60 acast.com Ultramarine: the science of our oceans and waterways https://connectsci.au/news en ConnectSci Ocean,Rivers,Waterways,Marine ConnectSci Dive into science

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]]> false ConnectSci info+693101a3fb6ea8e37846b815@mg-eu.acast.com 693101a3fb6ea8e37846b815 ultramarine-the-science-of-our-oceans-and-waterways episodic https://assets.pippa.io/shows/693101a3fb6ea8e37846b815/1765430511571-67e7e752-8d11-4ef7-a7de-b3fef09cf896.jpeg https://connectsci.au/news Ultramarine: the science of our oceans and waterways d0a51af0-d67e-11f0-8fc3-394ef4b875c4 4500m deep: remote observatory expands climate knowledge 4500m deep: remote observatory expands climate knowledge Mon, 23 Mar 2026 00:01:58 GMT 31:08 69c0788d7878605e1146659c false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/4500-metres-under-the-sea 69c0788d7878605e1146659c 693101a3fb6ea8e37846b815 4500-metres-under-the-sea Ocean and marine science full 1 13 David Boldeman speaks with CSIRO marine biogeochemist Dr Elizabeth Shadwick about one of Australia’s most important long-running ocean climate observation programs, the Southern Ocean Time Series south of Tasmania.


Anchored in waters around 4500 metres deep, this remote ocean observatory allows scientists to measure how the Southern Ocean absorbs heat and carbon dioxide from the atmosphere, and how these processes influence the global climate system.


Dr Shadwick explains how carbon dioxide moves from the air into the ocean, how physical circulation and deep water formation can store that carbon away from the atmosphere for decades to centuries, and how the “biological carbon pump” helps move organic carbon into the deep ocean.


The episode also explores the remarkable engineering effort required to deploy and maintain deep-water moorings in harsh Southern Ocean conditions, and what more than two decades of observations are revealing about ocean acidification, natural variability, and the challenge of detecting long-term human impacts in deep ocean ecosystems.


Further reading:


For the latest science news visit https://connectsci.au/news


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]]> David Boldeman speaks with CSIRO marine biogeochemist Dr Elizabeth Shadwick about one of Australia’s most important long-running ocean climate observation programs, the Southern Ocean Time Series south of Tasmania.


Anchored in waters around 4500 metres deep, this remote ocean observatory allows scientists to measure how the Southern Ocean absorbs heat and carbon dioxide from the atmosphere, and how these processes influence the global climate system.


Dr Shadwick explains how carbon dioxide moves from the air into the ocean, how physical circulation and deep water formation can store that carbon away from the atmosphere for decades to centuries, and how the “biological carbon pump” helps move organic carbon into the deep ocean.


The episode also explores the remarkable engineering effort required to deploy and maintain deep-water moorings in harsh Southern Ocean conditions, and what more than two decades of observations are revealing about ocean acidification, natural variability, and the challenge of detecting long-term human impacts in deep ocean ecosystems.


Further reading:


For the latest science news visit https://connectsci.au/news


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]]> How do you give a whale a hearing test? How do you give a whale a hearing test? Fri, 20 Mar 2026 02:59:29 GMT 18:23 69bcb8113bbfcfe8db37ef99 false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/how-do-you-give-a-whale-a-hearing-test 69bcb8113bbfcfe8db37ef99 693101a3fb6ea8e37846b815 how-do-you-give-a-whale-a-hearing-test Ocean and marine science full 1 12 Host David Boldeman speaks with ConnectSci science journalist Imma Perfetto about new research that has, for the first time, measured the hearing range of humpback whales in the wild.


The discussion explores why understanding whale hearing is critical, particularly because whales rely heavily on sound for communication, navigation and finding food in the dark ocean environment.


Imma explains that studying Baleen Whale hearing has long been difficult since these massive animals cannot be kept in captivity. This means scientists previously relied on indirect estimates based on anatomy and vocalisation patterns.


Discover how researchers overcame this challenge by adapting a behavioural hearing test used for human infants, broadcasting sound signals to migrating humpback whales off the Queensland coast and observing changes in their behaviour.


For the latest research and discoveries visit https://connectsci.au/news


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]]> Host David Boldeman speaks with ConnectSci science journalist Imma Perfetto about new research that has, for the first time, measured the hearing range of humpback whales in the wild.


The discussion explores why understanding whale hearing is critical, particularly because whales rely heavily on sound for communication, navigation and finding food in the dark ocean environment.


Imma explains that studying Baleen Whale hearing has long been difficult since these massive animals cannot be kept in captivity. This means scientists previously relied on indirect estimates based on anatomy and vocalisation patterns.


Discover how researchers overcame this challenge by adapting a behavioural hearing test used for human infants, broadcasting sound signals to migrating humpback whales off the Queensland coast and observing changes in their behaviour.


For the latest research and discoveries visit https://connectsci.au/news


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]]> How is ocean temperature measured? How is ocean temperature measured? Mon, 16 Mar 2026 22:26:01 GMT 21:32 69b7354c19edd9d9c9c78f90 false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/how-is-ocean-temperature-measured 69b7354c19edd9d9c9c78f90 693101a3fb6ea8e37846b815 how-is-ocean-temperature-measured Ocean and marine science full 1 11 David Boldeman is joined by science journalist Ellen Phiddian to explore a deceptively simple question: how do scientists actually know the oceans are warming?


The conversation unpacks the global network of measurements that allow researchers to track heat across the world’s oceans, from early ship-based observations to modern satellite systems and autonomous Argo floats that dive thousands of metres beneath the surface.


Along the way, the episode explains why ocean heat content is one of the most important indicators of climate change, how scientists distinguish long-term warming from natural variability, and why the oceans absorb the vast majority of the excess heat in the Earth’s climate system.


It is a story about evidence, measurement and the remarkable ability of modern science to take the temperature of a changing planet.


For the latest research and discoveries visit https://connectsci.au/news



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]]> David Boldeman is joined by science journalist Ellen Phiddian to explore a deceptively simple question: how do scientists actually know the oceans are warming?


The conversation unpacks the global network of measurements that allow researchers to track heat across the world’s oceans, from early ship-based observations to modern satellite systems and autonomous Argo floats that dive thousands of metres beneath the surface.


Along the way, the episode explains why ocean heat content is one of the most important indicators of climate change, how scientists distinguish long-term warming from natural variability, and why the oceans absorb the vast majority of the excess heat in the Earth’s climate system.


It is a story about evidence, measurement and the remarkable ability of modern science to take the temperature of a changing planet.


For the latest research and discoveries visit https://connectsci.au/news



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]]> The first Arctic explorers: ancient communities thrived in harsh environments The first Arctic explorers: ancient communities thrived in harsh environments Thu, 12 Mar 2026 03:02:40 GMT 16:05 69b224f7bba705d7aa4e434e false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/arctic-explorers 69b224f7bba705d7aa4e434e 693101a3fb6ea8e37846b815 arctic-explorers Ocean and marine science full 1 10 Four and a half thousand years ago, people were already navigating the dangerous waters of the High Arctic.


In this episode of the ConnectSci Podcast Ultramarine series, David Boldeman speaks with journalist Evrim Yazgin about new research showing how ancient Arctic communities crossed open ocean, thrived in extreme environments, and even helped shape the ecosystems around them.


For the latest science news visit connectsci.au/news

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]]> Four and a half thousand years ago, people were already navigating the dangerous waters of the High Arctic.


In this episode of the ConnectSci Podcast Ultramarine series, David Boldeman speaks with journalist Evrim Yazgin about new research showing how ancient Arctic communities crossed open ocean, thrived in extreme environments, and even helped shape the ecosystems around them.


For the latest science news visit connectsci.au/news

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]]> <![CDATA[Earth's alien ocean]]> Tue, 10 Mar 2026 04:47:30 GMT 14:58 69aa1614c2eb2fc3abfcf823 false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/earths-alien-ocean 69aa1614c2eb2fc3abfcf823 693101a3fb6ea8e37846b815 earths-alien-ocean Ocean and marine science full 1 9 We travel nearly ten kilometres beneath the surface of our own planet to explore one of the most extraordinary discoveries in modern science.


For decades, the search for extraterrestrial life has focused on distant planets and far-off stars. But some of the most compelling clues may be hiding in the deepest trenches of Earth’s oceans. In total darkness, under crushing pressure and without any sunlight, scientists have discovered thriving ecosystems powered not by light, but by chemistry.


Host David Boldeman and ConnectSci journalist Evrim Yazgin unpack how these deep-sea organisms survive using chemosynthesis, breaking down chemicals like hydrogen instead of relying on photosynthesis.


READ MORE: https://connectsci.au/news/news-parent/6784/Clues-to-extraterrestrial-life-found-in-deep-sea



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]]> We travel nearly ten kilometres beneath the surface of our own planet to explore one of the most extraordinary discoveries in modern science.


For decades, the search for extraterrestrial life has focused on distant planets and far-off stars. But some of the most compelling clues may be hiding in the deepest trenches of Earth’s oceans. In total darkness, under crushing pressure and without any sunlight, scientists have discovered thriving ecosystems powered not by light, but by chemistry.


Host David Boldeman and ConnectSci journalist Evrim Yazgin unpack how these deep-sea organisms survive using chemosynthesis, breaking down chemicals like hydrogen instead of relying on photosynthesis.


READ MORE: https://connectsci.au/news/news-parent/6784/Clues-to-extraterrestrial-life-found-in-deep-sea



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]]> Did we accidentally design our cities for mosquitoes? Did we accidentally design our cities for mosquitoes? Mon, 02 Mar 2026 23:39:53 GMT 39:32 69a61de0c6f68bd589ada781 false https://connectsci.au/news 69a61de0c6f68bd589ada781 693101a3fb6ea8e37846b815 did-we-accidentally-design-our-cities-for-mosquitoes Ocean and waterways science full 1 8 Mosquitoes are usually framed as pests and disease carriers. But what if they are simply one of the most successful species at adapting to the environments we have built?


In this episode Ultramarine, David Boldeman is joined by medical entomologist Dr Véronique Paris to explore the hidden water systems inside our cities and how they shape mosquito life.


Véronique is a Research Fellow in Medical Entomology and Vector Population Control, at the University of Melbourne: https://www.instagram.com/mozzienique/


This podcast is brought to you by ConnectSci, the home of fact-based content you can trust. For the latest science news and discoveries visit https://connectsci.au/news

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]]> Mosquitoes are usually framed as pests and disease carriers. But what if they are simply one of the most successful species at adapting to the environments we have built?


In this episode Ultramarine, David Boldeman is joined by medical entomologist Dr Véronique Paris to explore the hidden water systems inside our cities and how they shape mosquito life.


Véronique is a Research Fellow in Medical Entomology and Vector Population Control, at the University of Melbourne: https://www.instagram.com/mozzienique/


This podcast is brought to you by ConnectSci, the home of fact-based content you can trust. For the latest science news and discoveries visit https://connectsci.au/news

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]]> The impact of shifting ocean currents The impact of shifting ocean currents Fri, 13 Feb 2026 05:16:09 GMT 19:23 698ea450b0cb4fc2fde5510c false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/how-are-ocean-currents-are-shifting-with-climate-change 698ea450b0cb4fc2fde5510c 693101a3fb6ea8e37846b815 how-are-ocean-currents-are-shifting-with-climate-change Ocean and marine science full 1 7 Ocean currents are the hidden systems that regulate Earth’s climate, moving heat and energy around the planet. But as the ocean warms, those currents are beginning to shift, with major consequences for Australia.


In this episode of the Ultramarine, science journalist Ellen Phiddian explains how ocean currents work, how scientists track their movement, and why predicting their future is so complex. The conversation explores changes already being observed, from the Antarctic Circumpolar Current to the East Australian Current pushing further south along Australia’s east coast.


Together, the episode unpacks what scientists know, what remains uncertain, and why Australia, as an island continent surrounded by multiple ocean systems, is particularly exposed to changes in ocean circulation. Understanding how the ocean moves, it turns out, is essential to understanding Australia’s climate future.


More information:

  • Earth Nullschool: An interactive global map that shows ocean currents, winds, and temperatures moving around the planet in near real time. A great way to visualise systems like the East Australian Current.
  • Integrated Marine Observing System (IMOS): Australia’s national network of ocean sensors, moorings, and observing platforms used to track ocean currents, temperature, and conditions around the coastline.


For the latest science news and discoveries visit https://connectsci.au/news

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]]> Ocean currents are the hidden systems that regulate Earth’s climate, moving heat and energy around the planet. But as the ocean warms, those currents are beginning to shift, with major consequences for Australia.


In this episode of the Ultramarine, science journalist Ellen Phiddian explains how ocean currents work, how scientists track their movement, and why predicting their future is so complex. The conversation explores changes already being observed, from the Antarctic Circumpolar Current to the East Australian Current pushing further south along Australia’s east coast.


Together, the episode unpacks what scientists know, what remains uncertain, and why Australia, as an island continent surrounded by multiple ocean systems, is particularly exposed to changes in ocean circulation. Understanding how the ocean moves, it turns out, is essential to understanding Australia’s climate future.


More information:

  • Earth Nullschool: An interactive global map that shows ocean currents, winds, and temperatures moving around the planet in near real time. A great way to visualise systems like the East Australian Current.
  • Integrated Marine Observing System (IMOS): Australia’s national network of ocean sensors, moorings, and observing platforms used to track ocean currents, temperature, and conditions around the coastline.


For the latest science news and discoveries visit https://connectsci.au/news

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]]> The strange physics of tides The strange physics of tides Tue, 27 Jan 2026 05:25:43 GMT 18:51 6978499a4366b0662d9e7933 false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/the-strange-physics-of-tides 6978499a4366b0662d9e7933 693101a3fb6ea8e37846b815 the-strange-physics-of-tides Ocean and marine science full 1 6 David Boldeman is joined by science journalist Ellen Phiddian to explore the strange and often misunderstood physics of tides. The conversation unpacks why most coastlines experience two tides a day, why tidal behaviour varies so dramatically around the world, and what tide charts are actually measuring. Along the way, they examine spring and king tides, the influence of geography and ocean shape, and how tidal forces affect not just the oceans, but the Earth and Moon over deep time including the possibility that tides played a role in the origins of life.


For the latest science news and discoveries visit https://connectsci.au/news

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]]> David Boldeman is joined by science journalist Ellen Phiddian to explore the strange and often misunderstood physics of tides. The conversation unpacks why most coastlines experience two tides a day, why tidal behaviour varies so dramatically around the world, and what tide charts are actually measuring. Along the way, they examine spring and king tides, the influence of geography and ocean shape, and how tidal forces affect not just the oceans, but the Earth and Moon over deep time including the possibility that tides played a role in the origins of life.


For the latest science news and discoveries visit https://connectsci.au/news

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]]> How do we measure sea level rise? How do we measure sea level rise? Wed, 14 Jan 2026 05:23:24 GMT 17:39 696727b9023744df113b2ffb false https://connectsci.au/news/news-parent/7523/the-sea-level-is-rising-but-by-how-much 696727b9023744df113b2ffb 693101a3fb6ea8e37846b815 how-do-we-measure-seal-level-rise Ocean and marine science full 1 5 This episode explains how sea level rise is measured — not just that it’s happening. It demystifies the tools, the data, and the validation process that sit behind one of the most talked-about climate metrics.


Sea level is a baseline measurement that underpins city planning, infrastructure design, flood risk modelling, and long-term coastal decision-making. Understanding how we know builds trust in what we know.


Science journalist Ellen Phiddian joins host David Boldeman to guide you through the measurement process, how evidence is tested, and how journalists assess confidence in scientific claims.

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]]> This episode explains how sea level rise is measured — not just that it’s happening. It demystifies the tools, the data, and the validation process that sit behind one of the most talked-about climate metrics.


Sea level is a baseline measurement that underpins city planning, infrastructure design, flood risk modelling, and long-term coastal decision-making. Understanding how we know builds trust in what we know.


Science journalist Ellen Phiddian joins host David Boldeman to guide you through the measurement process, how evidence is tested, and how journalists assess confidence in scientific claims.

Hosted on Acast. See acast.com/privacy for more information.

]]> How you can help save the Great Barrier Reef How you can help save the Great Barrier Reef Sun, 04 Jan 2026 22:24:24 GMT 32:13 695ae89818c941d6d6741d02 false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/how-you-can-help-save-the-great-barrier-reef 695ae89818c941d6d6741d02 693101a3fb6ea8e37846b815 how-you-can-help-save-the-great-barrier-reef Ocean and marine science full 1 4 In this Ultramarine episode of the Connect Sci Podcast, host David Boldeman speaks with Sean Daly from Citizens of the Reef about how students, teachers, and everyday Australians can play a real role in protecting the Great Barrier Reef.


Sean explains the major threats facing coral reefs — especially climate change and outbreaks of Crown-of-Thorns Starfish — and why traditional scientific monitoring can only cover a small fraction of this vast marine system. He talks about the Great Reef Census, a global citizen-science project where divers, tourists, schools, and volunteers photograph and analyse reef images to build the most comprehensive picture yet of reef health.


Explore the organisations and resources mentioned:

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]]> In this Ultramarine episode of the Connect Sci Podcast, host David Boldeman speaks with Sean Daly from Citizens of the Reef about how students, teachers, and everyday Australians can play a real role in protecting the Great Barrier Reef.


Sean explains the major threats facing coral reefs — especially climate change and outbreaks of Crown-of-Thorns Starfish — and why traditional scientific monitoring can only cover a small fraction of this vast marine system. He talks about the Great Reef Census, a global citizen-science project where divers, tourists, schools, and volunteers photograph and analyse reef images to build the most comprehensive picture yet of reef health.


Explore the organisations and resources mentioned:

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]]> The secret life of dams: small waters shape changing climate The secret life of dams: small waters shape changing climate Fri, 19 Dec 2025 03:35:26 GMT 29:01 6944b4b89a763d41f1dc21ed false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/the-secret-life-of-dam 6944b4b89a763d41f1dc21ed 693101a3fb6ea8e37846b815 the-secret-life-of-dam Ocean and marine science full 1 3

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]]> Saving the Sydney Seahorse Saving the Sydney Seahorse Mon, 15 Dec 2025 20:01:15 GMT 23:10 6940685f443ad9891348b480 false https://connectsci.au/news 6940685f443ad9891348b480 693101a3fb6ea8e37846b815 saving-the-sydney-seahorse Ocean and marine science full 1 2 Host David Boldeman explores the underwater world of the Sydney Seahorse (Hippocampus whitei) with marine expert Patrick Noble from Sea Life Sydney Aquarium. This small, endangered species is the only seahorse listed as threatened in Australia, and Patrick shares the incredible science and conservation efforts working to save it.



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]]> Host David Boldeman explores the underwater world of the Sydney Seahorse (Hippocampus whitei) with marine expert Patrick Noble from Sea Life Sydney Aquarium. This small, endangered species is the only seahorse listed as threatened in Australia, and Patrick shares the incredible science and conservation efforts working to save it.



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]]> How to keep Sydney Harbour clean How to keep Sydney Harbour clean Thu, 11 Dec 2025 09:27:31 GMT 39:04 693a8e83d527840ddba85ecf false https://shows.acast.com/ultramarine-the-science-of-our-oceans-and-waterways/episodes/how-to-keep-sydney-harbour-clean 693a8e83d527840ddba85ecf 693101a3fb6ea8e37846b815 how-to-keep-sydney-harbour-clean Ocean and marine science full 1 1 Dive into the crucial issue of ocean pollution and explore real-world solutions with two passionate advocates for marine conservation. Ultramarine hosts David Boldeman and Steven Boldeman are joined by Tom Batrouney, environmental advocate and community lead at Seabin, and Ashley Hayes, Community Social & Environmental Impact Lead at SEA LIFE Sydney Aquarium. Together they unpack how citizen awareness, targeted tech, and collaborative responsibility are key to reclaiming Sydney Harbour’s health.


For the latest news on research and discoveries visit connectsci.au/news

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]]> Dive into the crucial issue of ocean pollution and explore real-world solutions with two passionate advocates for marine conservation. Ultramarine hosts David Boldeman and Steven Boldeman are joined by Tom Batrouney, environmental advocate and community lead at Seabin, and Ashley Hayes, Community Social & Environmental Impact Lead at SEA LIFE Sydney Aquarium. Together they unpack how citizen awareness, targeted tech, and collaborative responsibility are key to reclaiming Sydney Harbour’s health.


For the latest news on research and discoveries visit connectsci.au/news

Hosted on Acast. See acast.com/privacy for more information.

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