Abstract:
:Subsea hypersaline anoxic brine pools are among the most extreme habitable environments on Earth that offer clues to life on other planets. Brine is toxic to macrofauna as remotely operated vehicles commonly observe dead and preserved remains in brine pools. While brine pools are often assumed to be stable stratified systems, we show that underwater landslides can cause significant disturbances. Moreover, landslides create large-amplitude waves upon impact with the brine pool, similar to tsunami waves. We focus on the Orca Basin brine pool in the deepwater Gulf of Mexico, which contains numerous landslide deposits and blocks that originated from scarps several hundred meters above the brine pool. The impact of massive fast-moving landslides generated waves with amplitude on the order of 100 s of meters, which rival the largest known ocean waves. Brine waves can negatively affect biological communities and potentially overspill to spread hypersaline brine into surrounding basins.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Sawyer DE,Mason RA,Cook AE,Portnov Adoi
10.1038/s41598-018-36781-7subject
Has Abstractpub_date
2019-01-15 00:00:00pages
128issue
1issn
2045-2322pii
10.1038/s41598-018-36781-7journal_volume
9pub_type
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