Navigation Links
New tool for measuring frozen gas in ocean floor sediments
Date:2/26/2013

A collaboration between the National Oceanography Centre (NOC) and the University of Southampton is to develop an instrument capable of simulating the high pressures and low temperatures needed to create hydrate in sediment samples.

Dr Angus Best of NOC and Professors Tim Leighton and Paul White from the University of Southampton's Institute of Sound and Vibration Research (ISVR) have been awarded a grant of 0,8 million by the Natural Environment Research Council (NERC) to investigate methods for assessing the volume of methane gas and gas hydrate locked in seafloor sediments.

Dr Best, who is leading the project, explained: "Greenhouse gases, such as methane and carbon dioxide, are trapped in sediments beneath the seafloor on continental shelves and slopes around the world. Currently, there are only very broad estimates of the amount of seafloor methane and hydrate."

The team plan a series of experiments on a range of sediment types, such as sand and mud. They intend to map out the acoustic and electrical properties of differing amounts of free methane gas and frozen solid methane hydrate.

The laboratory-based approach adopted by the team will involve the development of a major new Acoustic Pulse Tube instrument at NOC. Using acoustic techniques and theories developed by the ISVR team, they aim to provide improved geophysical remote sensing capabilities for better quantification of seafloor gas and hydrate deposits in the ocean floor.

"Not much is known about the state of gas morphology bubbles. Muddy sediments show crack-like bubbles, while sandy sediments show spherical bubbles. Only dedicated lab experiments can hope to unravel the complex interactions. By creating our own 'cores' of sediment material in a controlled environment where we know the concentrations of methane or carbon dioxide, we can create models to help us with in situ measurements on the seafloor."

There is significant interest in sub-seafloor carbon-dioxide storage sites. Methane hydrates are a potential energy resource that could be exploited in future. They may also contribute to geo-hazards such as seafloor landslides it is thought that earthquakes and the release of gas hydrates caused the largest-ever landslide, the Storegga Slide, around 8,000 years ago.

Professor Leighton said: "The three of us have collaborated in recent years in an experiment that used acoustics to take preliminary measurements of gas in the muddy sediments revealed at low tide. Those measurements, and the acoustic theory we developed to interpret the data, provided exactly the foundation we needed to undertake this critically important study that will be relevant to the seabed in somewhat deeper waters.

"As a greenhouse gas, methane is 20 times more potent per molecule than carbon dioxide. There is the potential for climate change to alter sea temperatures and cause more methane gas to be released from seabed hydrates into bubbles which reach the atmosphere. It is therefore vital that we have the tools to quantify and map the amount of methane that is down there."


'/>"/>

Contact: Kim Marshall-Brown
0238-059-6170
National Oceanography Centre, Southampton (UK)
Source:Eurekalert  

Related biology news :

1. New protocol recommendations for measuring soil organic carbon sequestration
2. Measuring the exertion of mini-basketball players
3. Measuring dispersal -- how well are soft-sediment invertebrate communities connected on the seafloor?
4. Bringing measuring accuracy to radical treatment
5. Measuring mercury levels: Nano-velcro detects water-borne toxic metals
6. Measuring progesterone receptor expression to improve hormone-receptor-positive cancer management
7. Measuring our carbon footprint
8. Oceanographers develop method for measuring the pace of life in deep sediments
9. Better outcome for frozen embryo replacement vs IVF
10. Color in fossil insects, diamonds from the ancient ocean floor and modeling the worlds largest rivers
11. Vibrant mix of marine life found at extreme ocean depths, Scripps analysis reveals
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New tool for measuring frozen gas in ocean floor sediments
(Date:3/22/2016)... , March 22, 2016 ... report "Electronic Sensors Market for Consumer Industry by Type ... Others), Application (Communication & IT, Entertainment, Home ... Global Forecast to 2022", published by MarketsandMarkets, ... expected to reach USD 26.76 Billion by ...
(Date:3/17/2016)... March 17, 2016 ABI Research, the ... the global biometrics market will reach more than ... increase from 2015. Consumer electronics, particularly smartphones, continue ... sensors anticipated to reach two billion shipments by ... Dimitrios Pavlakis , Research Analyst at ABI Research. ...
(Date:3/14/2016)... , Allemagne, March 14, 2016 ... http://www.apimages.com ) - --> - Renvoi : ... - --> --> ... solutions biométriques, fournit de nouveaux lecteurs d,empreintes digitales ... LF10 de DERMALOG sera utilisé pour produire des ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... ... May 26, 2016 , ... After several promising ... at the City of Knowledge in Panama, a 6 year-old Duchenne’s muscular ... US earlier this year following FDA approval of a second application for a ...
(Date:5/25/2016)... ... May 25, 2016 , ... ... delegation at BIO 2016 in San Francisco. Located at booth number 7301, representatives ... to answer questions and discuss the Thai biotechnology and life sciences sector. ...
(Date:5/25/2016)... ... May 25, 2016 , ... Scientists at the University of ... tried for mesothelioma may be hampering the research that could lead to one good ... here to read it now. , The team evaluated 98 mesothelioma patients ...
(Date:5/24/2016)... , ... May 24, 2016 , ... ... diabetes, and traumatic injuries, will be accelerated by research at Worcester Polytechnic Institute ... engines of wound healing and tissue regeneration. , The novel method, developed by ...
Breaking Biology Technology: