Celebrating World Oceans Day: How Spectroscopy is Advancing Oceanography

At Spectroscopy Magazine, we are committed to providing the audience with practical information that can help researchers, academics, laboratory technicians, and industry professionals keep ahead of the competition and improve their proficiency in the latest analytical spectroscopy tools and techniques.¹

But we’re focusing on more than teaching our audience the techniques; we’re showing them how these techniques can be applied in specific application areas for specific functions. One of these application areas is oceanography, and that is why today on June 8^th, Spectroscopy Magazine is celebrating World Oceans Day with the release of a colorful, interactive mini-booklet that highlights how spectroscopy is advancing oceanography.

Why is celebrating World Oceans Day important?

Celebrating World Oceans Day draws global attention because it spotlights the vast and still largely mysterious waters that cover approximately 70% of our planet. Despite the amount of research conducted in this area, there is still a lot we don’t know about the Earth’s oceans, particularly the abyssal zone and the trenches, which are two areas so deep that light does not penetrate there and little research has been conducted here.

However, what we do know is that Earth's oceans play a key role in facilitating life on Earth. Oceans help regulate our climate, sustain biodiversity, drive global chemical cycles, and support ecosystems and human communities around the world. Yet, despite its importance, many ocean processes remain extraordinarily difficult to observe directly, from the chemistry churning around hydrothermal vents miles below the surface to the silent spread of microplastics through remote marine reserves. Increasingly, spectroscopy is helping scientists rise to that challenge.

How has spectroscopy helped us understand more about our oceans?

Spectroscopy is the study of how matter interacts with light, and it has emerged as one of oceanography's most powerful and versatile tools. Through electronic and vibrational spectroscopy, hyperspectral imaging (HSI), fluorescence methods, and satellite-based sensing, researchers are gaining unprecedented insight into the chemistry, biology, and physics of marine environments.

Some of the most compelling advances involve deep-sea exploration. Raman spectroscopy systems, engineered to withstand extreme hydrostatic pressure, are now enabling scientists to investigate microbial processes and elemental cycling on the ocean floor.² Meanwhile, the optical signatures of dissolved organic matter are helping researchers trace deep-ocean circulation patterns, offering new windows into global carbon transport and climate-linked ocean dynamics.³

Spectroscopy is also at the forefront of the fight against plastic pollution. Advanced Raman systems combined with artificial intelligence (AI) and neural networks are accelerating the identification of microplastics in our oceans, allowing scientists to suggest important public policy initiatives that help preserve our oceans for future generations and implement scientific solutions that can reduce the impact of plastic pollution on our oceans.

From orbit to the ocean floor, spectroscopic sensors embedded in satellites, autonomous floats, gliders, and underwater observatories now continuously monitor chlorophyll levels, ocean acidification, dissolved oxygen, and thermal emissions in real time. Hyperspectral imaging from airborne platforms is mapping fragile coral reef ecosystems with remarkable precision, supporting conservation efforts where they are needed most.

On this World Oceans Day, the message is clear: protecting our oceans demands understanding them, and spectroscopy is helping us uncover more secrets about the deep sea and the living creatures that inhabit this ecosystem. Our booklet will show how various spectroscopic techniques are being applied in oceanography, what the strengths and limitations of these techniques are in these studies, and how these might inform future oceanography studies. As spectroscopic technology continues to advance, it is expected that we will learn more about our ocean’s, which will be paramount to ensure the future health of our planet.

References

1. Spectroscopy Staff, About Spectroscopy. Spectroscopy. Available at: https://www.spectroscopyonline.com/view/about-spectroscopy (accessed 2026-06-02).
2. Wetzel, W. How Spectroscopy Can Explore the Underworld on Earth. Spectroscopy. Available at: https://www.spectroscopyonline.com/view/how-spectroscopy-can-explore-the-underworld-on-earth (accessed 2026-06-02).
3. Wetzel, W.; Spectroscopy Staff. Dissolved Organic Matter Optical Properties Offer New Window Into Deep Ocean Circulation, Study Finds. Spectroscopy. Available at: https://www.spectroscopyonline.com/view/dissolved-organic-matter-optical-properties-offer-new-window-into-deep-ocean-circulation-study-finds (accessed 2026-06-02).