Browsing Oceanography by Issue Date
Now showing items 41-60 of 108
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An observational study of Davis Strait transports
(2013-07-25)Davis Strait is one of two main gateways where freshwater from the Arctic enters the North Atlantic. An observing system began operating in Davis Strait in September 2004 with the goal of providing sustained, long-term ... -
Microbial Challenges and Solutions to Inhabiting the Dynamic Architecture of Saline Ice Formations
(2013-11-14)Sea ice contains a microscopic network of brine inclusions effectively colonized by organisms from the three major clades of life. The architecture of this brine channel network is dynamic, with surface area, brine volume ... -
Hydrogen Isotopes from Lipid Biomarkers: Purification, Field Calibration, and Application to Reconstructing Galapagos Paleohydrology
(2013-11-14)The tropics are centrally important in determining global climate patters as the primary heat and moisture source for atmosphere and ocean circulation. Understanding of the range of natural variability and the sensitivity ... -
Quantifying the response of diatom nitrogen metabolism to environmental changes
(2013-11-14)Diatoms are microscopic unicellular organisms that fix as much carbon annually as all terrestrial rainforests combined and, through nitrogen uptake and carbon drawdown, link global carbon and nitrogen cycles. As the most ... -
Sediment dispersal and accumulation in an insular sea: deltas of Puget Sound
(2014-02-24)Small rivers carry several million tons of sediment annually into Puget Sound and the Strait of Juan de Fuca. Once delivered to the marine environment, processes in the water column and on the seabed dictate dispersal, ... -
Ecological and evolutionary strategies of archaeal, bacterial, and viral communities in deep-sea hydrothermal vents
(2014-02-24)The deep-sea hydrothermal vent habitat, formed by subsurface water-rock reactions that create high-temperature hydrothermal fluid, is dominated by physical, chemical, and mineralogical gradients. The mixing of cold, oxidized ... -
Meridional Exchanges and Mixing at the Iceland-Faroe Ridge
(2014-02-24)The Greenland-Scotland Ridge influences the exchange of warm and cold water masses between the North Atlantic and the Nordic Sea, a circulation with significant impact on global ocean circulation and climate. This study ... -
Eddy Circulation, Heat and Salt Balances, and Ocean Metabolism: Observations from a Seaglider-Mooring Array at Ocean Station Papa
Seagliders were deployed at Ocean Station Papa (OSP; 50N, 145W) in the southern Gulf of Alaska, augmenting a NOAA Ocean Climate Stations surface fluxes mooring and subsurface ADCP, from 8 June 2008 to 21 January 2010. ... -
Untangling Genomes from Metagenomes
Abundant and evolutionarily diverse populations of microbes dramatically shape the ecology of every marine environment on Earth. While it is straightforward to detect and classify members of these natural communities using ... -
Internal Waves in the Western Arctic Ocean
The importance of internal waves in the Western Arctic Ocean is assessed using a combination of observations from Ice-Tethered Profilers drifting in the Canada Basin between Fall 2005 and Fall 2014 and numerical simulations ... -
The biogeochemistry of particulate trace elements and isotopes in the North Atlantic Ocean
The distributions and bioavailability of trace metals and their isotopes are strongly controlled by partitioning between the dissolved phase and suspended and sinking biotic and abiotic particles. This work presents new ... -
Elucidating the metabolic activities of SUP05, an abundant group of marine sulfur oxidizing gamma-proteobacteria
Chemoautotrophic bacteria that oxidize sulfur and reduce nitrogen in low oxygen zones carry out chemical transformations of molecules containing the key elements: carbon, nitrogen and sulfur. Members of the SUP05 clade of ... -
The lifestyles of viruses in the sunlit ocean revealed through isolation, genomics, and infection dynamics
In the sunlit ocean, heterotrophic and photosynthetic microbes are prey for earth’s most abundant predators. Viruses are regulators of microbial communities, terminating phytoplankton blooms, altering biogeochemical cycles ... -
Improved estimates of air-sea oxygen fluxes and biological carbon export through the use of self-calibrating Argo oxygen floats in the Pacific
The production and consumption of oxygen during photosynthesis and respiration stoichiometrically links oxygen and organic carbon in the surface ocean. Oxygen sensors are currently being deployed on profiling floats ... -
Uncovering Mechanisms of Phytoplankton Response to Climate Change
Phytoplankton are responsible for approximately half the primary production on earth, fueling marine food webs and driving the cycling of carbon and inorganic nutrients in the oceans. Climate change is predicted to alter ... -
On the structure of the internal wave field: the impact of the distribution of shear and strain variance in wavenumber-frequency space on mixing estimates
Data from an archive of McLane Moored Profiler (MP) deployments are used to investigate the role of internal waves, and in general physical processes occupying this frequency range, on the dissipation of kinetic energy and ... -
Tropical South Pacific Paleohydrology from Hydrogen Isotopes in Algal Lipids
The tropics play a central role in global atmospheric moisture transport, however paleoclimate records of tropical precipitation are relatively scarce. Reconstructing pre-instrumental hydrological change requires the use ... -
Observations of Near-Surface Temperature and Salinity from Profiling Floats: Vertical Variability, Structure, and Connection to Deeper Properties
In response to the changing climate, it is probable that there is an intensification of the oceanic hydrologic cycle underway. Due to the difficulty of observing the ocean, especially very close to the sea surface, we lack ... -
A New Instrument and Method for Nitrogen-loss Studies in Oxygen Deficient Zones
The ocean’s biogeochemical cycles are coming under increasing stress due to global climate change and anthropogenic emissions of carbon dioxide. Three different factors are stressing the oceans: rising temperatures, ... -
Evolutionary response of marine bacteria to the co-occurring pnictogens phosphorus and arsenic
Phosphorus is an essential component of biomolecules, and is believed to be the limiting nutrient in the marine environment on geologic timescales. In marine waters, phosphorus co-occurs with arsenic, an element with many ...