Methane Anomalies in Ragay Gulf Seawater with Flux Estimates

Vertical methane distribution measurements in the Ragay Gulf, Philippines, characterize mid-water and bottom-water plumes. The dataset includes an average methane supersaturation of 206±16.5% in surface waters and an estimated minimum sea-air flux of 101 nmole.cm-2.y-1. Data was published by Geoscience Australia and last updated in May 2026.

Use Cases

• Modeling methane transport from seafloor to atmosphere based on described plume structures and flux estimates
• Comparing natural fossil methane fluxes to anthropogenic sources using the provided flux measurements
• Analyzing the relationship between methane anomalies and thermocline gradients as described in the study
• Assessing regional contributions to atmospheric greenhouse gases from marine sources in the Philippines archipelago

Strengths

• Includes specific quantitative measurements: average methane supersaturation of 206±16.5% and estimated sea-air flux of 101 nmole.cm-2.y-1
• Provides geochemical and geological context for methane origin, suggesting thermogenic seepage
• Describes spatial characteristics of methane plumes, including thickness (80-100 m) and depth confinement (100-220 m)

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data is provided in PDF/HTML formats, which may require extraction for computational analysis

Provenance

Source

Geoscience Australia Data

Collection Method

Vertical distribution measurements in the water column of the Ragay Gulf

Time Range

null

Freshness

Last updated 2026-05-14 08:51:25.905916; freshness should be verified

Geography

Ragay Gulf, Philippines archipelago