Ragay Gulf in the Philippines archipelago contains vertical methane distribution data from a semi-enclosed basin. The dataset, hosted by Geoscience Australia Data and last updated in 2026, characterizes mid-water and bottom-water methane plumes and estimates their contribution to atmospheric greenhouse gases. It includes measurements of methane supersaturation in surface waters and calculated sea-air flux rates.
Use Cases
- Modeling methane transport in ocean water columns based on described plume thickness and depth confinement.
- Estimating natural fossil methane fluxes to the atmosphere based on reported sea-air flux calculations.
- Comparing thermogenic versus biogenic methane origins in marine systems based on geochemical evidence discussed.
- Analyzing the relationship between seawater density gradients and methane trapping based on the temperature-depth proxy mentioned.
Strengths
- Includes specific quantitative measurements: average methane supersaturation of 206±16.5% in the top 5 meters.
- Provides calculated flux estimates: average sea-air flux of 101 nmole.cm-2.y-1 with a reported range.
- Describes spatially localized features persisting over kilometre-scale distances.
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 in the water column.
- Time Range
- null
- Freshness
- Last updated 2026-04-20 01:38:04.254995; freshness should be verified.
- Geography
- Ragay Gulf, Philippines archipelago