Submarine Landslides Induce Massive Waves in Subsea Brine Pools.

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 Rep

journal_title

Scientific reports

authors

Sawyer DE,Mason RA,Cook AE,Portnov A

doi

10.1038/s41598-018-36781-7

subject

Has Abstract

pub_date

2019-01-15 00:00:00

pages

128

issue

1

issn

2045-2322

pii

10.1038/s41598-018-36781-7

journal_volume

9

pub_type

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