Distribution and classification of pockmarks on the seabed around western Scotland
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2019-07-01
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| Series: | Journal of Maps |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/17445647.2019.1676320 |
| _version_ | 1818550869450293248 |
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| author | Allan Audsley Tom Bradwell John A. Howe John M. Baxter |
| author_facet | Allan Audsley Tom Bradwell John A. Howe John M. Baxter |
| author_sort | Allan Audsley |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-12T08:52:16Z |
| format | Article |
| id | doaj.art-d3dff643104e4ab0824f7175ebd78de5 |
| institution | Directory Open Access Journal |
| issn | 1744-5647 |
| language | English |
| last_indexed | 2024-12-12T08:52:16Z |
| publishDate | 2019-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Maps |
| spelling | doaj.art-d3dff643104e4ab0824f7175ebd78de52022-12-22T00:30:09ZengTaylor & Francis GroupJournal of Maps1744-56472019-07-0115280781710.1080/17445647.2019.16763201676320Distribution and classification of pockmarks on the seabed around western ScotlandAllan Audsley0Tom Bradwell1John A. Howe2John M. Baxter3Biological and Environmental Sciences, University of StirlingBiological and Environmental Sciences, University of StirlingScottish Association for Marine Science, Scottish Marine InstituteSchool of Biology, East Sands, University of St AndrewsPockmarks 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.http://dx.doi.org/10.1080/17445647.2019.1676320carbongas releaseclassificationgisk-meansmorphology |
| spellingShingle | Allan Audsley Tom Bradwell John A. Howe John M. Baxter Distribution and classification of pockmarks on the seabed around western Scotland Journal of Maps carbon gas release classification gis k-means morphology |
| title | Distribution and classification of pockmarks on the seabed around western Scotland |
| title_full | Distribution and classification of pockmarks on the seabed around western Scotland |
| title_fullStr | Distribution and classification of pockmarks on the seabed around western Scotland |
| title_full_unstemmed | Distribution and classification of pockmarks on the seabed around western Scotland |
| title_short | Distribution and classification of pockmarks on the seabed around western Scotland |
| title_sort | distribution and classification of pockmarks on the seabed around western scotland |
| topic | carbon gas release classification gis k-means morphology |
| url | http://dx.doi.org/10.1080/17445647.2019.1676320 |
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