Posts Tagged 'video/audio'

State of the global climate 2024

Key messages

  • Key climate change indicators again reach record levels
  • Long-term warming (averaged over decades) remains below 1.5°C
  • Sea-level rise and ocean warming irreversible for hundreds of years
  • Record greenhouse gas concentrations combined with El Niño and other factors to drive 2024 record heat
  • Early warnings and climate services are vital to protect communities and economies

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The annually averaged global mean near-surface temperature in 2024 was 1.55 °C ± 0.13 °C above the 1850–1900 average. This is the warmest year in the 175-year observational record, beating the previous record set only the year before. While a single year above 1.5 °C of warming does not indicate that the long-term temperature goals of the Paris Agreement are out of reach, it is a wake-up call that we are increasing the risks to our lives, economies and the planet.

Over the course of 2024, our oceans continued to warm, sea levels continued to rise, and acidification increased. The frozen parts of Earth’s surface, known as the cryosphere, are melting at an alarming rate: glaciers continue to retreat, and Antarctic sea ice reached the second-lowest extent ever recorded. Meanwhile, extreme weather continues to have devastating consequences around the world.

In response, WMO and the global community are intensifying efforts to strengthen early warning systems and climate services to help decision-makers and society at large be more resilient to extreme weather and climate. We are making progress but need to go further and need to go faster. Only half of all countries worldwide have adequate multi-hazard early warning systems. This must change.

Investment in National Meteorological and Hydrological Services is more important than ever to meet the challenges and build safer, more resilient communities. Authoritative scientific information and knowledge is necessary to inform decision-making in our rapidly changing world, and this report provides the latest science-based update on the state of our knowledge of key climate indicators

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Ocean acidification experiment (text & video)

Why are our oceans turning acidic?

See why our oceans are turning acidic due to climate change.

This is an experiment which is hard to do at home and is best suited to laboratory conditions, where appropriate safety measures can be put in place. If you do not have the correct setting and equipment, we have produced a video of the experiment which you can find below. 

Equipment

  • 2l graduated cylinder
  • 2ml potassium hydroxide (1M) or sodium hydroxide (1M) 
  • 1l water
  • 25ml universal indicator
  • ~10g dry ice

Method

  1. Pour the water into the cylinder.
  2. Add the potassium hydroxide(KOH) or sodium hydroxide. (NaOH) to the cylinder to make a dilute base.
  3. Add 25ml of universal indicator to the cylinder. You should see the liquid turn blue/purple to reflect the basic pH. You will need to give the solution a stir.
  4. Now gently add the dry ice into the cylinder. You should see gas bubbles rising through the solution, vapour at the top and the solution change colour to an orange/red colour.

So, what is happening here?

Dry ice is solid CO2.

As the dry ice is dropped in the liquid, it sublimates, going from a solid directly to a gas. This gas bubbles through the liquid, and the vapours you can see at the top.

The CO2 reacts with the water in the solution producing hydrogen, H+, ions.

CO2 (g) + H20(l) → H2CO3 (aq) + 2H+(aq) + CO3 (aq)

The H+ ions produced, react with the hydroxide, OH, ions in the base, producing water and acting to neutralise the solution.

H+(aq) + OH(aq) → H2O(l)

However the universal indicator in solution ends up yellow, indicating the solution is a weak acid. This is because eventually there are no OH ions left, and instead unreacted H+ remain in the solution, turning it acidic.

Optional extra: while the dry ice is still bubbling, you can add more potassium hydroxide or sodium hydroxide to the top of the cylinder, one pipette-full at a time. You should see the liquid temporarily returning to its purple colour, but then changing to yellow again as the carbon dioxide bubbles through.

So how does this relate to climate change?

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What is the pH Scale | acids, bases & alkalis | chemistry (video)

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Ocean acidification (video)

Ocean acidification:

(a) The ocean carbonate system.
(b) Alkalinity, total CO2, pH.
(c) The effect of increasing atmospheric CO2 on ocean acidity and on calcium carbonate dissolution.
(d) Long-term decline of anthropogenic CO2
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The threat of ocean acidification: what you need to know (audio & video)

Ocean acidification is a topic that has been gaining more attention in recent years, and for good reason. It is a serious threat to the health and well-being of our oceans, and ultimately to the survival of countless species that call the ocean home.

In this video, we will explore what ocean acidification is, how it occurs, and the impacts it has on the environment. We will also discuss the primary drivers of ocean acidification, including the burning of fossil fuels and other human activities that release carbon dioxide into the atmosphere.

Through stunning visuals and clear explanations, we will delve into the science behind ocean acidification and why it is such a critical issue. We will also examine what steps can be taken to mitigate its effects and preserve the health of our oceans for future generations.

Whether you are a student, scientist, or concerned citizen, this video will provide a comprehensive overview of ocean acidification and its implications. Join us on this journey to understand one of the greatest challenges facing our planet today.

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GOA-ON webinar: mediterranean calcifying organisms under ocean acidification and warming (audio & video)

Dr. Chloe Carbonne (Laboratory of Oceanography of Villefranche, Sorbonne University, Villefranche-sur-Mer, France) and Maximiliano Szkope (University of Malaga, Malaga, Spain) will be presenting their work on calcifying organisms in the Mediterranean Sea under the effects of ocean acidification and warming.

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Ove Hoegh-Guldberg | coral reefs: from climate victims to survivors (video & text)

Prof Ove Hoegh-Guldberg was among the first to sound the alarm of the threat posed by ocean warming and acidification to marine ecosystems, following pioneering research into coral bleaching and mortality.

In his 29 November keynote at the Frontiers Forum, Ove gave an update on coral reef health globally and an outlook for the future. The session was attended by over 1,500 representatives from science, policy, and business across the world.

Ove’s talk was followed by a discussion with renowned coral scientists on how to protect and restore reefs so they flourish for centuries to come:

  • Prof Maoz Fine | Professor, Hebrew University of Jerusalem, Israel
  • Lisa Carne | Director/Founder, Fragments of Hope, Belize
  • Dr Nancy Knowlton | Sant Chair for Marine Science Emerita, Smithsonian National Museum of Natural History, USA

Ove led the team that revealed the molecular mechanisms of coral bleaching and developed the first projections of mass coral mortality. He heads global research, discussions, and action on the science and solutions to rapid climate change – including as Coordinating Lead Author for the ‘Oceans’ chapter for the Fifth Assessment report of the Intergovernmental Panel on Climate Change (IPCC) and Coordinating Lead Author on the ‘Impacts’ chapter of the IPCC Special Report on 1.5°C. He also conceived and led the innovative XL-Catlin Seaview Survey, which visually recorded the health of over 1,000 km of coral reefs across 25 countries. Ove is Professor of Marine Studies at the University of Queensland, Australia.

The Frontiers Forum showcases science-led solutions for healthy lives on a healthy planet. Watch previous sessions at https://forum.frontiersin.org

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Ocean acidification lessons: shell shifts (video)

Ocean Acidification Lessons: Shell Shifts

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Ocean acidification lessons: understanding oceans and coastal acidification (video)

Ocean Acidification Lessons: Understanding Oceans and Coastal Acidification
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Ocean acidification adaptation and resilience in Africa (video)

Coastal communities in many African countries rely heavily on the sea for economic, social, and nutritional services. Ocean acidification has the potential to negatively affect marine ecosystems important to these communities. The losses would be alarming for the African continent. The IAEA is working with local, regional and international partners to understand and undress potential impacts and solutions to ocean acidification in Africa.

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Behavioural responses of fish to high CO2/low pH conditions observed at natural analogues (video & text)

Prof Tim Ravasi and Dr Davide Spatafora present their research on how the molecular basis and behavioural adjustments reveal potential local adaptation to acidifying oceans, a lesson from natural analogues, the second webinar from the International CO2 Natural Analogues (ICONA) Network. The first response by animals to a changing environment is predominantly through modification of their behaviour. In this context, investigating behavioural responses of fish living under low-pH/high-CO2 conditions (e.g. off volcanic seep sites) may contribute to a better understanding of how marine species might adjust or adapt to environmental conditions under projected ocean change scenarios. We carried out field-based observations and translocation experiments in the Vulcano island natural CO2 seep (southern Italy) to assess whether there is evidence for local behavioural adaptation and/or acclimatization of fish after long and short-term exposure to ocean acidification conditions predicted to occur by the end of this century. The responses of two temperate fish species, characterized by a limited home range, have been investigated and compared between fish from low-pH/high pCO2 sites and fish from control sites. Furthermore, understanding the molecular underpinnings responsible for acclimatization to acidified waters, by means of an integrated study of the brain transcriptional program of wild fish species, can elucidate on the variation in responses. We collected 130 individuals of six different reef fish species from a natural volcanic CO2 seep and nearby control reefs in Papua New Guinea. Differences in brain gene expression in fish from CO2 seeps compared to fish from control sites as well as differences among species identified the molecular pathways controlling the cellular responses to elevated CO2. These studies provide a broader understanding as to the behavioural and molecular alterations crucial for coping with naturally elevated CO2 conditions.

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Symposium High CO2 – Lima (audio & video)

All presentations from the 5th International Symposium on the Ocean in a High CO2 World (13-16 September 2022) have been posted on the Symposium YouTube channel. All talks are labeled by day, room and theme of participation. The description of each video lists the presentations captured in each video. 

Plenary talks will always remain available indefinitely and other talks will be available for one month only.

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Two poles, one common future – Richard Bellerby: ocean acidification (video & text)

In a series of short video interviews, the Prince Albert II of Monaco Foundation together with its partners in The Polar Initiative – SCAR, IASC and the Oceanographic Institute of Monaco – invited polar scientists and specialists to give a voice to polar regions, calling for a greater protection of Arctic and Antarctic regions and for shedding a light on the benefit they represent for the Planet and Humanity.

Richard Bellerby, Director SKLEC-NIVA Centre for Marine and Coastal Climate Research, states that “ocean acidification is one of the biggest challenges that we have to date (…), that will cause the local if not total extinction of some crucial species within the ocean.” According to him, “we have get the message out”, to the media and to the general public, as it is happening faster than ever before.

Visit https://www.thepolarinitiative.org/ for more information.

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Emisión en directo de symposium high CO2 – Lima (video) (in Spanish)

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Emisión en directo de symposium high CO2 – Lima (video) (in Spanish)

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This is CDR ep.49: MRV for ocean-based CDR methods with Dr. Jessica Cross, NOAA (video & text)

In this episode of This Is CDR, OpenAir welcomes NOAA Research Oceanographer Dr. Jessica Cross to discuss the challenges associated with measurement, reporting, and verification (MRV) of ocean-based CDR methods, and how we can seek to address them in a climate-relevant time-frame.

About our Guest. – https://www.pmel.noaa.gov/people/dr-j…

Dr. Jessica N. Cross is a research oceanographer with the NOAA in Seattle, WA. Her current research focuses on carbon biogeochemistry and ocean acidification in Arctic regions, and especially along the Alaskan coast. The main goal is to better understand how acidification processes interact with natural biogeochemical cycles, and eventually to detect geochemical and biological impacts of acidification in marine systems. Dr. Cross conducts her research across a variety of platforms, including ship-based measurements, moorings, and mobile autonomous platforms like gliders and drones, through NOAA’s Innovative Technology for Arctic Exploration Program. She also broadly participates in the Arctic research community through the North American Carbon Program, the Ocean Carbon Biogeochemistry Program, the Pacific Arctic Group, and the Interagency Research Policy Committee collaboration teams.

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Emisión en directo de symposium high CO2 – Lima (video) (in Spanish)

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Emisión en directo de symposium high CO2 – Lima (video) (in Spanish)

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Ocean acidification monitoring and scientific research in the PI-TOA region (text & video)

This month’s webinar, “Ocean Acidification Monitoring and Scientific Research in the PI-TOA Region” was held on August 25, 11am Fiji. The webinar was moderated by Dr Kim Currie with presentations by Dr Antoine De Ramon N’Yeurt, Associate Professor Patila Amosa and Ms Luia Taise. The three speakers spanned topics such as establishing a pH time-series on the Suva reef, the effects of ocean acidification on organismal calcification such as corals and bryozoans, and the impacts on the photosynthetic physiology of a green seaweed. These research topics are important in understanding the impact of ocean acidification on coastal ecosystems of the Pacific.

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Francois Morel: the effect of ocean acidification on marine phytoplankton (text & video)

Francois Morel, Princeton University, presents “The Effect of Ocean Acidification on Marine Phytoplankton” at the Dreyfus Symposium on Environmental Chemistry. This symposium was held at the national meeting of the American Chemical Society on March 22, 2022.

For more information, visit: www.dreyfus.org.

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