Deep Sea Mining: What are the risks?

During the launch event in Kiel, the project partners plan investigations to ecosystems around the manganese nodules. Photo: J. Steffen, GEOMAR

GEOMAR coordinates European cooperation for the risk assessment
01.29.2015 / Kiel. 50 specialists in deep-sea ecology, marine mining and deep-sea observation of 25 European research institutions meeting this week at the GEOMAR Helmholtz Centre for Ocean Research Kiel. This will free the start of a three-year research project to investigate the risks of potential ore mining on the seabed. The project called "JPI Oceans Ecological aspects of deep-sea mining" is coordinated at GEOMAR.

The world population is growing. This also means that more and more people need a home, want to work with computers and other electronic devices and consume energy. For the construction of houses for the manufacture of electronic goods, but also for the production of wind turbines will require significant amounts of various metals. Currently, all metal ores are promoted on almost a third of the earth's surface - on the continents. 

In some regions of the ocean manganese nodules are recorded in the Atlantic as here, close together on the ocean floors. Photo: Nils Brenke, CeNak

However, in recent decades engaged again, the other two thirds, the oceans, the focus of governments and resource companies. "Many questions about a potential ore mining in the deep sea, however, are still open," says Dr. Matthias Haeckel from GEOMAR Helmholtz Centre for Ocean Research Kiel. He is the scientific coordinator of the "Ecological aspects of deep-sea mining" project to investigate the potential environmental risks in the next three years. A consortium of research ministries in eleven European countries promotes it as part of the Joint Programme Healthy and Productive Seas (JPI Oceans) initiative with a total of 9.5 million euros. 

 In the Clarion-Clipperton Zone are the largest known manganese nodule deposits. Here, the ISA has been awarded 13 research licenses. Image Reproduced from the GEBCO world map 2014

This week, the project starts with a kick-off meeting at GEOMAR. A total of 25 partner institutions from these eleven countries involved in the project. The focus is primarily known as manganese nodules. It is spherical or cauliflower-shaped Erzknollen, which are usually at depths below 4000 meters on the large abyssal plains. They consist not only from the eponymous manganese, but also contain iron and coveted metals such as copper, cobalt or nickel. Already in the 1970s, there were initial plans to reduce manganese nodules from the deep sea, but never came out on trials. The largest reserves are currently known from the Clarion-Clipperton Fracture Zone in the central Pacific. As a result of these activities in international waters on the basis of the International Law of the Sea (UNCLOS), the International Seabed Authority (International Seabed Authority, ISA) was founded in 1994. 

It manages the entire seabed beyond the exclusive economic zone (200 nautical miles) of individual states. To date, the ISA has awarded 13 research licenses for exploration of manganese nodule fields in the Pacific, including in Germany and other European countries. 

                     Sample of the seabed in DISCOL area with top resting manganese nodules. 
                                                    Photo: M. Haeckel, GEOMAR

"But there is no mining licenses, which would only be a next step," said Dr. Haeckel. Since the ISA also aims to ensure effective protection of the marine environment from the potential consequences of ocean mining, relevant research for the licensees are required. "Of course industrial activities on the ocean floor will have an impact, because they disturb the soil and the water column about it," says Dr. Haeckel. Therefore, it is important to know the ecosystems on the sea floor and its local, regional and national connections and interactions accurately. Already this year, several expeditions of the new German research vessel SONNE in the Pacific are planned. 

The first trips in March and April perform the participating scientists to the German, Belgian and French license areas and in a defined by the ISA reserve in the Clarion-Clipperton Zone. Further trips from July to October have the so-called DISCOL area in Peru Basin to the destination. There, in 1989, a very limited area of the seabed was plowed for research purposes. "The goal of this experiment is to recognize the long-term consequences of large-area device used for deep-sea sediments," explains Professor Jens Greinert from GEOMAR, who will lead one of the exits to DISCOL area. Now, a quarter century after the disturbance experiment, the scientists will examine the then machined seabed areas exactly compare with adjacent undisturbed areas to determine, can recover disturbed communities in the deep sea as fast. "We should get to know each other better before we start, a large area to intervene in the deep sea it easy," says project coordinator Dr. Haeckel. 

Source: GEOMAR

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NASA Study Finds Earth’s Ocean Abyss Has Not Warmed

While the upper part of the world’s oceans continue to absorb heat from global warming, ocean depths have not warmed measurably in the last decade. This image shows heat radiating from the Pacific Ocean as imaged by the NASA’s Clouds and the Earth's Radiant Energy System instrument on the Terra satellite. (Blue regions indicate thick cloud cover.) Image Credit: NASA

The cold waters of Earth’s deep ocean have not warmed measurably since 2005, according to a new NASA study, leaving unsolved the mystery of why global warming appears to have slowed in recent years.

Scientists at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, analyzed satellite and direct ocean temperature data from 2005 to 2013 and found the ocean abyss below 1.24 miles (1,995 meters) has not warmed measurably. Study coauthor Josh Willis of JPL said these findings do not throw suspicion on climate change itself.

"The sea level is still rising," Willis noted. "We're just trying to understand the nitty-gritty details."

In the 21st century, greenhouse gases have continued to accumulate in the atmosphere, just as they did in the 20th century, but global average surface air temperatures have stopped rising in tandem with the gases. The temperature of the top half of the world's oceans -- above the 1.24-mile mark -- is still climbing, but not fast enough to account for the stalled air temperatures.

Many processes on land, air and sea have been invoked to explain what is happening to the "missing" heat. One of the most prominent ideas is that the bottom half of the ocean is taking up the slack, but supporting evidence is slim. This latest study is the first to test the idea using satellite observations, as well as direct temperature measurements of the upper ocean. Scientists have been taking the temperature of the top half of the ocean directly since 2005, using a network of 3,000 floating temperature probes called the Argo array.

"The deep parts of the ocean are harder to measure," said JPL's William Llovel, lead author of the study published Sunday in the journal Nature Climate Change. "The combination of satellite and direct temperature data gives us a glimpse of how much sea level rise is due to deep warming. The answer is -- not much."

Deep sea creatures, like these anemones at a hydrothermal vent, are not yet feeling the heat from global climate change. Although the top half of the ocean continues to warm, the bottom half has not increased measurably in temperature in the last decade. Image Credit: NERC

The study took advantage of the fact that water expands as it gets warmer. The sea level is rising because of this expansion and the water added by glacier and ice sheet melt.
To arrive at their conclusion, the JPL scientists did a straightforward subtraction calculation, using data for 2005-2013 from the Argo buoys, NASA's Jason-1 and Jason-2 satellites, and the agency’s Gravity Recovery and Climate Experiment (GRACE) satellites. 
From the total amount of sea level rise, they subtracted the amount of rise from the expansion in the upper ocean, and the amount of rise that came from added meltwater. The remainder represented the amount of sea level rise caused by warming in the deep ocean.
The remainder was essentially zero. Deep ocean warming contributed virtually nothing to sea level rise during this period.

Coauthor Felix Landerer of JPL noted that during the same period warming in the top half of the ocean continued unabated, an unequivocal sign that our planet is heating up. Some recent studies reporting deep-ocean warming were, in fact, referring to the warming in the upper half of the ocean but below the topmost layer, which ends about 0.4 mile (700 meters) down.

Landerer also is a coauthor of another paper in the same journal issue on 1970-2005 ocean warming in the Southern Hemisphere. Before Argo floats were deployed, temperature measurements in the Southern Ocean were spotty, at best. Using satellite measurements and climate simulations of sea level changes around the world, the new study found the global ocean absorbed far more heat in those 35 years than previously thought -- a whopping 24 to 58 percent more than early estimates.

Both papers result from the work of the newly formed NASA Sea Level Change Team, an interdisciplinary group tasked with using NASA satellite data to improve the accuracy and scale of current and future estimates of sea level change. The Southern Hemisphere paper was led by three scientists at Lawrence Livermore National Laboratory in Livermore, California.

NASA monitors Earth's vital signs from land, air and space with a fleet of satellites and ambitious airborne and ground-based observation campaigns. NASA develops new ways to observe and study Earth's interconnected natural systems with long-term data records and computer analysis tools to better see how our planet is changing. The agency shares this unique knowledge with the global community and works with institutions in the United States and around the world that contribute to understanding and protecting our home planet.

Source: Nasa

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Tailor-made for the aquaculture sector

Details are important. The hood is specially adapted for personnel wearing helmets – without compromising vision. Credit: SINTEF Health Research

Fish husbandry workers have played an active part in developing work clothing tailor-made for their wet, windy and messy working conditions.

They're standing in a small circle around a net pen out in the ocean. Their job is to maintain the net pens, de-louse the salmon, and carry out the many other tasks essential to the running of a fish farm facility. The wind is bitter and the rain is lashing in from all directions. Sea water is splashing around their feet. Everything they handle is wet. Cold water creeps relentlessly up to their knees and along to their elbows inside their coveralls, which are only waterproof up until the second wash.

This is a normal working day for a couple of thousand workers in fish farms all along the Norwegian coast. In spite of this no work clothing exists that is specifically adapted to their very special working conditions. Yet.

Industrial designers Tore Christian Bjørsvik Storholmen and Ole Petter Næsgaard at SINTEF Health Research have developed work clothing which they hope will make conditions both safer and more comfortable for husbandry workers out on the fish farms. Their project has been carried out in close collaboration with the workers who will be wearing the clothing.

Better together

"We've spent a lot of time getting to know the business and the needs of the husbandry workers," says Næsgaard. "We've taken part in many tasks, observed what goes on, and have obtained input and feedback in response to our suggestions," he says. "We've met with a thoroughly honest group of people. They don't hold back when they're not satisfied," he says.

They visited three different facilities close to Hitra and Frøya as part of a pilot project. Ideas and sketches made during one visit were taken to the next so that they could encourage reactions and get feedback. It has been an iterative process involving an ongoing series of corrections and improvements.

"This has served as a quality control on our work to develop relevant and attractive solutions," says Storholmen. "We could never have put the first prototype on the market," he says. "But our dialogue with the users has enabled continuous refinement. New details are always being developed and incorporated. "We're now getting close to a product that can be introduced to the market," he says.

Inspired by climbers and skiers

"When we were studying the husbandry workers, we saw that they do a lot of climbing from boat to boat through ropes and cables and across a variety of different barriers. This led us to obtain inspiration from clothes developed for climbers. The result is that the clothing now offers a very good fit - combined with excellent freedom of movement," explains Storholmen.

When it comes to choosing fabrics, the researchers have obtained greater inspiration from sports clothes than from other types of work clothing. Instead of thick, insulated suits, the new clothing concept has much more in common with kit worn by skiers.

"We've exploited the shell principle," says Storholmen. "The fabric of the outermost layer is water- and wind-proof and very light and durable," he says. "We've also developed intermediate layers and underwear, so users can select the clothing they need based on weather conditions and their own level of activity," he explains.

The clothing is also specifically adapted to allow good freedom of movement in the neck area - even when wearing a life vest. The same applies to the hood which has plenty of room for the mandatory helmet. What about reflective patches? These are placed strategically on the arms, hood and shoulders, and not across the shoulders and legs which is standard for the majority of existing work clothing.

"Actually, we saw that workers testing the clothing were at first sorry to have to return it following the tests," says Storholmen. "This has to be a good sign," he says.

However, the developers are not satisfied simply with anatomical adjustments, new fabrics and good visibility. There has to be a place for modern technology in this type of clothing. So the suit is equipped with a waterproof pocket for a mobile phone, and will also be fitted with a separate pocket to accommodate a man-overboard alarm.

Comfort equals effective HSE

The fish farms visited by the researchers are in exposed coastal locations, often about a half-hour's boat trip from land. The husbandry workers are housed in floating pontoons, surrounded by net pens. They may have to stay here for as much as a week at a time. There have been situations where workers have fallen into the sea. It is essential that the new work clothing represents an improvement in safety. It must be easy for the wearer to get hold of important tools such as knives, tape and communications equipment.

"An Operations Manager told us that good work clothing is one of the most important aids to effective HSE," says Storholmen. "People standing around getting cold lose concentration on what they're doing, making accidents more likely. We believe that this is thoroughly addressed by the new clothing," he says.

A net pen is an enormous "warehouse," and if a major accident occurs, the consequences for the environment and the company's profitability may be very large.

"Aquaculture uniform"

The clothing currently worn by husbandry workers is essentially the same as the standard primarily developed for the building and construction industry, where competitive pricing is a major issue. The clothing being developed in this project will probably be more expensive.

"Current work clothing is a consumer item," say the researchers. "Our impression is that there is a willingness to pay for a better and more durable product specifically adapted to the needs of the aquaculture industry - a specially designed "aquaculture uniform" which can identify the workers and promote an increase in the pride they have in their profession," they say.

Source: SINTEF

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You can hear the coral reefs dying, experts say

A lionfish in an Indonesian reef. Credit: Image courtesy of University of Essex

You can hear the sound of former bustling coral reefs dying due to the impact of human activity, according to new research from the Universities of Essex and Exeter.

Coral reefs are amongst the noisiest environments on our planet and healthy reefs can be heard using underwater microphones from kilometres away.

However, scientists have found that coral reefs impacted by human activity, such as overfishing, are much quieter than protected reefs, which can have a big impact on the fish and invertebrates which rely on the reefs for survival.

Led by Dr Julius Piercy, from the University of Essex, the study, which also involved the University of Derby, involved taking acoustic recordings of coral reefs with different levels of protection around islands in the Philippines. The research found that the noise produced by the few remaining resident fish and crustaceans on unprotected reefs was only one third of the sound produced at bustling, healthy reef communities

This is particularly important to the larval stages of reef fish and invertebrates, which spend the first few days of their life away from reefs and use sound as an orientation cue to find their way back. With less sound being produced at impacted reefs, the distance over which larvae can detect habitat is ten times less, impacting on the replenishment of future generations needed to build up and maintain healthy population levels.

"In an environment where underwater noise plays such an important role in the population dynamics of coral reefs, it is alarming to find such a large effect of human impact on the natural acoustic environment," explained Dr Piercy. "This puts reef sound in the spotlight for the people who manage coral reef ecosystems on two counts. Firstly, that they might need to consider reef sound as an integral part of the design of marine protected area networks to ensure that there is sufficient recruitment of larvae within and between reserves and neighbouring reefs. Secondly, this study shows sound can be useful in monitoring the health of coral reefs."

With growing evidence demonstrating the direct impacts of human-made noise on aquatic life, these findings highlight additional indirect human impacts -- such as overfishing and landscape development -- on natural underwater sounds.

Dr Steve Simpson, from Biosciences at the University of Exeter, added: "Taking sound recordings is a cheap, fast and objective way to get a broad idea of whether a reef is in a good condition or not. While it cannot replace detailed visual surveys conducted by snorkelers or divers, it gives a good account of the cryptic and nocturnal species missed in visual census, and quickly provides a general picture of the state of coral reefs without requiring time-consuming surveys and extensive training."

The researchers also found that reef sounds can be detected further away than predicted, increasing previous estimates of the likely detection zone for recruiting larvae and increasing the potential importance of reef sound in attracting new fish and crustaceans to coral reefs.

The study highlights the need to further characterise reef soundscapes and identify acoustic cues that larvae tune into when seeking a suitable home. Dr Simpson said: "We still know very little about what sounds these animals are listening to and it is likely to be very different between species. Combined with recent findings that fish dislike the smell of impacted reefs (another homing cue used by the larvae), there is a real need to understand how human impacts can indirectly affect the success of future generations of reef organisms."

Source: University of Essex

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Biologist reveals how whales may 'sing' for their supper

Humpback whales.
Credit: Susan Parks

Humpback whales have a trick or two when it comes to finding a quick snack at the bottom of the ocean. But how they pinpoint that meal at night, with little or no available light, remains a mystery.

Susan Parks, assistant professor of biology in the College of Arts and Sciences, in collaboration with a consortium of other researchers, has been studying these unique feeding behaviors. Her research emphasizes the importance of specific auditory cues that these mammoth creatures emit as they search the deep ocean for their prey.

Her findings are the subject of an article in the December issue of Scientific Reports ("Evidence for acoustic communication among bottom foraging humpback whales," 2014), co-authored by researchers at Moss Landing Marine Laboratories, Oregon State University, Gerry E. Studds Stellwagen Bank National Marine Sanctuary and the Whale Center of New England.

"Humpback whales are known to cooperate with others to corral prey near the surface," says Parks, who studies marine science and acoustic communication. "Recent studies suggest they may cooperate [with each other], when feeding on bottom prey, as well."

Parks was part of a collaborative multi-institutional consortium that has spent a decade monitoring humpback feeding behaviors in the Gerry E. Studds Stellwagen Bank National Marine Sanctuary, off the coast of Massachusetts. Whales were tagged with special underwater recording devices so Parks could determine how specific acoustic sounds correlated with successful seafloor feeding.

The investigation revealed that whales make "tick-tock" noises while hunting together at night in deep, pitch-black water, but are silent when hunting alone.

On the menu? Mostly sand lance -- eel-like fish known to bury themselves in the sand of the ocean floor. Parks suggests that whales' vocal sounds may help flush the sand lance out of hiding to where they're scooped up and eaten.

The clock-like sounds created by whales may also serve as a dinner bell of sorts for other nearby whales during late-night feedings.

"Hints of behavior suggest that other whales who overhear the sounds are attracted to them and may eavesdrop on other whales hunting for food," Parks adds.

Prior to joining Syracuse's faculty in 2011, Parks held various appointments at Pennsylvania State University, Cornell University and the Woods Hole Oceanographic Institution. She is the recipient of numerous honors and awards, including the Presidential Early Career Award for Scientists and Engineers, the U.S. government's highest honor for scientists and engineers.

Source:  Syracuse University

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