scholarly journals Carbon dioxide fluxes across the air-water interface and its impact on carbon availability in aquatic systems

1995 ◽  
Vol 40 (4) ◽  
pp. 690-699 ◽  
Author(s):  
Robert Portielje ◽  
Lambertus LiJklema
Keyword(s):  
Carbon Dioxide ◽  
Aquatic Systems ◽  
Water Interface ◽  
Carbon Dioxide Fluxes ◽  
Carbon Availability ◽  
Air Water Interface

Carbon dioxide partial pressure and carbon fluxes of air-water interface in Taihu Lake, China

2005 ◽  
Vol 23 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Fan Chengxin ◽  
Hu Weiping ◽  
Phillip W. Ford ◽  
Chen Yuwei ◽  
Qu Wenchuan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Taihu Lake ◽  
Carbon Fluxes ◽  
Carbon Dioxide Partial Pressure ◽  
Water Interface ◽  
Air Water Interface

Diffusion of Carbon Dioxide through Charged Monolayers at the Air/Water Interface

Nature ◽  
1966 ◽  
Vol 212 (5064) ◽  
pp. 810-811 ◽  
Author(s):  
J. G. HAWKE ◽  
H. J. L. WRIGHT
Keyword(s):  
Carbon Dioxide ◽  
Water Interface ◽  
Air Water Interface

Kinetics of carbon dioxide transfer across the air/water interface

1984 ◽  
Vol 77 ◽  
pp. 33 ◽  
Author(s):  
William A. House ◽  
John R. Howard ◽  
Geoffrey Skirrow
Keyword(s):  
Carbon Dioxide ◽  
Water Interface ◽  
Air Water Interface ◽  
Kinetics Of

Seasonal dynamics of carbon dioxide and methane in two clear-water lakes and two bog lakes in northern Wisconsin, U.S.A.

1999 ◽  
Vol 56 (2) ◽  
pp. 265-274 ◽  
Author(s):  
Joan L Riera ◽  
John E Schindler ◽  
Tim K Kratz
Keyword(s):  
Carbon Dioxide ◽  
Carbon Pools ◽  
Seasonal Patterns ◽  
Water Interface ◽  
Carbon Turnover ◽  
Turnover Rates ◽  
Clear Water ◽  
Allochthonous Inputs ◽  
Air Water Interface ◽  
Bog Lakes

We investigated carbon dynamics in the water column and CO2 and CH4 exchange across the air-water interface in four closed-basin lakes in northern Wisconsin: two with clear, low dissolved organic carbon (DOC) waters and two bog lakes with stained, high-DOC waters. Clear-water lakes quickly became undersaturated following ice-out and remained undersaturated until fall turnover. Bog lakes were supersaturated in CO2 throughout the ice-free season, although surface CO2 concentrations dropped sharply following ice-out and increased again during autumn turnover. Differences in seasonal patterns of CO2 were attributed to morphometry and the timing and intensity of mixing events. Ice-free season fluxes of CO2 were 6.7 and 10.0 mol·m-2 in the bog lakes and 1.2 and 0.09 mol·m-2 in the clear-water lakes. Fluxes of CH4 were significant only immediately after ice-out and during autumn turnover and were <0.4 mol·m-2 in the bog lakes and <0.05 mol·m-2 in the clear-water lakes. Compared with changes in carbon pools in the lakes, our results indicate rapid carbon turnover rates in bog lakes, as opposed to clear-water lakes. We suggest that allochthonous inputs of CO2 may be responsible for this rapid turnover.

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.

Chemical reactivity of organized monolayers at the air-water interface

1988 ◽  
Vol 85 ◽  
pp. 1041-1045 ◽  
Author(s):  
Rolf Loschek ◽  
Dietmar Mobius
Keyword(s):  
Chemical Reactivity ◽  
Water Interface ◽  
Air Water Interface
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