vessels

Mississippi River Running Dry | Earth Wise

October 27, 2023 By EarthWise Leave a Comment

Water levels in the lower Mississippi River are running very low. During September, the readings in Memphis, Tennessee were within inches of the all-time low. The situation is causing real problems for the grain export industry.

The water levels of the lower Mississippi are determined by the amount of rainfall in the upper Midwest. At the point where the Ohio and Mississippi Rivers come together, about 90% of the water headed for the lower Mississippi has been accumulated.

Almost 400 miles of the Mississippi have experienced water levels at or below critical levels for shipping. During September, parts of the Mississippi have been closed to ship traffic more than 20 times. At least 36 vessels were reported to have run aground.

The low water levels on the river have caused shippers of soybean and corn exports to lighten their loads to keep the vessels from running aground. They have also reduced how many barges they pull at once in order to be able to navigate shipping channels that have narrowed because of the reduced water levels.

Fall is the busiest grain export season for the region. About 60% of grain exports from the Midwest leave the U.S. through terminals on the Gulf Coast. The low levels of the Mississippi River threaten gridlock for this vital industry. It has caused freight costs to be the highest since historic river lows last year caused U.S. grain to be less competitive globally.

Unfortunately, October is not normally a strong precipitation month, but the hope is that the El Niño now underway may lead to increased precipitation in the Southern U.S.

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Mississippi River Nears Historic Lows, Putting Grain Exports at Risk

Photo, posted March 8, 2023, courtesy of Errol Sandler via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Orcas Versus Boats | Earth Wise

July 11, 2023 By EarthWise Leave a Comment

Over the past three years, orcas (also known as killer whales) have been attacking boats off the coasts of Portugal and Spain. The subpopulation of orcas in this region has been harassing boats, most often by biting at their rudders.

There have been over 500 reported instances of orcas reacting to boats. Sometimes they simply approach the vessels, but some of the time they actually attack. Almost 20% of the attacks have caused enough damage to disable the vessels. In three cases, including one in May in the Strait of Gibraltar, the animals damaged a boat so badly that it sank. To date, no one has been injured during these attacks.

Orca researchers have observed several different killer whales during these attacks. They seem to come from two separate groups: a trio of juveniles occasionally joined by a fourth, as well as a mixed-age group consisting of an adult female, two of her offspring, and two of her sisters. The attacks typically last less than 30 minutes but can go on for up to 2 hours.

Researchers don’t really know why orcas are going after watercraft. This behavior has not been observed anywhere else in the world. One theory is that the orcas have invented a new fad. That’s actually something that they are known to do. Much as with people, orca fads are often spearheaded by juveniles. An alternative theory is that the attacks may be a response to a bad past experience involving a boat. The fact that nobody has been injured in any of these attacks, even when the boats sank, suggests that only the boats themselves are the target of the attacks and not the people on them.

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Why Has a Group of Orcas Suddenly Started Attacking Boats?

Photo, posted May 24, 2023, courtesy of Pedro Szekely via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Air Pollution In The Arctic | Earth Wise

March 8, 2023 By EarthWise Leave a Comment

Climate change is shrinking the Arctic ice cover, which is making it easier for ships to travel along the northern coast of Russia, known as the Northern Sea Route or the Northeast Passage. There is also the Northwest Passage, which connects the Atlantic and Pacific Oceans via waterways through the Canadian Arctic Archipelago.

More than 600 fishing vessels sail the waters of the Arctic Ocean, but these fishing vessels are not the worst offenders when it comes to the growing problem of air pollution. Giant natural gas tankers are becoming a much bigger problem.

In 2021, only 26 natural gas tankers traveled through Arctic waters. But these ships can be 1000 feet long or more and produce far more CO2 emissions than fishing boats. In 2019, the tankers accounted for 28% of the emissions and the number of them cruising the Arctic has been growing.

As the ice cover in the Arctic continues to shrink, more and more ships of all varieties, including cruise ships, fishing vessels, as well as tankers, are coming north and spending more time in the Arctic. Any increases in ship traffic will increase the pollutant load in the Arctic and the Arctic is one of the most vulnerable environments in the world.

Between 2013 and 2019, the aggregated nautical miles that vessels traveled in what is called the Polar Code area increased by 75%. It isn’t just that more ships like tankers are going there. It is that their operational season is expanding.

Air pollution isn’t the only problem. Shipping in the Arctic brings with it light pollution, noise, marine litter, and more. Only zero activity has zero pollution.

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The worst polluters in the Arctic are not what you think

Photo, posted February 26, 2015, courtesy of Chris Parker via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Tracking Small-Scale Fishers | Earth Wise

October 4, 2022 By EarthWise Leave a Comment

About half of all global seafood is caught by artisanal fishers. These are individuals who operate on a small scale – often on a subsistence level – and typically fish only a short distance from shore. Over 85% of the estimated 2.5 million motorized fishing vessels in the world are less than 12 meters in length. Compared with large-scale commercial fishing operations, these enterprises are very small. However, they are essential to the food security and livelihoods of their communities. Because of their sheer numbers, artisanal fishers are an important sector to monitor, manage, and advocate for. They may be small-scale, but their importance and impact are huge.

Large ships make use of vessel tracking systems, which were originally conceived to prevent maritime collisions. Over time, VTS technology has become useful for other purposes including monitoring fishing activity in sensitive marine areas and looking out for forced labor on the high seas.

Among small fishing vessels, only an estimated 0.4% are equipped with VTS technology. So, a massive number of vessels accounting for a big part of the global catch cannot be monitored.

Researchers at UC Santa Barbara surveyed hundreds of artisanal fishers in Indonesia and Mexico to see if they were willing to pay to participate in a VTS program, or participate for free, or be paid to participate. Having the equipment would provide multiple benefits to the fishers including increased safety and better fisheries management. Two-thirds of the survey participants said they were willing to pay for the technology. The study is the first effort to explore the potential for encouraging wide adoption of VTS technology among artisanal fishers.

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Tracking Small-Scale Fishers

Photo, posted November 30, 2014, courtesy of Bernard Spragg via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Saving Costs And Reducing Emissions From Shipping | Earth Wise

March 2, 2020 By EarthWise Leave a Comment

International shipping is a large and growing source of greenhouse gas emissions. Maritime transport produces about a billion tons of CO2 annually, accounting for about 2.5% of global greenhouse gas emissions. The environmental impact of shipping includes air pollution, water pollution, and even acoustic pollution. In many coastal areas, ships are responsible for more than 18% of some air pollutants. Overall, there are more than 100,000 transport ships at sea, of which about 6,000 are large container ships.

In recent years, the shipping sector has had both internal willingness and external pressure to reduce emissions, but shipping is a tough, competitive business and it isn’t easy to stay competitive and help protect the environment.

A recent study at Abo Akademi University in Finland has found that improved ship utilization rates and investments in environmentally sustainable technologies for enhanced energy efficiency would significantly reduce carbon dioxide emissions. Of equal importance, those same measures would contribute to lowering of freight costs.

If the same cargo volume can be shipped using less fuel, shipping companies will gain major savings in terms of fuel costs. Digitalization can provide valuable benefits. For example, new digital planning and booking systems would enable smarter use of routes while also diminishing traffic with half-empty vessels or even ones with no cargo aboard. Reducing such underutilization would improve the capacity utilization rate and eliminate emissions caused by so-called ballast traffic.

Global shipping continues to grow. It is essential that it becomes smarter and more efficient to protect the environment and improve its economics.

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Environmentally friendly shipping helps to reduce freight costs

Photo, posted February 18, 2016, courtesy of Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.