heading towards a new Ice Age, claim scientists (Daily Mail)

Scientists find greenhouse gas hysteria to be myth (World Net Daily)

2008 was the year man-made global warming was disproved (Telegraph)

Army: Sun, Not Man, Is Causing Climate Change (Wired)

World might be heading towards Ice Age (Economic Times)

Flashback: David Ballamy: ‘BBC shunned Me For Denying Man-Made Global Warming’ (Daily Express)

Follow the money and the New World Order:

EU President Herman Van Rompuy Announces 2009 as ‘First Year of Global Governance’

Congressman Ron Paul on the Copenhagen Treaty and the Cyber Security Act: ‘They are doing everything in the world to control the internet.’

Al Gore could become world’s first carbon billionaire

Lord Christopher Monckton: Is President Obama Poised to Surrender the Constitution and US Sovereignty to World Government? (!!!)

EU Proposes €50bn Climate Change Deal Ahead of December’s Global Climate Change Conference in Copenhagen

So global warming is really about the elite finding more ways to take away your freedom and your money!

Education:

Build-A-Bear: The Sinister Green Plot to Turn Our Kids Into Eco-Fascist Manchurian Candidates

Insane British Government Global Warming Ad: Panic, Little Ones, It’s The Carbon Monster

In the news:

Beijing and Seoul Hit by Heaviest Snow in More Than Half Century

Britain is facing one of the coldest winters in 100 years, experts predict

NCDC: 250 Snowfall Records So Far In 2009; This December Shapes Up to be the Coldest on Record

US Blizzard: Christmas Misery for Millions; Oklahoma State of Emergency (Video)

Blizzard Blasts Eastern US: Hundreds of Thousands of Homes Without Power

Snowing on Copenhagen’s Global Warmist Parade

US East Coast faces severe winter storm

US ‘Monster’ Winter Storm Resembles Wintery Hurricane With Blizzard Conditions

US: Cheyenne records snowiest October on record

Autumn record-setting snowstorm wallops Rockies, Plains

US: Freak Summer Storm Dumps Snow in Yonkers

Nature knows exactly how to deal with CO2:

Carbon Dioxide Air Fertilization Improves Plant Growth and Quality, Cuts Operating Costs While Increasing Production

If you really want to change the climate on this planet then:

Environment: Solar plant yields water and crops from the desert

Greening the Desert

Leave a Comment