NOAA's Response and Restoration Blog

An inside look at the science of cleaning up and fixing the mess of marine pollution


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Follow Along as NOAA Clears the Waters of the Northwestern Hawaiian Islands

Two people pull nets from the ocean into a small boat.

Two members of the NOAA dive team remove derelict fishing gear from a reef at Midway Atoll during the 2013 marine debris removal cruise. (NOAA)

Turquoise waters, vibrant coral reefs, white sand beaches—this is often what we think of when we think about far-off islands in the Pacific Ocean. But even the furthest reaches of wilderness, such as the tropical reefs, islands, and atolls of the Papahānaumokuākea Marine National Monument, which are hundreds of miles from the main Hawaiian archipelago, can be polluted by human influence. In these shallow waters, roughly 52 tons of plastic fishing nets wash up on coral reefs and shorelines each year.

For nearly two decades, NOAA has been leading an annual mission to clean up these old nets that can smother corals and entangle marine life, including endangered Hawaiian monk seals. This year, the NOAA Marine Debris Program has two staff—Dianna Parker and Kyle Koyanagi—joining the NOAA Pacific Islands Fisheries Science Center scientists and divers on board the NOAA Ship Oscar Elton Sette to document this effort.

A man pulls a net out of the ocean into a small boat.

Chief scientist Mark Manuel hauls derelict nets over the side of a small boat at Maro Reef during the 2014 expedition. (NOAA)

You can follow their journey to remove nets from five areas in the marine monument:

You can keep track of all things related to this expedition on the NOAA Marine Debris Program website.


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Celebrate and Protect the Ocean with us on World Ocean Day

Family exploring tidepools in Santa Cruz.

Learn about, explore, and protect your ocean — our ocean. (NOAA)

At NOAA’s National Ocean Service, we’re honoring all things ocean the entire month of June, but if you have only one day to spare, make it this weekend. Sunday, June 8 is World Ocean Day. As we commemorate this interconnected body of water which sustains our planet, consider how each of us can be involved in both celebrating and protecting the ocean.

To celebrate it, we suggest you learn something new about the ocean and share it with at least one friend (perhaps by sharing this blog post). Then, tell us which actions you’re taking to protect the ocean. We have a few examples to get you ready for both.

Learn to Love the Ocean

Did you know that …

You can learn even more about the ocean and coastal areas by visiting a National Marine Sanctuary or National Estuarine Research Reserve and getting a hands-on education.

Act to Protect the Ocean

Plastic water bottle floating in the ocean.

Don’t let this be your vision of World Ocean Day. Be part of the solution. (NOAA)

Now that you’re hopefully feeling inspired by our amazing ocean, you’re ready to do something to protect it from its many threats, such as ocean acidification (global warming’s oceanic counterpart), pollution, and habitat degradation. Here are some ways you can help:

The more we all know and care about the ocean, the more we will do to take care of it. Do your part this World Ocean Day and every day.


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Join the International Coastal Cleanup and Clean up a Beach Near You

Plastic bottle caps picked up from a beach on Midway Atoll.

Help pick up marine debris where you live on September 21 with the International Coastal Cleanup. Marine debris is a global problem, even for places like the middle of the U.S. or a remote Pacific island. The plastic bottle caps shown here were collected from Midway Atoll in the Northwestern Hawaiian Islands by NOAA Pacific Islands Fisheries Science Center. (NOAA)

Worried about the amount of trash on our coasts? Do gyres of bobbing plastic whirl through your head each night? Help wipe these worries from your mind and the beach by joining the International Coastal Cleanup on September 21, 2013.

With more than 550,000 volunteers scouring beaches, rivers, and lakes last year, this event is the biggest one-day cleanup of marine debris in the world. In the past, volunteers have turned up everything from bottle caps and plastic bags to toilet seats and cyborg sea-kitties. But each year cigarette butts take home the prize for most common item of debris found on the beach, with 2,117,931 of these toxic pieces of plastic turning up during the 2012 global cleanup alone.

To volunteer at a location near you, visit Ocean Conservancy online. The NOAA Marine Debris Program is a proud sponsor of the annual event, and last year NOAA volunteers cleaned up more than 2.8 tons (nearly 5,700 pounds) of debris from waterways and beaches in DC, Seattle, and Oahu.

Even if you can’t make it to your nearest waterway on September 21, you can still help reduce how much trash makes it to the ocean by planning your own beach cleanup and considering these 10 suggestions from Ocean Conservancy:

10 things you can do for trash free seas


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NOAA Lifts 14 Metric Tons of Fishing Nets and Plastics from Hawaiian Coral Reefs

NOAA Fisheries Biologist Matthew Parry also contributed to this post.

Lost or discarded fishing nets frequently get lodged on corals and smother or break the corals underneath them. Here, a diver removes them from a reef near Midway Atoll in the Northwestern Hawaiian Islands. (NOAA)

Lost or discarded fishing nets frequently get lodged on corals and smother or break the corals underneath them. Here, a diver removes them from a reef near Midway Atoll in the Northwestern Hawaiian Islands. (NOAA)

The sea life around Hawaii’s remote Midway Atoll is swimming easier after NOAA recently removed 14 metric tons of debris from its waters (a metric ton equals about 2,204 pounds). The removal team, consisting of members of the NOAA Coral Reef Ecosystem Division, spent 19 days collecting debris both from along the shoreline and in the water around Midway Atoll in the Northwestern Hawaiian Islands. As usual, the bulk of the items recovered were abandoned fishing gear and plastics.

During the 2013 cruise, the NOAA team discovered and hauled away a 23-foot-long boat that was confirmed to have been washed away from Japan during the 2011 earthquake and tsunami. (NOAA)

During the 2013 cruise, the NOAA team discovered and hauled away a 23-foot-long boat that was confirmed to have been washed away from Japan during the 2011 earthquake and tsunami. (NOAA)

Notably, the team also removed a 23-foot-long derelict vessel weighing close to three-quarters of a metric ton. This vessel was confirmed as having been lost from Japan during the 2011 earthquake and resulting tsunami. (Learn more about marine debris from the tsunami.)

This current round of marine debris removal efforts began in 2011 when a plan was put in place to help restore the environment injured after the research ship M/V Casitas ran aground on the coral reefs of Pearl and Hermes Atoll in 2005. This atoll is located in the Northwestern Hawaiian Islands in what is now the Papahanaumokuakea Marine National Monument. Our office, along with our partners, undertook a Natural Resource Damage Assessment for this ship grounding. This process resulted in a legal settlement which provided NOAA with funds to conduct marine debris removal projects over several summers, starting in 2011. The 2011 efforts removed 15 metric tons of marine debris while the 2012 cruise brought in 52 metric tons. Since 2011, NOAA has collected a total of 81 metric tons or 178,000 pounds of debris from the Northwestern Hawaiian Islands.

The 2013 NOAA team collected 14 metric tons of fishing gear, plastic, and other debris from the shoreline and waters around Midway Atoll. (NOAA)

The 2013 NOAA team collected 14 metric tons of fishing gear, plastic, and other debris from the shoreline and waters around Midway Atoll. (NOAA)

Marine debris, particularly discarded and lost fishing gear, is a substantial source of coral damage in the Papahanaumokuakea Marine National Monument. Fishing nets frequently get lodged on corals and smother or break the corals underneath them. NOAA and our partners determined that removing nets from coral reefs in this area would prevent similar injuries to corals as those that occurred during the M/V Casitas grounding and subsequent response.

Learn more about efforts to restore coral reefs after this ship grounding [PDF].


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Taking a Closer Look at Marine Debris in Your Backyard

Here's hoping your backyard doesn't look like this: debris scattered on the ocean floor near the Pacific Islands. (NOAA)

Here’s hoping your backyard doesn’t look like this: debris scattered on the ocean floor near the Pacific Islands. (NOAA)

Check out NOAA’s Marine Debris Blog for their ongoing series, Marine Debris in Your Backyard, which examines the unique challenges of marine debris and its impacts on various parts of the United States.

Join them as they “journey across the nation, looking at the nine different regions the NOAA Marine Debris Program spans and the most common types of debris found in them, and how it may have ended up there.”

So far, they have visited the following places:

  • Alaska, where remote beaches, rough seas, and limited fair weather mean volunteers have only a few months each year to remove anywhere from one to 25 tons of debris per mile of shoreline.
  • Great Lakes, where 21 percent of the world’s surface fresh water resides, discarded fishing lines often entangle wildlife, and rumors of a plastic-filled “garbage patch” are beginning to appear.
  • Pacific Islands, where Hawaii, Guam, American Samoa, the Commonwealth of the Northern Mariana Islands, and a whole lot of open ocean make up the largest region NOAA supports, but where there is so little space for landfills that NOAA helped establish a public-private partnership in Hawaii to turn abandoned fishing gear into a local electricity source.
  • California, where its 1,100 miles of shoreline vary from coastal mountains in the north to well-populated, sandy beaches in the south, and where the nation’s first “Trash Policy” will attempt to control the flow of garbage in California’s waterways.

Stay tuned as they continue working their way around the shores of the United States, and ask yourself, what does marine debris look like where you live? How do you help keep it out of the ocean?

And remember, even if you live hundreds of miles from a beach, a piece of litter such as a cigarette butt (which actually contains plastic) or a plastic bag can still make its way through storm drains and rivers to the ocean. This makes marine debris, no matter where you live, truly everyone’s problem.


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Is There a Garbage Patch in the Great Lakes?

This is a post by Sarah Opfer, NOAA Marine Debris Program Great Lakes Regional Coordinator.

Plastic debris in the form of fragments, bottle caps, food packaging, and smoking products are commonly found on Great Lake beaches. Here, marine debris has washed up at Maumee Bay State Park on the shores of Lake Erie. (NOAA Marine Debris Program)

Plastic debris in the form of fragments, bottle caps, food packaging, and smoking products are commonly found on Great Lake beaches. Here, marine debris has washed up at Maumee Bay State Park on the shores of Lake Erie. (NOAA Marine Debris Program)

The “Great Pacific Garbage Patch“—a purported island of trash twice the size of Texas floating in the Pacific Ocean—receives a lot of media attention. Recent reports suggest that a similar garbage patch may be developing in the Great Lakes as well.

However, based on research we know that the name “garbage patch” is misleading and that there is no island of trash forming in the middle of the ocean. We also know that there is no blanket of marine trash that is visible using current satellite or aerial photography.

Plastic debris is found in Great Lake waters as well. This debris was pulled from a Lake Erie marina during a cleanup. (NOAA Marine Debris Program)

Plastic debris is found in Great Lake waters as well. This debris was pulled from a Lake Erie marina during a cleanup. (NOAA Marine Debris Program)

Yet, there are places in the ocean where currents bring together lots and lots of floatable materials, such as plastics and other trash. While the types of litter gathering in these areas can vary greatly, from derelict fishing nets to balloons, the kind that is capturing the most attention right now are microplastics. These are small bits of plastic often not immediately evident to the naked eye.

While we know about the so-called “garbage patches” in the Pacific Ocean, could there be a similar phenomenon in other parts of the world, including the Great Lakes? Recent research on the distribution of plastics in the Great Lakes has people now asking that very question.

The Great Lakes are no mere group of puddles. They contain nearly 20% of the world’s surface freshwater and have a coastline longer than the East Coast of the United States. Within the Great Lakes system, water flows from Lake Superior and Lake Michigan, the lakes furthest west and highest in elevation, east into Lake Huron. From there, it travels through Lake St. Clair and the Detroit River into Lake Erie. Then, some 6 million cubic feet of water pass over Niagara Falls each minute and into Lake Ontario before flowing through the St. Lawrence River and into the Atlantic Ocean.

Average summer water circulation patterns in the Great Lakes. Beletsky et al. 1999 (NOAA Great Lakes Environmental Research Laboratory)

Average summer water circulation patterns in the Great Lakes. Beletsky et al. 1999 (NOAA Great Lakes Environmental Research Laboratory)

This water flow influences circulation patterns within and between each of the lakes. Currents within the Great Lakes also are powered by wind, waves, energy from the sun, water density differences, the shape of the lakebed, and the shoreline. These circulation currents have the tendency to create aggregations of garbage and debris in certain areas, just like in the oceans. But, just as in the Pacific Ocean, this doesn’t mean the Great Lakes have floating trash islands either.

In an effort to better identify and understand how plastic debris is spread throughout the Great Lakes, researchers at the University of Waterloo in Canada have partnered with COM DEV on an exploratory research project. COM DEV is a designer and manufacturer of space and remote sensing technology. Researchers are working with this industry partner to develop and test the ability of different remote sensors to detect plastics in the Great Lakes.

If they find the task is feasible and the trial runs prove to be effective, this work could be applied beyond the Great Lakes and across the United States. The NOAA Marine Debris Program, part of the Office of Response and Restoration, is engaged with and following the project. We plan to participate in the next steps of this promising effort. You can learn more about the project and a related workshop on plastic pollution in the Great Lakes.

Sarah Opfer

Sarah Opfer

Sarah Opfer received her bachelor’s and master’s degrees in biology from Bowling Green State University and was a Knauss Sea Grant fellow with NOAA in 2009. She is based in Ohio and enjoys having Lake Erie in her back yard! While away from work she enjoys cooking, reading, kayaking, dreaming of places she wants to travel to, and spending time with her family.


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Where Are the Pacific Garbage Patches Located?

Microplastics in sand.

Microplastics, small plastics less than 5 millimeters long, are an increasingly common type of marine debris found in the water column (including the “garbage patches”) and on shorelines around the world. Based on research to date, most commonly used plastics do not fully degrade in the ocean and instead break down into smaller and smaller pieces. (NOAA Marine Debris Program)

The Pacific Ocean is massive. It’s the world’s largest and deepest ocean, and if you gathered up all of the Earth’s continents, these land masses would fit into the Pacific basin with a space the size of Africa to spare.

While the Pacific Ocean holds more than half of the planet’s free water, it also unfortunately holds a lot of the planet’s garbage (much of it plastic). But that trash isn’t spread evenly across the Pacific Ocean; a great deal of it ends up suspended in what are commonly referred to as “garbage patches.”

A combination of oceanic and atmospheric forces causes trash, free-floating sea life (for example, algae, plankton, and seaweed), and a variety of other things to collect in concentrations in certain parts of the ocean. In the Pacific Ocean, there are actually a few “Pacific garbage patches” of varying sizes as well as other locations where marine debris is known to accumulate.

The Eastern Pacific Garbage Patch (aka “Great Pacific Garbage Patch”)

In most cases when people talk about the “Great Pacific Garbage Patch,” they are referring to the Eastern Pacific garbage patch. This is located in a constantly moving and changing swirl of water roughly midway between Hawaii and California, in an atmospheric area known as the North Pacific Subtropical High.

NOAA National Weather Service meteorologist Ted Buehner describes the North Pacific High as involving “a broad area of sinking air resulting in higher atmospheric pressure, drier warmer temperatures and generally fair weather (as a result of the sinking air).”

This high pressure area remains in a semi-permanent state, affecting the movement of the ocean below. “Winds with high pressure tend to be light(er) and blow clockwise in the northern hemisphere out over the open ocean,” according to Buehner.

As a result, plastic and other debris floating at sea tend to get swept into the calm inner area of the North Pacific High, where the debris becomes trapped by oceanic and atmospheric forces and builds up at higher concentrations than surrounding waters. Over time, this has earned the area the nickname “garbage patch”—although the exact content, size, and location of the associated marine debris accumulations are still difficult to pin down.

Map of ocean currents, features, and areas of marine debris accumulation (including "garbage patches") in the Pacific Ocean.

This map is an oversimplification of ocean currents, features, and areas of marine debris accumulation (including “garbage patches”) in the Pacific Ocean. There are numerous factors that affect the location, size, and strength of all of these features throughout the year, including seasonality and El Nino/La Nina. (NOAA Marine Debris Program)

The Western Pacific Garbage Patch

On the opposite side of the Pacific Ocean, there is another so-called “garbage patch,” or area of marine debris buildup, off the southeast coast of Japan. This is the lesser known and studied, Western Pacific garbage patch. Southeast of the Kuroshio Extension (ocean current), researchers believe that this garbage patch is a small “recirculation gyre,” an area of clockwise-rotating water, much like an ocean eddy (Howell et al., 2012).

North Pacific Subtropical Convergence Zone

While not called a “garbage patch,” the North Pacific Subtropical Convergence Zone is another place in the Pacific Ocean where researchers have documented concentrations of marine debris. A combination of oceanic and atmospheric forces create this convergence zone, which is positioned north of the Hawaiian Islands but moves seasonally and dips even farther south toward Hawaii during El Niño years (Morishige et al., 2007, Pichel et al., 2007). The North Pacific Convergence Zone is an area where many open-water marine species live, feed, or migrate and where debris has been known to accumulate (Young et al. 2009). Hawaii’s islands and atolls end up catching a notable amount of marine debris as a result of this zone dipping southward closer to the archipelago (Donohue et al. 2001, Pichel et al., 2007).

But the Pacific Ocean isn’t the only ocean with marine debris troubles. Trash from humans is found in every ocean, from the Arctic (Bergmann and Klages, 2012) to the Antarctic (Eriksson et al., 2013), and similar oceanic processes form high-concentration areas where debris gathers in the Atlantic Ocean and elsewhere.

You can help keep trash from becoming marine debris by (of course) reducing, reusing, and recycling; by downloading the NOAA Marine Debris Tracker app for your smartphone; and by learning more at http://marinedebris.noaa.gov.

Carey Morishige, Pacific Islands regional coordinator for the NOAA Marine Debris Program, also contributed to this post.

Literature Cited

Bergmann, M. and M. Klages. 2012. Increase of litter at the Arctic deep-sea observatory HAUSGARTEN. Marine Pollution Bulletin, 64: 2734-2741.

Donohue, M.J., R.C. Boland, C.M. Sramek, and G.A Antonelis. 2001. Derelict fishing gear in the Northwestern Hawaiian Islands: diving surveys and debris removal in 1999 confirm threat to coral reef ecosystems. Marine Pollution Bulletin, 42 (12): 1301-1312.

Eriksson, C., H. Burton, S. Fitch, M. Schulz, and J. van den Hoff. 2013. Daily accumulation rates of marine debris on sub-Antarctic island beaches. Marine Pollution Bulletin, 66: 199-208.

Howell, E., S. Bograd, C. Morishige, M. Seki, and J. Polovina. 2012. On North Pacific circulation and associated marine debris concentration. Marine Pollution Bulletin, 65: 16-22.

Morishige, C., M. Donohue, E. Flint, C. Swenson, and C. Woolaway. 2007. Factors affecting marine debris deposition at French Frigate Shoals, Northwestern Hawaiian Islands Marine National Monument, 1990-2002. Marine Pollution Bulletin, 54: 1162-1169.

Pichel, W.G., J.H. Churnside, T.S. Veenstra, D.G. Foley, K.S. Friedman, R.E. Brainard, J.B. Nicoll, Q. Zheng and P. Clement-Colon. 2007. Marine debris collects within the North Pacific Subtropical Convergence Zone [PDF]. Marine Pollution Bulletin, 54: 1207-1211.

Young L. C., C. Vanderlip, D. C. Duffy, V. Afanasyev, and S. A. Shaffer. 2009. Bringing home the trash: do colony-based differences in foraging distribution lead to increased plastic ingestion in Laysan albatrosses? PLoS ONE 4 (10).

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