Unusual coastal flood impacts in Salmon Valley, McMurdo Sound, Antarctica

TitleUnusual coastal flood impacts in Salmon Valley, McMurdo Sound, Antarctica
Publication TypeJournal Article
Year of Publication2016
AuthorsDayton PK, Hammerstrom K, Jarrell SC, Kim S, Nordhausen W., Osborne D.J, Thrush S.F
JournalAntarctic Science
Date Published2016/08
Type of ArticleArticle
ISBN Number0954-1020
Accession NumberWOS:000379417400005
Keywordsbasal freezing; baseline monitoring; coastal ecology; dry; grounded ice-sheet; ice uplift; last glacial maximum; multiyear sea-ice; ross sea; sedimentation; valleys

Large floods bringing significant sediments into the coastal oceans have not been observed in Antarctica. We report evidence of a large flood event depositing over 50 cm of sediment onto the nearshore benthic habitat at Salmon Bay, Antarctica, between 1990 and 2010. Besides direct observations of the sedimentation, the evidence involves a debris flow covering old tyre tracks from the early 1960s, as well as evidence of a considerable amount of sediment transported onto the Salmon Creek delta. We believe that the flood was sourced from the Salmon Glacier and possibly the smaller Blackwelder Glacier. Such floods will be more common in the future and it is important to better understand their ecological impacts with good monitoring programmes.

Short TitleAntarct. Sci.
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