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Submersible operated peepers for collecting porewater from deep‐sea sediments
Author(s) -
Dattagupta Sharmishtha,
Telesnicki Guy,
Luley Kathryn,
Predmore Benjamin,
McGinley Michael,
Fisher Charles R.
Publication year - 2007
Publication title -
limnology and oceanography: methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.898
H-Index - 72
ISSN - 1541-5856
DOI - 10.4319/lom.2007.5.263
Subject(s) - sediment , anoxic waters , deep sea , environmental science , sampling (signal processing) , wetland , streams , oceanography , deep water , sample (material) , geology , environmental chemistry , ecology , biology , chemistry , geomorphology , engineering , computer science , chromatography , electrical engineering , computer network , filter (signal processing)
Peepers are a common alternative to push cores for collecting porewater from shallow aquatic environments such as lakes, streams, and wetlands but are infrequently used to sample deep‐sea sediments due to design limitations. In this study, a peeper was developed to obtain porewater from precisely located positions on the deep‐sea floor using remotely operated or manned submersibles. The sample cells of the peepers can be sealed closed after they are deoxygenated on board a ship to ensure that they remain anoxic until peepers are deployed at the deep‐sea sampling location. Similarly, peeper cells can be closed at the end of an incubation period to maintain sample integrity during submersible recovery and until sample processing. Each peeper can be used to collect samples from 10 cm above the sediment water interface and at 10 cm intervals down to 60 cm depth in the sediment, and can provide sufficient volume for multiple chemical analyses, including stable isotope ratio determinations.