Geoscience Australia Data provides measurements of methane distribution in the water column of the Ragay Gulf, Philippines. The dataset includes vertical profiles showing mid-water and bottom-water methane plumes, with an average supersaturation of 206±16.5% in the top 5 meters and estimated sea-air flux rates. Data was last updated on 2026-04-30.
Use Cases
- Modeling methane transport from seafloor seeps to the atmosphere based on described plume structures.
- Comparing natural fossil methane fluxes to anthropogenic sources using the provided flux estimates.
- Analyzing the relationship between methane anomalies and thermocline gradients mentioned in the description.
- Assessing regional contributions to atmospheric greenhouse gases from coastal marine systems.
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 a thermogenic source.
- Describes spatial characteristics of methane plumes, including their thickness (80-100 m) and confinement depth (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 and HTML formats, which may require extraction for analysis.
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Vertical distribution measurements of methane in the water column.
- Freshness
- Last updated 2026-04-30 12:29:18.918381; freshness should be verified.
- Geography
- Ragay Gulf, Philippines archipelago.