Browsing Oceanography by Issue Date
Now showing items 121-140 of 152
-
Carbon cycling in the Arctic Archipelago: the export of Pacific carbon to the North Atlantic
(European Geosciences Union, 2009-01)The Arctic Ocean is expected to be disproportionately sensitive to climatic changes, and is thought to be an area where such changes might be detected. The Arctic hydrological cycle is influenced by: runoff and precipitation, ... -
Water Column Seismic Images as Maps of Temperature Gradient
(2009-03)Multichannel seismic imaging of ocean water column features is anew interdisciplinary study that may become an accepted oceanographic toot in coming years. We now know that reflectors are associated with water column ... -
Probability and mitigation of vessel encounters with North Atlantic right whales
(Inter-Research, Nordbuente 23 Oldendorf/Luhe 21385 Germany, 2009-03)Successful mitigation of vessel-whale encounters requires quantitative estimates of vessel strikes, how strike rates change over time, where strikes are most likely to occur, and options for minimizing strikes. In addressing ... -
Predicting mesoscale variability of the North Atlantic using a physically motivated scheme for assimilating altimeter and Argo observations
(American Meteorological Society, 2009-07)A computationally efficient scheme is described for assimilating sea level measured by altimeters and vertical profiles of temperature and salinity measured by Argo floats. The scheme is based on a transformation of ... -
Methyl iodide in the NW Atlantic: Spatial and seasonal variation
(2009-07)While the global ocean is an important source of atmospheric methyl iodide (CH(3)I), the major producers of CH(3)I within the ocean remain unclear. During a seasonal study in the NW Atlantic, the relationship between CH(3)I ... -
Mean surface topography of the northwest Atlantic: Comparison of estimates based on satellite, terrestrial gravity, and oceanographic observations
(American Geophysical Union, 2009-07/08)The accuracy of a new mean sea surface topography (MSST) of the northwest Atlantic is assessed. The MSST is estimated from 12 years of altimeter observations referenced with respect to a new regional geoid based on a blend ... -
Ocean Fertilization Science, Policy, and Commerce
(2009-09)Over the past 20 years there has been growing interest in the concept of fertilizing the ocean with iron to abate global warming. This interest was catalyzed by basic scientific experiments showing that iron limits primary ... -
Estimating mixed layer nitrate in the North Atlantic Ocean
(2010)Here we present an equation for the estimation of nitrate in surface waters of the North Atlantic Ocean (40 degrees N to 52 degrees N, 10 degrees W to 60 degrees W). The equation was derived by multiple linear regression ... -
Spatiotemporal variations of fCO(2) in the North Sea
(2010)Data from two Voluntary Observing Ship (VOS) (2005-2007) augmented with data subsets from ten cruises (1987-2005) were used to investigate the spatiotemporal variations of the CO2 fugacity in seawater (fCO(2)(sw)) in the ... -
Air-Sea CO2 fluxes on the Scotian Shelf: seasonal to multi-annual variability
(2010)We develop an algorithm to compute pCO(2) in the Scotian Shelf region (NW Atlantic) from satellite-based estimates of chlorophyll-a concentration, sea-surface temperature, and observed wind speed. This algorithm is based ... -
Madden-Julian Oscillation and sea level: Local and remote forcing
(American Geophysical Union, 2010-01)The Madden-Julian Oscillation (MJO) is the dominant mode of atmospheric variability in the tropical atmosphere on intraseasonal time scales (i.e., weeks to seasons). This study examines the connection between the MJO and ... -
Tropical Pacific Ocean and the Madden-Julian Oscillation: Role of wind and buoyancy forcing
(2010-05)A global ocean circulation model is used to examine the dynamical response of the tropical Pacific Ocean to forcing associated with the Madden-Julian Oscillation (MJO). Model sensitivity experiments first reveal that ... -
Satellite observations reveal high variability and a decreasing trend in CO sub(2) fluxes on the Scotian Shelf
(European Geosciences Union, 2010-07)We develop an algorithm to compute pCO sub(2) in the Scotian Shelf region (NW Atlantic) from satellite-based estimates of chlorophyll-a concentration, sea-surface temperature, and observed wind speed. This algorithm is ... -
Methodological Underestimation of Oceanic Nitrogen Fixation Rates
(2010-09)The two commonly applied methods to assess dinitrogen (N(2)) fixation rates are the (15)N(2)-tracer addition and the acetylene reduction assay (ARA). Discrepancies between the two methods as well as inconsistencies between ... -
Spatial variation in right whale food, Calanus finmarchicus, in the Bay of Fundy
(2011)No abstract available. -
Sea level and circulation variability of the Gulf of Carpentaria; influence of the Madden-Julian Oscillation and the adjacent deep ocean
(American Geophysical Union, Washington, DC, 2011)The Madden-Julian Oscillation (MJO) is a significant contributing factor to intraseasonal variability in both the tropical and extratropical atmosphere and ocean. Sea level and circulation variations in the Gulf of Carpentaria ... -
Seasonal variability of the inorganic carbon system in the Amundsen Gulf region of the southeastern Beaufort Sea
(2011-01)During a year-round occupation of Amundsen Gulf in the Canadian Arctic Archipelago dissolved inorganic and organic carbon (DIC, DOC), total alkalinity (TA), partial pressure of CO(2) (pCO(2)) and related parameters were ... -
The mean surface circulation of the North Atlantic subpolar gyre: A comparison of estimates derived from new gravity and oceanographic measurements
(2011-08)A new mean sea surface topography (MSST) is used to estimate the surface circulation of the subpolar gyre of the northwest Atlantic. The MSST is produced using a new geoid model derived from a blend of gravity data from ... -
Mapping the relationship between northern hemisphere winter surface air temperature and the Madden-Julian oscillation
(American Meteorological Society, 2011-08)A regression-based modeling approach is described for mapping the dependence of atmospheric state variables such as surface air temperature (SAT) on the Madden-Julian oscillation (MJO). For the special case of a linear ... -
Contrasting biogeochemistry of nitrogen in the Atlantic and Pacific Oxygen Minimum Zones
(2012)We present new data for the stable isotope ratio of inorganic nitrogen species from the contrasting oxygen minimum zones (OMZs) of the Eastern Tropical North Atlantic, south of Cape Verde, and the Eastern Tropical South ...