First Institute of Oceanography

Uncertainty quantification-driven shear wave velocity prediction using a spatiotemporal Bayesian neural network

Abstract Shear wave velocity (Vs) is a key parameter used for seismic data processing and evaluating oil and gas reservoirs. Conventional logging and machine learning methods are hampered by the provision of fixed Vs predictions, which limits their capacity to effectively quantif...

A source-to-sea decision-support framework for wet-weather wastewater load management: evidence from Jiaozhou Bay

Coastal concentration compliance can overlook increased wastewater throughput during wet weather. We developed a source-to-sea decision-support framework using 2019–2022 wastewater, river, and marine observations from Jiaozhou Bay, China. The analysis combined source-record audit...

Surface-to-volume physics-informed model for 3D mesoscale eddy detection: Multi-source multi-scale fusion

Mesoscale eddies play a crucial role in the ocean, and accurate detection of their three-dimensional (3D) structures is essential for understanding marine dynamics. However, 3D eddy reconstruction remains challenging: traditional methods provide limited pixel-level boundary delin...

A Four-Stage Morphodynamic Model for the Abandoned Subaqueous Diaokou Lobe of the Yellow River Delta (1976–2026): Semi-Quantitative Assessment of Natural and Anthropogenic Forcing Factors

Abandoned delta lobes worldwide face severe net erosion driven by chronic sediment starvation and intensifying marine hydrodynamic forcing, which poses pervasive threats to nearshore and offshore engineering infrastructure, particularly delta zones with dense subsea energy facili...

In-situ shear-wave sound speed and attenuation in sandy seabed sediment: frequency dependence from 500 Hz to 3 kHz

The acoustic behavior of seafloor sediments is a key topic in marine geoscience and engineering, and the shear-wave response provides essential information on sediment mechanical properties and wave propagation mechanisms. Furthermore, shear-wave properties have important practic...

Evaluation of Ferromanganese Crusts on Western Pacific Seamounts Using a Distance–Relative Water Depth Variogram Model Based on Multiseamount Data

High survey costs restrict geological stations to an extremely sparse distribution, which has constrained the establishment of geostatistical models of ferromanganese crust thickness on individual seamounts. Moreover, because crust thickness is independent of direction yet contro...

Complete mitochondrial genome and phylogenetic analysis of Taiwanese Wedgefish ( Rhynchobatus immaculatus )

Taiwanese Wedgefish is widely distributed in the western North Pacific. It is listed as Critically Endangered on the International Union for Conservation of Nature Red List of Threatened Species. However, genetic information on this species remains very limited. In this study, th...

Global Potential Refugia and Conservation Gaps for Threatened Marine Rays Under Future Climate Change

Climate change is redistributing marine biodiversity and may reduce the long-term effectiveness of static conservation networks. Threatened marine rays may be particularly vulnerable because many species have slow life histories, limited recovery capacity, and strong dependence o...

Poleward Redistribution of Tropical Cyclone Hazards over East Asia

Abstract Tropical cyclones (TCs) in the western North Pacific have undergone notable changes over recent decades alongside ocean warming and large-scale atmospheric circulation variability. Using TC best-track data from 1980 to 2025, we identify a pronounced poleward redistributi...

Integrated marine spatial planning for Chonburi Province, Thailand: Addressing pollution, blue carbon, and conservation

While Marine Spatial Planning (MSP) is globally recognized as a strategic tool for ocean governance, its implementation in tropical coastal regions faces distinct challenges stemming from fragmented governance and acute conflicts between traditional livelihoods and modern industr...

Hyperspectral Technology: A Method Framework for the Estimation of Metal Content in Cobalt-Rich Crusts

Cobalt-rich ferromanganese crusts are an important deep-sea mineral resource, and the ore grade is a key indicator for evaluating their resource potential. Conventional ore-grade assessment relies on representative samples and extensive laboratory analyses, posing significant cha...

Soil microbial community structure and assembly are more strongly associated with soil background nitrogen content than by short-term nitrogen addition in a salt marsh

Soil microbes drive nutrient cycling, and microbial community composition and assembly are often shaped by plant succession and environmental heterogeneity. Nitrogen (N) is a vital nutrient for microorganisms, yet it remains unclear whether microbial responses to elevated N input...

Will work for sardines: 20 years of animal-borne ocean observing by Australia’s Integrated Marine Observing System (IMOS) Animal Tagging Facility

The world’s ocean stores ~90% of the excess heat generated by anthropogenic global warming, making sustained ocean observations essential for understanding physical, biological and climate processes. Here, we describe how the Integrated Marine Observing System (IMOS) Animal Taggi...

Wintertime organic carbon export provides a potential food source for zooplankton in the High Arctic

Abstract Pulsed particulate organic carbon export plays a vital role in sustaining Arctic marine ecosystems and the biological pump. Wintertime particulate organic carbon export in ice-covered Arctic waters is generally considered negligible due to light-limited local primary pro...

Electrical conductivity models for bubble-bearing marine fine-grained sediments

Abstract Large sediment-displacing bubbles are widespread in seafloors and typically found in shallow and fine-grained sediments. These bubbles have significant environmental and engineering impacts. Acoustic methods are the most widely used geophysical investigation method for b...