scholarly journals Effects of physical processes on structure and transport of thin zooplankton layers in the coastal ocean

2005 ◽  
Vol 301 ◽  
pp. 199-215 ◽  
Author(s):  
MA McManus ◽  
OM Cheriton ◽  
PT Drake ◽  
DV Holliday ◽  
CD Storlazzi ◽  
...  
Keyword(s):  
Coastal Ocean ◽  
Physical Processes

scholarly journals The spatiotemporal dynamics of the sources and sinks of CO2 in the global coastal ocean

2021 ◽  
Author(s):  
Alizee Roobaert ◽  
Goulven Laruelle ◽  
Laure Resplandy ◽  
Peter Landschützer ◽  
Nicolas Gruber ◽  
...  
Keyword(s):  
Seasonal Variability ◽  
Coastal Ocean ◽  
Global Ocean ◽  
Physical Processes ◽  
Sources And Sinks ◽  
Air Water Interface ◽  
Low Latitudes ◽  
Coastal Sea ◽  
Spatio Temporal ◽  
Freshwater Inputs

<p>The spatio-temporal variability and the underlying drivers of the carbon dioxide (CO<sub>2</sub>) exchange at the air-water interface (FCO<sub>2</sub>) of the global coastal ocean are still poorly understood and their quantification remains highly uncertain. Here, we present an analysis of the spatial and seasonal variability of FCO<sub>2</sub> using a high-resolution (0.25 degree) monthly climatology (1998-2015 period) for coastal sea surface partial pressure in CO<sub>2</sub> (pCO<sub>2</sub>), globally.</p><p>Overall, a clear latitudinal pattern emerges from our analysis regarding sources/sinks distribution of atmospheric CO<sub>2</sub> and we find that in most regions, annual mean CO<sub>2</sub> flux densities are comparable in sign and magnitude to those of the adjacent open ocean except for river dominated systems. Globally, coastal regions act as a CO<sub>2</sub> sink with a more intense uptake occurring in summer because of the disproportionate influence of high latitude coastal seas in the Northern Hemisphere. The majority of the coastal seasonal FCO<sub>2</sub> variations stems from the air-sea pCO<sub>2</sub> gradient, although changes in wind speed and sea-ice cover can also be significant regionally. To investigate further the drivers of the spatio-seasonal variability, our observation-based pCO<sub>2</sub> climatology is used in conjunction with global ocean biogeochemistry model MOM6-COBALT. The model outputs allow us to quantify the respective contributions of thermal effects, biology, and non-thermal physical processes (circulation and freshwater inputs) to seasonal variations in coastal pCO<sub>2</sub>. Generally, biological activity is the dominant driver of the pCO<sub>2</sub> seasonal variability in temperate and high latitudes while thermal and non-thermal physical processes dominate in low latitudes.</p>

scholarly journals Seasonality of sporadic physical processes driving temperature and nutrient high-frequency variability in the coastal ocean off southeast Australia

2014 ◽  
Vol 119 (1) ◽  
pp. 445-460 ◽  
Author(s):  
Vincent Rossi ◽  
Amandine Schaeffer ◽  
Julie Wood ◽  
Guillaume Galibert ◽  
Brad Morris ◽  
...  
Keyword(s):  
High Frequency ◽  
Coastal Ocean ◽  
Physical Processes ◽  
Southeast Australia ◽  
High Frequency Variability

Coastal ocean physical processes

1987 ◽  
Vol 25 (2) ◽  
pp. 204 ◽  
Author(s):  
Kenneth H. Brink
Keyword(s):  
Coastal Ocean ◽  
Physical Processes

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

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