Riedel, M.Scherwath, M.Römer, M.Veloso, M.Heesemann, M.Spence, G.D.2019-11-292019-11-292018-12Nature Communications, 9(1), art. no. 3264.2041-1723DOI: 10.1038/s41467-018-05736-xhttp://repositorio.unab.cl/xmlui/handle/ria/10902Inexación: Scopus.Widespread gas venting along the Cascadia margin is investigated from acoustic water column data and reveals a nonuniform regional distribution of over 1100 mapped acoustic flares. The highest number of flares occurs on the shelf, and the highest flare density is seen around the nutrition-rich outflow of the Juan de Fuca Strait. We determine ∼430 flow-rates at ∼340 individual flare locations along the margin with instantaneous in situ values ranging from ∼6 mL min−1 to ∼18 L min−1. Applying a tidal-modulation model, a depth-dependent methane density, and extrapolating these results across the margin using two normalization techniques yields a combined average in situ flow-rate of ∼88 × 106 kg y−1. The average methane flux-rate for the Cascadia margin is thus estimated to ∼0.9 g y−1m−2. Combined uncertainties result in a range of these values between 4.5 and 1800% of the estimated mean values. © 2018, The Author(s).enCarbonic acidMethaneNatural gasWaterArtículo