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Artwork for Ultramarine: the science of our oceans and waterways

Ultramarine: the science of our oceans and waterways

ConnectSci
Sydney Harbour
Ocean Currents
Sydney Seahorse
Greenhouse Gases
Great Barrier Reef
Sea Level Rise
Moon
Deep Sea Ecosystems
North Water Polinia
Ancient Seafaring
Ocean Temperature
Farm Dams
Conservation
Teal Carbon
Livestock
PONDI
Citizens Of the Reef
Earth
Chemosynthesis
Europa Clipper

Ultramarine investigates the latest research, innovations and science news from our oceans and marine environments.

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

PublishesWeeklyEpisodes14Founded6 months ago
Number of ListenersCategories
NatureScienceEarth Sciences

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Artwork for Ultramarine: the science of our oceans and waterways

Latest Episodes

This is an episode from our new podcast, It Starts With... available on Apple, Spotify and ConnectSci.

If you enjoy this, check out part 2 of our turtles chat on It Starts With...

Australia’s freshwater turtles are some of the country’s most fasci... more

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 met... more

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 critic... more

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 tra... more

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Recent Guests

Deb Bower
Turtle ecologist / University of New England
University of New England
Episode: ‘Remarkable’ freshwater turtles face quiet decline
James Van Dyke
Turtle researcher
La Trobe University
Episode: ‘Remarkable’ freshwater turtles face quiet decline
Michael Thompson
Retired turtle biologist
University of Sydney / Adelaide period
Episode: ‘Remarkable’ freshwater turtles face quiet decline
Ricky Spencer
Meritorious Professor / turtle conservation specialist
Western Sydney University
Episode: ‘Remarkable’ freshwater turtles face quiet decline
Elizabeth Shadwick
Marine biogeochemist
CSIRO Hobart
Episode: 4500m deep: remote observatory expands climate knowledge
Evrim Yazgin
ConnectSci news team member
ConnectSci
Episode: The first Arctic explorers: ancient communities thrived in harsh environments
Véronique Paris
Medical entomologist who studies Australian mosquitoes and urban environments
Beating Brule in Victoria project (mentioned)
Episode: Did we accidentally design our cities for mosquitoes?
Ellen Phiddian
Regular contributor to ConnectSci
ConnectSci
Episode: How do we measure sea level rise?
Sean Daly
Marine Operations Manager at Citizens of the Reef
Citizens of the Reef
Episode: How you can help save the Great Barrier Reef

Host

David Boldeman
Host of Ultramarine and ConnectSci podcast, often introducing guests and guiding the conversation.

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Talking Points

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How to keep Sydney Harbour clean
Q: What are the main sources of pollution entering Sydney Harbour and how are Seabins used to address them?
The main sources are wind-blown debris (blow-off) and stormwater runoff from mismanaged urban areas. Seabins are strategically placed where litter accumulates to capture debris from the top centimeter of water, with data showing where rubbish originates and how it travels through stormwater systems to the harbour.
How to keep Sydney Harbour clean
Q: Why is keeping our waterways pollution free so important for Sydney Harbour?
There are multiple motivations: protecting human health and well-being, preserving the marine ecosystem, and safeguarding economic assets like tourism, fisheries, and waterfront activities. Data from Seabin and marine partners shows how pollution transfers from city streets to the water, which in turn affects people and local businesses.
How is ocean temperature measured?
Q: How reliable are the long-term warming signals?
The signals are extremely confident because diverse data sources converge on the same warming trend, and climate models have accurately predicted the observed changes as emissions have risen.
How is ocean temperature measured?
Q: What makes ocean heat content the key metric?
It's straightforward to measure across many locations, and it directly reflects the large-scale storage of heat from greenhouse gases, serving as a robust proxy for the energy imbalance driving climate change.
How is ocean temperature measured?
Q: How do we actually know that the oceans are warming?
There are multiple, independent measurements—satellites for sea surface temperature, ships and water sampling, and autonomous Argo floats—that all show the same warming trend from the surface down to the deep ocean, which strengthens confidence in the conclusion.

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Frequently Asked Questions About This Podcast

What is This Podcast about and what kind of topics does it cover?

This series centers on the latest ocean science, climate-related marine research, and hands-on conservation work. Across episodes, listeners encounter deep dives into how oceans regulate climate, advances in observing systems, and practical actions that communities can take to protect coastal environments. Guests range from turtle ecologists and marine biogeochemists to educators, journalists, and aquarium conservation specialists, creating a mix of rigorous science, field storytelling, and real-world applications from citizen science to policy-relevant interventions. A recurring strength is translating complex measurements and long time horizons into accessible takeaways, with several episodes highlighting actionable conservation strategie... more

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1. The Rest Is Politics: US
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this podcast launched 6 months ago and published 14 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on this podcast?

Recent guests on this podcast include:

1. Deb Bower
2. James Van Dyke
3. Michael Thompson
4. Ricky Spencer
5. Elizabeth Shadwick
6. Evrim Yazgin
7. Véronique Paris
8. Ellen Phiddian

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