Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Seabed Research Will Have Global Significance

06.09.2002

Sediments in the Arabian Sea will be examined by an international scientific expedition led by a researcher from the University of Edinburgh to increase understanding of the natural processes of the ocean floor and establish its significance for global cycles and climate change. Robotic research platforms will be deployed on the sea floor to study deep-sea organisms and their impacts on sedimentary processes, without removing the creatures from their natural environment. Monsoons—winds that blow in opposite directions at different times of year— cause the Arabian Sea to be a site of huge productivity and create a mid-depth layer of intensely oxygen-depleted water. Production of plant life in the surface waters and subsequent transformations in underlying waters and sediments represent important terms in the global carbon, nitrogen and phosphorous cycles, which, in turn, affect climate. Fluxes of dissolved metals, nutrients and organic matter from oxygen-depleted sediments are also of potential global importance.

Although a number of scientific expeditions have visited the Arabian Sea during the past decade, the ocean floor has received little attention because of difficulties in accessing the seabed. The benthic (sedimentary) communities, which range from bacteria to surface-dwelling crabs and deeply burrowing worms, strongly influence the physical state of the sediments and a wide range of important geochemical processes because of the way they mix and irrigate the seafloor deposits. Expedition leader Dr Greg Cowie of the Geology and Geophysics Department said: “The Arabian Sea sediments form a ‘factory’ where nutrients, metals and organic matter undergo major transformations. This is especially true at depths of between 200 and 1000 metres where oxygen-depleted waters bathe the Arabian Sea’s margins. Because of the remote setting and consequent difficulty in studying organisms in their natural environment, very little information is available on the mechanisms and impacts of faunal contribution to seafloor processes. This remains a major gap in our understanding of how the sediment system functions.”

The scientific team will study conditions across the oxygen minimum zone (OMZ) on the Indus margin of the Arabian Sea, which serves as a natural laboratory. “We will carry out studies of the faunal communities under contrasting oxygen levels at sites across the OMZ, alongside detailed assessments of sediment geochemistry,” said Greg Cowie.

Platforms, known as benthic landers, will be set up on the seafloor and used for incubation experiments in which tracers will be used to examine sediment processing by benthic creatures and its impact on nutrient, metal and organic matter cycling. The information obtained will help improve our understanding of the workings of the sea-bed and their connection with geochemical cycles and climate changes. The expedition will consist of four cruises on the RRS Charles Darwin in 2003.

Linda Menzies | AlphaGalileo

More articles from Earth Sciences:

nachricht Upwards with the “bubble shuttle”: How sea floor microbes get involved with methane reduction in the water column
27.05.2020 | Leibniz-Institut für Ostseeforschung Warnemünde

nachricht An international team including scientists from MARUM discovered ongoing and future tropical diversity decline
26.05.2020 | MARUM - Zentrum für Marine Umweltwissenschaften an der Universität Bremen

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Biotechnology: Triggered by light, a novel way to switch on an enzyme

In living cells, enzymes drive biochemical metabolic processes enabling reactions to take place efficiently. It is this very ability which allows them to be used as catalysts in biotechnology, for example to create chemical products such as pharmaceutics. Researchers now identified an enzyme that, when illuminated with blue light, becomes catalytically active and initiates a reaction that was previously unknown in enzymatics. The study was published in "Nature Communications".

Enzymes: they are the central drivers for biochemical metabolic processes in every living cell, enabling reactions to take place efficiently. It is this very...

Im Focus: New double-contrast technique picks up small tumors on MRI

Early detection of tumors is extremely important in treating cancer. A new technique developed by researchers at the University of California, Davis offers a significant advance in using magnetic resonance imaging to pick out even very small tumors from normal tissue. The work is published May 25 in the journal Nature Nanotechnology.

researchers at the University of California, Davis offers a significant advance in using magnetic resonance imaging to pick out even very small tumors from...

Im Focus: I-call - When microimplants communicate with each other / Innovation driver digitization - "Smart Health“

Microelectronics as a key technology enables numerous innovations in the field of intelligent medical technology. The Fraunhofer Institute for Biomedical Engineering IBMT coordinates the BMBF cooperative project "I-call" realizing the first electronic system for ultrasound-based, safe and interference-resistant data transmission between implants in the human body.

When microelectronic systems are used for medical applications, they have to meet high requirements in terms of biocompatibility, reliability, energy...

Im Focus: When predictions of theoretical chemists become reality

Thomas Heine, Professor of Theoretical Chemistry at TU Dresden, together with his team, first predicted a topological 2D polymer in 2019. Only one year later, an international team led by Italian researchers was able to synthesize these materials and experimentally prove their topological properties. For the renowned journal Nature Materials, this was the occasion to invite Thomas Heine to a News and Views article, which was published this week. Under the title "Making 2D Topological Polymers a reality" Prof. Heine describes how his theory became a reality.

Ultrathin materials are extremely interesting as building blocks for next generation nano electronic devices, as it is much easier to make circuits and other...

Im Focus: Rolling into the deep

Scientists took a leukocyte as the blueprint and developed a microrobot that has the size, shape and moving capabilities of a white blood cell. Simulating a blood vessel in a laboratory setting, they succeeded in magnetically navigating the ball-shaped microroller through this dynamic and dense environment. The drug-delivery vehicle withstood the simulated blood flow, pushing the developments in targeted drug delivery a step further: inside the body, there is no better access route to all tissues and organs than the circulatory system. A robot that could actually travel through this finely woven web would revolutionize the minimally-invasive treatment of illnesses.

A team of scientists from the Max Planck Institute for Intelligent Systems (MPI-IS) in Stuttgart invented a tiny microrobot that resembles a white blood cell...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Dresden Nexus Conference 2020: Same Time, Virtual Format, Registration Opened

19.05.2020 | Event News

Aachen Machine Tool Colloquium AWK'21 will take place on June 10 and 11, 2021

07.04.2020 | Event News

International Coral Reef Symposium in Bremen Postponed by a Year

06.04.2020 | Event News

 
Latest News

Black nitrogen: Bayreuth researchers discover new high-pressure material and solve a puzzle of the periodic table

29.05.2020 | Materials Sciences

Argonne researchers create active material out of microscopic spinning particles

29.05.2020 | Materials Sciences

Smart windows that self-illuminate on rainy days

29.05.2020 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>