| Publications | | » |
Characterizing Spatial and Temporal Variability of Dissolved
Gases in Aquatic Environments with in situ Mass Spectrometry. Environmental Science and Technology, in press. doi:10.1021/es803717d
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“Method for rapid
localization of seafloor petroleum contamination using concurrent mass
spectrometry and acoustic positioning” Marine
Pollution Bulletin in press. doi:10.1016/j.marpolbul.2009.05.016.
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“Toward Extraplanetary Under-Ice Exploration: Robotic Steps
in the Arctic”, Journal
of Field Robotics. 26(4): 411-429, 2009.
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“The 2005 Chios Ancient Shipwreck Survey: New Methods for Underwater
Archaeology.” Hesperia, in press.
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“Deep Sea Underwater Robotic Exploration in the Ice-Covered Arctic
Ocean with AUVs” In Proceedings of the
2008 International Conference on Robotics and Systems. Nice, France. September
22-26, 2008.
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“Active methane venting observed at giant
seafloor pockmarks along the U.S. mid-Atlantic shelf break”, Earth and
Planetary Science Letters, Vol. 267, No. 1-2., March 2008, pp. 341-352.
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“Dissolved methane distributions and
air-sea flux in the plume of a massive seep field, Coal Oil Point, California”, Geophysical
Research Letters, 34(22) L22603,
2007, doi:10.1029/2007GL031344, 2007.
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“NEREUS/Kemonaut, a mobile autonomous underwater mass spectrometer”.
Trends in Analytical Chemistry 23(4):307-313.
2004.
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“Real-time Streaming of Environmental Field Data”. Computers &
Geosciences. 29(4): 457-468. 2003.
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“NEREUS: engineering concept for an underwater mass spectrometer”. Trends
in Analytical Chemistry 21(8):526-533. 2002.
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"Investigation of Hydrothermal Vents in the Aegean Sea using an Integrated Mass Spectrometer and Acoustic Navigation System
onboard a Human Occupied Submersible." In Rapp. Comm. Internationale pour l’Exploration Scientifique de la Mer
Mediterranèe (CIESM) 38: 79, 2007
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“Characterizing marine
hydrocarbons with in-situ mass spectrometry”, In Proceedings of MTS/IEEE OCEANS 2007, Vancouver,
Canada. Sept. 29-Oct. 4 2007.
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“Rapid Swath
Mapping of Reef Ecology and Associated Water Column Chemistry in the Gulf of Chiriquí, Panamá”, In Proceedings of MTS/IEEE OCEANS 2007, Vancouver,
Canada. Sept 29-Oct 4 2007.
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“Design of a Gas Tight Water
Sampler for AUV Operations” In Proceedings of IEEE OCEANS Europe 2007. Aberdeen, Scotland 2007.
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“Bathymetry-Aided Doppler
Re-Navigation for AUVs”. In Proceedings of
MTS/IEEE OCEANS 2005, Washington DC, USA 2005.
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“Integrating in-situ chemical sampling with
AUV control systems”. In Proceedings of
MTS/IEEE OCEANS 2004, Kobe,
Japan 2004.
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Development of mobile computing applications for hydraulics and water quality
field studies. In: Hydraulic Information Management. Blain, W.R. and Brebbia, C.A. (ed). WIT Press. Southampton.2002. pp. 275-284.
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R. Camilli and A. N. Duryea
,
Characterizing Spatial and Temporal Variability of Dissolved
Gases in Aquatic Environments with in situ Mass Spectrometry. Environmental Science and Technology, in press. doi:10.1021/es803717d
The TETHYS mass spectrometer is intended for long-term in situ
observation of dissolved gases and volatile organic compounds in
aquatic environments. Its design maintains excellent low mass range
sensitivity and stability during long-term operations, enabling
characterization of low-frequency variability in many trace dissolved
gases. Results are presented from laboratory trials and a 300-h in situ
trial in a shallow marine embayment in Massachusetts, U.S.A. This time
series consists of over 15 000
sample measurements and represents the longest continuous record made
by an in situ mass spectrometer in an aquatic environment. These
measurements possess sufficient sampling density and duration to apply
frequency analysis techniques for study of temporal variability in
dissolved gases. Results reveal correlations with specific
environmental periodicities. Numerical methods are presented for
converting mass spectrometer ion peak ratios to absolute-scale
dissolved gas concentrations across wide temperature regimes
irrespective of ambient pressure, during vertical water column profiles
in a hypoxic deep marine basin off the coast of California, U.S.A.
Dissolved oxygen concentration values obtained with the TETHYS
instrument indicate close correlation with polarographic oxygen sensor
data across the entire depth range. These methods and technology enable
observation of aquatic environmental chemical distributions and
dynamics at appropriate scales of resolution.
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