Pockmarks are seabed depressions that represent primary evidence of rapid biogenic/thermogenic gas build up and fluid release from seabed sediments to the water column. We use a Geographical Information System (GIS) to analyse multibeam echo-sounder bathymetric data and use a range of semi-automated tools to map seabed pockmarks in fjords and adjacent coastal waters around western Scotland. We map 1019 individual pockmarks in 12 different hydrographic areas covering ca. 2019 km². We use morphological metrics and statistical procedures to classify and analyse the variety of pockmark forms. A k-means clustering algorithm identifies three classes of pockmark morphology: deep, elongate and regular. The recognition of separate pockmark classes could aid understanding of their age, activity and origin. This work presents the first detailed mapping of pockmark fields in Scottish west coast waters and highlights the use of pockmarks as an indicator of the quantity, mobility and fate of stored carbon.

麻点是海床凹陷，代表着快速的生物成因/生热气体积累以及流体从海底沉积物释放到水柱的主要证据。我们使用地理信息系统（GIS）分析多波束回波测深数据，并使用一系列半自动工具来绘制苏格兰西部峡湾和邻近沿海水域的海床麻点。我们在约12个不同的水文地理区域中绘制了1019个个体麻点。2019公里²。我们使用形态学指标和统计程序来分类和分析各种痘痕形式。k均值聚类算法可识别麻点形态的三类：深层，细长和规则型。识别单独的麻子类可以帮助他们了解其年龄，活动和起源。这项工作展示了苏格兰西海岸水域的痘痕田地的第一个详细地图，并着重指出了痘痕作为存储碳的数量，迁移率和命运的指标的用途。