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My experience with teaching geophysics to high-school students

It all started with a rather inconspicuous email with the subject title: Do you fancy primary schools? I got quite confused. Why would I get such a message? I am not a teacher. Hmm. Luckily, I decided to read the email anyway. It said something about a program called Rent-A-Scientist. I was still confused, since I am not a scientist, yet. Hmm. Luckily, I decided to read further. There it was: Kiel-Region would be enourmously happy to find some university students that would like to present exciting topics of their choice to pupils at schools. Hmm. I am a university student!

So I answered that email, asked questions about how that would work and what I would have to do exactly. And the people from the Kiel-Region association and also from the center for key-skills at the university have been so friendly and encouraging, that finally I was sure: I will do it. I don’t want to miss this experience.

But what should I talk about? Which should be the topic of my choice? The final idea struck me, when I was once again trying to explain my study program to someone. People usually have funny ideas what geophysicists are doing, usually quite far from reality. But now, for once, I had the opportunity to improve that and tell a bunch of young people in one stroke about what geophysics is from my perspective. I collected subtopics and pictures, created some slides and invented some interactive exercises. Then, for the application process, I needed to describe my topic and content in an online form, which I did very thoroughly with many important (and maybe a little exaggerated) key words like energy supply, sustainability, climate change, civil protection, future strategies…. That must catch the teachers who will select my offer, I thought. As soon as I was finished, I could read what the other scientists (or students) had written. It was so much more appealing! They made their topics exciting, they wrote it as a narrative, more like a thrilling short story with an open end. I almost lost hope that anyone would book my offer which sounded so serious and boring compared to that. (Besides, they cut out my nice portrait on the research vessel with the sea and sunshine in background, took only the foreground (=me with an ugly helmet) and made it black-and-white, which looked … strange.)

As you might have expected, schools did choose my offer (otherwise I wouldn’t have been able to write this article). And they were three! Three 9th grade classes on high schools in Kiel. Communication with the physics teachers went well and we chose a convenient time and place. I asked for magnets, paper cards, felt-tip pens and the blackboard to prepare, as well as a computer with a projector to open my presentation.

The days came and apart from some technical issues (as usual) it went quite well. In general, the students were attentive, they raised their hands when I asked something and we had some nice discussions. I noticed that my presentation was far too long for the 45-minutes time slot at the first school, but luckily I had more time in the other cases. Sometimes, it was a bit loud as the students discussed with their chair neighbors and I didn’t know how to get their attention back. That is probably what makes the education and experience of a teacher. But with the next beautiful picture I had them focused again. What really was fun for me were the discussions that went so differently at the different schools. Once, we brainstormed what we could maybe find beneath the schoolyard with geophysical methods (catacombs and death bodies?? I aimed more for example for salt or ground water). Or when I asked everyone to say one important thing that we need metal for: …, headphones, jewellery, braces for teeth?! Of course the most important things.

All in all it was a positive experience for me. I believe, I got some more students interested in geophysics or its subtopics, everyone was nice and respectful, I saw some exceptional school architecture from the inside, and everyone learned something. At the very least, I did!

Julia Knüppel

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Ocean Acidification

Plastic Pollution’s Toll on Seabirds

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This blog was co-written by Dan Berkson and Hannah De Frond. Hannah works with Ocean Conservancy and the University of Toronto Trash Team to manage the International Trash Trap Network (ITTN), a global network of local groups using trash traps to increase cleanup efforts, engage communities and inform upstream solutions.

Plastic pollution devastates our ocean, and its impact on marine wildlife—especially seabirds—is severe and far-reaching. Seabirds breed on land but search for food at sea, bringing them into frequent contact with plastic pollution accumulating both along shores and in surface waters worldwide. Unfortunately, ingesting plastics can prove to be deadly for these amazing animals.

Eating plastics for seabirds can obstruct their digestive systems, preventing them from eating actual food, and leading to starvation. Sometimes it takes only one piece of plastic to block the passage of food. Plastic ingestion has been found in every family of seabird. Below are details on how some species are uniquely impacted by plastic pollution.

Seabirds Northern Fulmar

Seabirds Laysan Albatross

  • Petrel: More than 50% of petrel species are listed as “threatened” or “near threatened” by the International Union for Conservation of Nature (IUCN). Petrels often inhabit areas with high concentrations of plastic pollution such as the high seas and mid-ocean gyres. Unlike other seabirds, they struggle to regurgitate plastic. This means the plastics they ingest tend to remain in their bodies for extended periods. 
Seabirds Petrel

What can you do?

If we fail to take action, studies predict that 99% of seabird species will ingest plastic by 2050, which is devasting given how vulnerable seabirds are to even the smallest amount of plastic. Ocean Conservancy is committed to protecting our ocean, wildlife and communities from plastic pollution. But we can’t do it alone. Here is how you can join the fight: 

  • Reduce plastic use: To tackle our plastic pollution crisis, we need to use less plastic. We can each do our part by avoiding single-use plastics where possible in our daily lives from carrying a reusable water bottle and bag to skipping a straw. These small actions add up and collectively reduce the amount of plastic waste we create, while sending a clear signal to plastic producers that we are fed up with single-use plastics. 
  • Clean up plastic pollution before it enters the ocean: Cleaning up plastic waste, whether on the beach, along a river, or in your neighborhood park, helps eliminate the likelihood that it will later be consumed by seabirds or other marine life. One of the best ways to do this is by joining the International Coastal Cleanup® (ICC). Use our map to find a coordinator planning a cleanup in your region. Want something closer to home? Team up with friends and family to clean up your favorite beach or beloved park. If you see plastic on beaches, shores or elsewhere, remember to clean it up—it could save a seabird’s life.

The post Plastic Pollution’s Toll on Seabirds appeared first on Ocean Conservancy.

Plastic Pollution’s Toll on Seabirds

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Ocean Acidification

Learnings from the National Working Waterfronts Networks Conference

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I recently represented Ocean Conservancy at the National Working Waterfronts Network Conference in San Diego. The conference brought together maritime industry leaders, policymakers and community advocates, all working toward a shared vision for the future of our waterfronts.

As an engineer, former mariner and ocean conservationist I know that decarbonizing our ports requires cross-sector partnerships. The discussions throughout the National Working Waterfronts Network Conference reinforced how essential it is to bring together experts from engineering, policy and workforce development to drive meaningful change towards port decarbonization.

Throughout the conference, I discussed the need for a comprehensive, systems-level approach that integrates infrastructure investment, regulatory alignment and workforce development. Preparing the workforce for decarbonization is just as crucial as deploying zero-emission technologies. Investments in training programs and workforce development initiatives will equip maritime professionals with the expertise needed for the next generation of sustainable shipping. Collaboration among industry, government and educational institutions should also be used to create comprehensive training programs that align with emerging port technologies and regulatory requirements.

WOLF electric tug

Another highlight of the conference was seeing the eWolf. Designed by the marine company Cowley, the eWolf is the first fully electric tug in the United States. This cutting-edge vessel is 82 feet long and has a 70-ton bollard pull. It is powered by a 6-megawatt-hour battery system that eliminates emissions, equipped with onboard energy management systems to optimize power use and fitted with azimuth thrusters for enhanced maneuverability. This vessel drastically reduces harmful pollutants like nitrogen oxides, sulfur oxides and particulate matter, improving air quality for nearby communities while maintaining the performance required for commercial operations. It takes bold industry players like Crowley to lead the way toward port decarbonization—and, let’s be honest, eWolf is just a cool name.

WOLF electric tug

I left the National Working Waterfronts Network Conference with a deeper appreciation for the professionals working to ensure our waterfronts remain vibrant, resilient and sustainable. The challenge ahead is clear: How do we scale these innovations while maintaining the economic viability of our ports and coastal industries?

The answer lies in open collaboration among industry leaders, policymakers and communities, accelerated adoption of zero-emission technologies, strategic investments in clean-energy infrastructure and bold decision-making prioritizing sustainability and economic growth. That’s why Ocean Conservancy is spearheading projects like the Green Ports Interactive Funding Tracker—an innovative resource that aims to empower port authorities, environmental managers and sustainability experts by providing real-time updates and comprehensive insights into available funding.

Now is the time to turn conversations into action. Ocean Conservancy is committed to working alongside partners across the maritime industry to drive a cleaner, more sustainable future. Take action now to help Ocean Conservancy address today’s biggest threats to our ocean, including the climate crisis and plastic pollution.

The post Learnings from the National Working Waterfronts Networks Conference appeared first on Ocean Conservancy.

Learnings from the National Working Waterfronts Networks Conference

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Ocean Acidification

The Truth About Plastic Fragments

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This blog was written by Hannah De Frond. Hannah works with Ocean Conservancy and the University of Toronto Trash Team to manage the International Trash Trap Network (ITTN), a global network of local groups using trash traps to increase cleanup efforts, engage communities and inform upstream solutions.

During coastal cleanup events, no matter where you are in the world, chances are you’ll encounter plastic items like bottles, bottle caps, straws and packaging. However, plastic fragments that are smaller and more difficult to see may be difficult to see within the sand or soil.

Plastic fragments are small hard pieces of plastic, typically formed as larger plastic items that break up in the environment. As plastics are exposed to sunlight, waves and winds, they become brittle, crack and break into pieces. With each item of plastic that enters the environment, there is the potential for it to break into hundreds or even thousands of fragments. Due to its small, lightweight nature, each fragment moves differently in the environment and can have a totally different fate. Some fragments get washed into the ocean and float on the surface or sink to the ocean floor, some become buried in a sandy beach, and some are blown further afield with strong winds.

Plastic fragments are found in many environments, including lakes, rivers, terrestrial sediments and coastal marine environments. Plastic fragments are removed each year in the “tiny trash” collected during Ocean Conservancy’s International Coastal Cleanup®. They are among the top 10 items reported by groups in the International Trash Trap Network, an initiative co-led by Ocean Conservancy and the University of Toronto Trash Team, using technologies to clean up our waterways. 

One study in Brazil found 2,661 fragments in a 100-meter section of beach. Plastic fragments are also frequently reported in studies of plastic ingestion by wildlife such as fishseabirds and turtles. Ingested plastic fragments can cause tissue damage and inflammation and can concentrate harmful chemical pollutants which have the potential to leach out inside the gut, negatively impacting animal health. 

Just like other large plastic items, plastic fragments also undergo environmental weathering which causes them to break apart into even smaller pieces—microplastics (<5mm) and eventually into nanoplastics (<100nm). These micro- and nano-sized fragments are frequently found in the environment and, due to their size, are easily ingested by wildlife. One analysis of scientific research to date revealed that fragments are ingested by 19% of fish globally


To reduce plastic fragment pollution, we need to tackle the problem at the source by reducing the production and use of larger plastic items, like single-use plastics, from which fragments are generated. This includes commonly used polluting items like plastic bottles, straws, food containers, cups and plates. By reducing our plastic waste, reusing as much as possible and recycling when possible, we can, collectively, have a huge impact.

Both Ocean Conservancy and the University of Toronto are deeply committed to ridding our ocean and planet of insidious and harmful plastic pollution through efforts like the International Trash Trap Network and the International Coastal Cleanup. Please join us in ensuring that our ocean and waterways are not overrun by microplastics or any form of plastic pollution.

The post The Truth About Plastic Fragments appeared first on Ocean Conservancy.

The Truth About Plastic Fragments

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