Sorbonne University Abu Dhabi Researcher Reveals Underwater Noise's Devastating Impact on Whales

Dr. Olivier Adam: Leading Bioacoustics Research at Sorbonne University Abu Dhabi

Sorbonne University Abu Dhabi (SUAD), a beacon of Franco-Emirati academic collaboration, continues to make waves in marine science through its dedicated Ocean Institute. At the forefront is Professor Olivier Adam, a world-renowned expert in bioacoustics—the study of sound produced by living organisms in water. Adam's recent insights, highlighted in prominent media and university events, shed light on a pressing environmental challenge: the devastating effects of underwater noise on whales and broader marine life in the Arabian Gulf.

Bioacoustics plays a crucial role in understanding how marine mammals like whales navigate vast oceans, communicate with pod members, and hunt prey. Adam, who heads key projects at SUAD's Ocean Institute, employs advanced acoustic monitoring techniques, including hydrophones and AI-driven analysis, to decode whale songs and calls. His work not only documents these natural soundscapes but also quantifies human-induced disruptions, positioning SUAD as a leader in UAE higher education's push toward ocean sustainability.

The Ocean Institute integrates marine acoustics with molecular biology, biochemistry, and artificial intelligence to develop solutions for coastal protection and the blue economy. Initiatives like mangrove restoration and biodiversity assessments in Abu Dhabi underscore SUAD's commitment, training the next generation of ocean scientists amid the UAE's Vision 2031 for environmental stewardship.

The Nature of Underwater Noise Pollution

Underwater noise pollution stems primarily from anthropogenic sources such as commercial shipping, oil and gas exploration, seismic surveys, naval sonar, and construction activities. In the Arabian Gulf, one of the world's busiest maritime routes, massive container ships and tankers generate continuous low-frequency rumbles that travel vast distances underwater—up to thousands of kilometers—due to sound's efficient propagation in water.

These noises overlap with the frequency bands whales use for vital functions. Humpback whales, for instance, produce songs between 20 Hz and 24 kHz for mating and social bonding, while their echolocation clicks reach up to 200 kHz. When human-generated noise intrudes, it creates 'acoustic masking,' drowning out these essential signals much like city traffic overwhelms a conversation.

Recent global observations indicate noise levels in busy shipping lanes have doubled every decade since the 1960s, with the Gulf experiencing particularly acute exposure from oil tanker traffic. SUAD's research emphasizes that chronic exposure, rather than acute blasts, poses the greatest long-term threat to resident populations.

How Whales Depend on Sound in Their World

Whales, particularly toothed whales like sperm whales and beaked species, and baleen whales such as humpbacks, rely on sound as their primary sensory tool. Echolocation allows them to 'see' prey in pitch-black depths, while complex songs facilitate long-distance communication across pods spanning hundreds of kilometers.

In the Arabian Gulf, the endangered Arabian humpback whale—a non-migratory subspecies unique to the region—uses these acoustic cues for foraging in nutrient-poor waters and navigating shallow straits like Hormuz. Disruptions force whales to alter dive patterns, increase vocalization volume (energetically costly), or cease calling altogether, leading to isolation from family groups.

Adam's studies reveal that Gulf humpbacks, adapted to a confined habitat, face amplified risks. Their songs, vital for reproduction in a population numbering fewer than 100 breeding females, are particularly vulnerable to masking by ship propellers and seismic air guns used in offshore surveys.

Physiological and Behavioral Toll on Whales

Exposure to underwater noise triggers a cascade of stress responses in whales. Elevated glucocorticoid hormones—the mammalian equivalent of cortisol—indicate chronic physiological strain, suppressing immune function and reproduction. In extreme cases, mid-frequency sonar has linked to mass strandings, as seen in global incidents where beaked whales surface too rapidly, suffering decompression sickness or 'the bends.'

Behavioral shifts include reduced foraging efficiency; whales abandon prime feeding grounds near shipping lanes, leading to malnutrition. Recent observations show calls dropping by up to 50% during seismic operations, isolating individuals and disrupting social structures. For Gulf humpbacks, this means heightened ship collision risks in traffic-heavy areas.

Long-term population declines are evident: the Arabian humpback's numbers have plummeted 90% since the 1960s, partly attributed to noise alongside whaling and habitat loss. Adam notes sustained exposure impairs navigation, potentially stranding whales in unfamiliar shallows.

Photo by Nithin Purple on Unsplash

Arabian Gulf: A Hotspot for Acoustic Disruption

The Arabian Gulf, semi-enclosed and shallow, amplifies noise resonance. Home to over 10% of global oil shipments, it hosts dense tanker convoys through the Strait of Hormuz—20% of the world's oil passes here daily. Seismic surveys for new reserves add impulsive blasts reaching 250 dB, far exceeding whales' tolerance thresholds of 160-180 dB.

SUAD's monitoring reveals baseline noise levels 10-20 dB higher than open oceans, correlating with fewer whale detections in high-traffic zones. UAE's desalination plants and coastal developments compound this, with dredging generating sediment plumes and continuous rumble.

Yet, the Gulf supports diverse cetaceans: dugongs, dolphins alongside humpbacks. Protecting this biodiversity aligns with UAE's Blue Economy goals, where SUAD research informs policy like marine protected areas (MPAs) around Sir Bani Yas Island.

SUAD's Cutting-Edge Research Methodologies

Dr. Adam's team deploys passive acoustic monitoring (PAM) arrays—underwater microphones recording 24/7—to map soundscapes. AI algorithms analyze petabytes of data, distinguishing whale songs from ship noise via machine learning models trained on decades of recordings.

Collaborations with French Sorbonne labs integrate molecular analysis of stress biomarkers from biopsy samples. Events like Adam's 'Whale Languages' conference foster interdisciplinary dialogue, training UAE students in acoustics via hands-on Gulf expeditions.

This research empowers real-time noise mapping, vital for UAE's expanding offshore wind and port projects under net-zero ambitions.

Mitigation Strategies and Global Best Practices

Solutions include 'quiet shipping'—slowing vessels by 10-20% cuts noise 30-50%—and broadband coatings on hulls. Seismic operators adopt soft-start ramps, gradually ramping air gun power to allow whale clearance.

• Designated quiet zones in MPAs
• Real-time PAM alerts to reroute ships
• AI-optimized routing avoiding whale hotspots
• International regs like IMO's noise guidelines

UAE leads regionally, piloting noise reduction in Jebel Ali Port. SUAD advocates integrating bioacoustics into EIA (Environmental Impact Assessments) for coastal projects.

Broader Implications for UAE Marine Ecosystems and Policy

Beyond whales, noise affects fish stocks—UAE's fisheries worth AED 1bn annually—altering predator-prey dynamics. Plankton, base of the food web, show stress responses, rippling upward.

SUAD's work supports UAE's National Climate Change Plan, pushing for Gulf-wide noise accords. As UAE hosts COP28 legacy events, ocean noise features prominently, with SUAD researchers advising on Blue Economy frameworks.

Higher education in UAE benefits: SUAD's programs attract global talent, fostering PhDs in marine tech amid 20% growth in ocean STEM enrollments.

Photo by Mahmoud Alaydi on Unsplash

SUAD's Role in UAE Higher Education Excellence

SUAD exemplifies UAE's world-class universities, blending French rigor with local relevance. The Ocean Institute trains Emiratis in high-demand fields like AI-ocean modeling, aligning with Mohammed bin Rashid's innovation drive.

Partnerships with Khalifa University and NYU Abu Dhabi amplify impact, sharing datasets for Gulf-wide monitoring. Student projects, like AI classifiers for dolphin clicks, prepare graduates for blue jobs in renewables and conservation.

Future Outlook: Quieter Oceans Through Research and Collaboration

Dr. Adam envisions AI-powered 'acoustic traffic lights' warning ships of whale presence. SUAD's 2025 'Year of the Ocean' initiatives expand monitoring, aiming for policy influence at IMO forums.

With UAE's desalination doubling by 2030, proactive noise management safeguards marine life, sustaining tourism (AED 40bn sector) and fisheries. SUAD researchers urge vessel speed limits in whale corridors, promising healthier Gulf ecosystems.

This blend of academia and action positions UAE universities as global ocean guardians, inspiring youth to tackle planetary challenges.