National Marine Data and Information Service

A Spatial-Domain Crest-Line Tracking Method for Swell-Based Shallow-Water Bathymetry Retrieval from Sentinel-1 SAR Imagery

Shallow-water bathymetry is essential for coastal dynamics, navigation, engineering, and marine-resource management, especially where in situ observations are sparse. This study proposes a wave-stripe-based method for shallow-water bathymetric retrieval from Sentinel-1A VV-polari...

Grain-Size Constrained Quantitative Calibration of Marine Sediment XRF Data Using Ensemble Machine Learning

Significant mineral phase partitioning of various elements is widely observed in marine sediments. Distinct elemental responses to grain-size sorting hinder accurate conversion of XRF scanning counts to elemental concentrations, yet this geological mechanism lacks quantitative co...

Intraseasonal variability and eddy-induced structural modulation of the North Pacific intermediate water revealed by multi-mooring observations

Abstract. The North Pacific Intermediate Water (NPIW) plays a crucial role in modulating oceanic thermohaline circulation and biogeochemical processes. However, limited continuous observations have hindered the understanding of its short-term variability and structural response t...