f Application of SAR Images to Develop the Calculation of Sea-Truth of Methane Flux to the Atmosphere mainly due to Gas Hydrate

Submarine gas hydrates represent a large pool of greenhouse gas that may interact with the atmosphere over geologic time to affect climate cycles. In the near term, the magnitude of methane reaching the atmosphere from gas hydrate on continental margins is poorly known because (1) gas hydrate is exposed to metastable oceanic conditions in shallow, dispersed deposits that are poorly imaged by standard geophysical techniques and, (2) the consumption of methane in marine sediments and in the water column is subject to uncertainty.