Monday, December 6, 2021

Plastic trash in the ocean is a global problem, and the US is the top source – a new report urges action

Plastic debris on a beach on Lanai, a sparsely populated Hawaiian island. 
Matthew Koller, CC BY-ND
From The Conversation by Matthew Savoca, Anna Robuck and Lauren Kashiwabara

Plastic waste of all shapes and sizes permeates the world’s oceans.
It shows up on beaches, in fish and even in Arctic sea ice.
And a new report from the National Academies of Sciences, Engineering, and Medicine makes clear that the U.S. is a big part of the problem.

As the report shows, the U.S. produces a large share of the global supply of plastic resin – the precursor material to all plastic industrial and consumer products.
It also imports and exports billions of dollars’ worth of plastic products every year.

On a per capita basis, the U.S. produces an order of magnitude more plastic waste than China – a nation often vilified over pollution-related issues.
These findings build off a study published in 2020 that concluded that the U.S. is the largest global source of plastic waste, including plastics shipped to other countries that later are mismanaged.

And only a small fraction of plastic in U.S. household waste streams is recycled.
The study calls current U.S. recycling systems “grossly insufficient to manage the diversity, complexity and quantity of plastic waste.”
 

As scientists who study the effects of plastic pollution on marine ecosystems, we view this report as an important first step on a long road to reducing ocean plastic pollution.
While it’s important to make clear how the U.S. is contributing to ocean plastic waste, we see a need for specific, actionable goals and recommendations to mitigate the plastic pollution crisis, and would have liked to see the report go further in that direction.

Plastic is showing up in seafood

Researchers started documenting marine plastic pollution in the late 1960s and early 1970s.
Public and scientific interest in the issue exploded in the early 2000s after oceanographer Charles Moore drew attention to the Great Pacific Garbage Patch – a region in the central north Pacific where ocean currents concentrate floating plastic trash into spinning collections thousands of miles across.

More plastic garbage patches have now been found in the South Pacific, the North and South Atlantic, and the Indian Ocean.
Unsurprisingly, plastic pervades marine food webs.
Over 700 marine species are known to ingest plastic, including over 200 species of fish that humans eat.

Humans also consume plastic that fragments into beverages and food from packaging and inhale microplastic particles in household dust.
Scientists are only beginning to assess what this means for public health.
Research to date suggests that exposure to plastic-associated chemicals may interfere with hormones that regulate many processes in our bodies, cause developmental problems in children, or alter human metabolic processes in ways that promote obesity 
Scientists estimate that if plastics continue to enter the ocean at current rates they will outweigh fish by 2050.
 
Current estimates show that at least 8 million pieces of plastic are entering the oceans every single day, and if left unchecked plastic will outweigh fish by 2050. Here are some shocking figures on how plastic pollution is affecting our oceans and our underwater wildlife.

A need for a national strategy

The new report is a sweeping overview of marine plastic pollution, grounded in science.
However, many of its conclusions and recommendations have been proposed in various forms for years, and in our view the report could have done more to advance those discussions.

For example, it strongly recommends developing a national marine debris monitoring program, led by the National Oceanographic and Atmospheric Administration’s Marine Debris Program.
We agree with this proposal, but the report does not address what to monitor, how to do it or what the specific goals of monitoring should be.

Ideally, we believe the federal government should create a coalition of relevant agencies, such as NOAA, the Environmental Protection Agency and the National Institutes of Health, to tackle plastic pollution.
Agencies have done this in the past in response to acute pollution events, such as the 2010 BP Deepwater Horizon oil spill, but not for chronic problems like marine debris.
The report proposes a cross-government effort as well but does not provide specifics.

 
In 2019 volunteers for the nonprofit Surfrider Foundation removed nearly 300,000 pounds of trash from U.S. beaches, nearly all of it plastic.
Surfrider Foundation, CC BY-ND
 

An underfunded problem

Actions to detect, track and remove plastic waste from the ocean will require substantial financial support.
But there’s little federal funding for marine debris research and cleanup.
In 2020, for example, NOAA’s Marine Debris Program budget request was $US7 million, which represents 0.1% of NOAA’s $5.65B 2020 budget.
Proposed funding for the Marine Debris Program increased by $9 million for fiscal 2022, which is a step in the right direction.

Even so, making progress on ocean plastic waste will require considerably more funding for academic research, nongovernmental organizations and NOAA’s marine debris activities.
Increased support for these programs will help close knowledge gaps, increase public awareness and spur effective action across the entire life cycle of plastics.One way to address marine plastic waste is to capture it before it enters the ocean.
Mr.
Trash Wheel, a solar-powered semi-autonomous trash interceptor, removes floating debris from Baltimore’s Inner Harbor.
 
There has been a great renaissance in garbage collection technology in the past 10 years and Mr. Trash Wheel is one of the pioneers, collecting over 3 million pounds of trash in Baltimore, Maryland. 
An old technology becomes new again and is changing the landscape of the beautiful inner harbor.
 
Corporate responsibility and equity

The private sector also has a crucial role to play in reducing plastic use and waste.
We would have liked to see more discussion in the report of how businesses and industries contribute to the accumulation of ocean plastic waste and their role in solutions.

The report correctly notes that plastic pollution is an environmental justice issue.
Minority and low-income communities are disproportionately affected by many activities that produce plastic waste, from oil drilling emissions to toxic chemicals released during the production or incineration of plastics.
Some proposals in the report, such as better waste management and increased recycling, may benefit these communities – but only if they are directly involved in planning and carrying them out.

The study also highlights the need to produce less plastic and scale up effective plastic recycling.
More public and private funding for solutions like reusable and refillable containers, reduced packaging and standardized plastic recycling processes would increase opportunities for consumers to shift away from single-use disposable products.

Plastic pollution threatens the world’s oceans.
It also poses direct and indirect risks to human health.
We hope the bipartisan support this study has received is a sign that U.S. leaders are ready to take far-reaching action on this critical environmental problem.
 

Sunday, December 5, 2021

A kitesurfing session in over 50 knots of wind

 

Here it is, my jump from the cap frehel!
For those who dont know it, this is one of the most beautiful and mystic places close to my home in Britanny, France.
I ve been dreaming about jumping from this cliff for years & after analyzing how the weather is at this spot and how this jump could be done the perfect conditions were finally aligned!

Saturday, December 4, 2021

France & misc. (SHOM) layer update in the GeoGarage platform

170 nautical raster charts updated (26 new editions)

Björn Dunkerbeck & Lüderitz Speed Challenge


Back home on the island of Gran Canaria in the Canary Islands for just a few days, Björn Dunkerbeck is savoring the return to his family with a sense of accomplishment, as he has been one of the most prominent competitors on the Lüderitz Speed Challenge, which ended on November 28.
Indeed, 2 consecutive days, on November 16 and 18, the multiple world champion has warmed up the clock on the famous channel, beating for the first time his 2 personal records, 51.29 knots over 500 meters (against 51.09 in the past) and 53.82 knots in Vmax or 99.67 km/h to push the nail 48 hours later with a speed this time of 51.88 knots over 500 meters and a Vmax at 55.98 knots (103.67 km/h)!

Friday, December 3, 2021

Global ocean out of balance: humans appear to have broken a law of nature

 
From SciTechDaily by McGill Univ.

Industrial fishing over the past century appears to have broken a law of nature.

Surprising as it sounds, all life forms in the ocean, from small krill to large tuna, seem to obey a simple mathematical law that links an organism’s abundance to its body size.
For example, although small krill are individually only one billionth of the weight of a large tuna, they also tend to be a billion times more numerous throughout the oceans.
The idea, known as the Sheldon size spectrum theory, was first advanced in the 1970s, but has never been tested for a wide range of marine species and on a global scale until now.
An international research team, including researchers from McGill, found that not only does the theory appear to have once held true, but that this natural balance has now been drastically altered by widespread industrial fishing.


 All life forms in the ocean, from small krill to large tuna, seem to obey a simple mathematical law that links an organism’s abundance to its body size.
Credit: Max Planck Institute
 
In a study published recently in Science Advances, an international team involving researchers from McGill University, the Max Planck Institute for Mathematics in the Sciences in Germany, the Institut de Ciència i Tecnologia Ambientals in Spain, Queensland University of Technology in Australia and the Weizmann Institute of Science in Israel have found that when oceans were in a more pristine state (before the 20th century and the advent of wide-scale industrial fishing) the size spectrum theory appears to have held true.

“The fact that marine life is evenly distributed across sizes is remarkable,” says Eric Galbraith, the senior author on the paper and a professor in McGill’s Department of Earth and Planetary Sciences. “We don’t understand why it would need to be this way – why couldn’t there be much more small things than large things? Or an ideal size that lies in the middle? In that sense, the results highlight how much we don’t understand about the ecosystem.”

From bacteria to whales – finding a way to measure all marine life

To gain a picture of the current numbers across an unprecedented range of species, the researchers used diverse recent studies to construct a large global dataset of marine organisms, including bacteria, phytoplankton, zooplankton, fish, and mammals.
Their approach allowed them to differentiate the spatial distribution of 12 major groups of aquatic life over the entire ocean.

“It was challenging to find a way to adequately compare measurements of organisms that span such a massive difference in scale,” recalls Ian Hatton, the first author of the study and an Alexander von Humboldt research fellow at the Max Planck Institute. 
“While microscopic aquatic organisms could be estimated from more than 200,000 water samples collected across the globe, larger marine animals can swim across whole ocean basins and needed to be estimated using entirely different methods.”

The researchers also used historical reconstructions and marine ecosystem models to estimate marine biomass in pristine oceans (pre-20th century) and compared this data to the present-day.
They found that, despite exceptions at either extreme – whales and bacteria – there was once a remarkably constant biomass of approximately 1 gigaton over each order of magnitude range of body size.
This means that the total amount of life in the oceans between any size and a size ten-fold larger – for example, from 1 g to 10 g – always adds up to about 1 billion tons, regardless of the starting size.
But industrial fishing has significantly altered this picture.

Human impacts on marine biomass

In contrast with a nearly constant biomass spectrum in the pristine ocean, the researchers’ examination of the spectrum revealed a major impact of humanity on the distribution of biomass across the largest sizes.

While fishing accounts for less than 3 percent of human food consumption, its effects on the biomass spectrum have been devastating.
Large fish (meaning anything longer than 10 cm) have experienced a total biomass loss of roughly 2 Gigatons (a 60% reduction), dwarfing the 0.1 Gigatons that fishers catch every year.
Historically, whaling was even more devastating for the largest end of the biomass spectrum, with the largest whales suffering a 90% loss.
Indeed, the authors estimate that losses caused by industrial fishing and whaling over the past century are much greater than the potential biomass losses due to climate change scenarios over the next 80 years, even under pessimistic emissions scenarios.

“The biggest surprise, when viewed from this global perspective, was the huge inefficiency of fishing. When industrial fishing fleets go out and catch fish in the ocean, they aren’t acting like the large predatory fish, seals, or birds that they compete with, that just consume small quantities of the fish populations in a way that keeps the populations stable,” says Galbraith. 
“Humans have not merely replaced oceanic top-predators, but entirely altered the flow of energy throughout the marine ecosystem.”

He adds: “The good news is that we can reverse the imbalance we’ve created, by reducing the number of active fishing vessels around the world. Reducing overfishing will also help make fisheries more profitable and sustainable – it’s a potential win-win, if we can get our act together.”

For more on this research, read Humans Guilty of Breaking an Fundamental Oceanic Law of Nature.

Reference: “The global ocean size spectrum from bacteria to whales” by Ian A. Hatton, Ryan F. Heneghan, Yinon M. Bar-On and Eric D. Galbraith, 10 November 2021, Science Advances.
DOI: 10.1126/sciadv.abh3732


Links :