Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

How the clear blue Med is washed up and dead

01.12.2004


As millions of holidaymakers will testify, the Mediterranean is uniquely clear – and blue – unlike the cloudy grey of many coastal waters. But how many of its grateful bathers realise that the Med is so crystal clear because it’s the ocean equivalent of the Sahara desert?



A Leeds-led team of international scientists studying the fragile marine ecosystem of the Eastern Mediterranean has found that the reason the waters are so transparent is an acute shortage of phosphates – vital elements at the bottom of the marine food chain.

Currents through the Straits of Sicily are ‘washing’ nutrient-rich waters out of the Mediterranean, and bringing in fresh surface water which has no nutrients. Without these fertilisers, plankton cannot grow, depriving bacteria of the food they need to process the extra nitrates in the water, and release them into the atmosphere as nitrogen. Thus the seas of the Mediterranean have a build-up of nitrates – around twice as much, proportionately, as the other oceans of the world – but few plants and nutrients to cloud the water.


Leeds earth and biosphere institute director Professor Michael Krom said: “Many of the great ancient civilisations have developed on the shores of the Eastern Mediterranean, and more recently it has become home to millions of people and the holiday destination for millions more.” “But despite all these people, the waters have remained clear deep blue, rather than the murky grey associated with highly populated areas whose waste products normally increase nutrient levels in the seas into which they flow.”

Professor Krom’s team, drawn from seven countries, has finally provided the link between the ‘blueness’ of the Mediterranean, and its high imbalance of phosphates and nitrates. “The oceans are the life support system of the planet, and so understanding the elements controlling plant growth in the oceans is a big deal,” said Professor Krom.

The research results will be fed into the Mediterranean forecasting system, which is developing the world’s first ‘weather forecast’ for ocean waters.

Vanessa Bridge | alfa
Further information:
http://reporter.leeds.ac.uk/503/s1.htm
http://www.leeds.ac.uk

More articles from Earth Sciences:

nachricht Scientists turn carbon emissions into usable energy
21.01.2019 | Ulsan National Institute of Science and Technology (UNIST)

nachricht Ten-year anniversary of the Neumayer Station III
18.01.2019 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Ten-year anniversary of the Neumayer Station III

The scientific and political community alike stress the importance of German Antarctic research

Joint Press Release from the BMBF and AWI

The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...

Im Focus: Ultra ultrasound to transform new tech

World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles

The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.

Im Focus: Flying Optical Cats for Quantum Communication

Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.

In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...

Im Focus: Nanocellulose for novel implants: Ears from the 3D-printer

Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.

It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:

Im Focus: Elucidating the Atomic Mechanism of Superlubricity

The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.

One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Our digital society in 2040

16.01.2019 | Event News

11th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Aachen, 3-4 April 2019

14.01.2019 | Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

 
Latest News

Scientists discover new 'architecture' in corn

21.01.2019 | Life Sciences

Broadband achromatic metalens focuses light regardless of polarization

21.01.2019 | Physics and Astronomy

Nuclear actin filaments determine T helper cell function

21.01.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>