Atmospheric exchange of carbon dioxide in a low‐wind oligotrophic lake measured by the addition of SF6

@article{Cole1998AtmosphericEO,
  title={Atmospheric exchange of carbon dioxide in a low‐wind oligotrophic lake measured by the addition of SF6},
  author={Jonathan J. Cole and Nina F. Caraco},
  journal={Limnology and Oceanography},
  year={1998},
  volume={43}
}
  • J. ColeN. Caraco
  • Published 1 June 1998
  • Environmental Science
  • Limnology and Oceanography
Many freshwater lakes are supersaturated in CO2 with respect to the atmosphere. This concentration gradient implies a net flux of CO2 from the water to the air. The actual rate of gas exchange is governed by both this concentration gradient and the gas transfer coefficient, k. To directly measure k, we added the chemically and biologically inert gas, sulfur hexaflouride (SF6), to the epilimnion of Mirror Lake, New Hampshire, a small (15 ha), low‐wind softwater lake. k was independent of wind… 

Thermal enhancement of gas transfer velocity of CO2 in an Amazon floodplain lake revealed by eddy covariance measurements

In November 2011, the partial pressures of carbon dioxide (pCO2) in water and air in a floodplain lake of the Amazon River in Brazil were 800 ± 75 and 387 ± 8 ppmv, respectively. Turbulent CO2 fluxes

Diel cycle of lake‐air CO2 flux from a shallow lake and the impact of waterside convection on the transfer velocity

Two years of eddy covariance measurements of lake carbon dioxide (CO2) fluxes reveal a diel cycle with higher fluxes during night. Measurements of partial pressure in the air (pCO2a) and in the water

Carbon dioxide supersaturation in peatland waters and its contribution to atmospheric efflux from downstream boreal lakes

[1] Carbon fluxes at two boreal peatland-dominated catchments in northeastern Alberta were investigated through the analysis of fen and lake water chemistry and the measurement of partial pressure of

Carbon and oxygen fluxes from a small pond to the atmosphere: Temporal variability and the CO2/O2 imbalance

Because of the relative strength of sediment processes compared to water column processes, natural and anthropogenic ponds represent an important component of the terrestrial hydrologic cycle and a

Effects of long-term climate trends on the methane and CO2 exchange processes of Toolik Lake, Alaska

Methane and carbon dioxide effluxes from aquatic systems in the Arctic will affect and likely amplify global change. As permafrost thaws in a warming world, more dissolved organic carbon (DOC) and

Air-water oxygen exchange in a large whitewater river

Air – water gas exchange governs fluxes of gas into and out of aquatic ecosystems. Knowing this flux is necessary to calculate gas budgets (i.e., O2) to estimate whole-ecosystem metabolism and

Gas transfer velocities in small forested ponds

Inland waters actively exchange gases with the atmosphere, and the gas exchange rate informs system biogeochemistry, ecology, and global carbon budgets. Gas exchange in medium‐ to large‐sized lakes

Enhancing surface methane fluxes from an oligotrophic lake: exploring the microbubble hypothesis.

Investigation of the fluxes of these two gases across the surface of oligotrophic Lake Stechlin using a floating chamber approach determined that an average of 145 L m(–2) d(–1) of gas is required to exit the surface layer via microbubbles to produce the observed elevated k600,CH4.

Gas transfer velocities of CO2 and CH4 in a tropical reservoir and its river downstream

Atmospheric CO2 Exchange of a Small Mountain Lake: Limitations of Eddy Covariance and Boundary Layer Modeling Methods in Complex Terrain

Lakes receive and transform significant amounts of terrestrial carbon and are often considered a source of atmospheric carbon dioxide (CO2). Yet, continuous direct measurements of lake‐atmosphere CO2
...

References

SHOWING 1-10 OF 77 REFERENCES

Gas Exchange, Photosynthetic Uptake, and Carbon Budget for a Radiocarbon Addition to a Small Enclosure in a Stratified Lake

Two significant features of the carbon budget during the course of the experiment were the large net outflux of CO2 from the corral and the doubling of the total disso...

Carbon dioxide concentration and atmospheric flux in the Hudson River

Combining the measurements with recent experimental studies of gas exchange in the Hudson, it is estimated that the Hudson releases CO2 at a rate of 70–162 g C m−2 yr−1 from the river to the atmosphere.

The role of gas exchange in the inorganic carbon, oxygen, and 222Rn budgets of the Amazon River'

Dissolved oxygen, ***Rn, pC02, alkalinity, respiration rate, and discharge have been measured at eight mainstem and seven tributary stations during February-March 1984 in a 1,700-km stretch of the

Atmospheric oxygen exchange in the Hudson River: Dome measurements and comparison with other natural waters

The measurement of metabolism using diel free-water oxygen techniques requires the estimation of atmospheric oxygen exchanges. We measured such exchange on nine different occasions in the freshwater,

Carbon Dioxide Supersaturation in the Surface Waters of Lakes

Lakes are a small but potentially important conduit for carbon from terrestrial sources to the atmospheric sink, and the potential efflux of CO2 from lakes is about half as large as riverine transport of organic plus inorganic carbon to the ocean.

Gas exchange on Mono Lake and Crowley Lake, California

Gas exchange coefficients have been determined for freshwater Crowley Lake and for saline Mono Lake through the use of a man-made purposefully injected gas, sulfur hexafluoride (SF6). The

Air–sea gas exchange in rough and stormy seas measured by a dual-tracer technique

THE transfer of dissolved atmospheric gases across the air/sea interface is a strong function of wind speed and state of the sea surface. The form of the dependence on wind velocities is needed to

Gas transfer velocities in lakes measured with SF6

The experimentally-determined relationships between air-water gas transfer velocity and windspeed are presented for two small, rapidly wind mixed lakes in upland SW England. High-precision estimates

Tropospheric methane from an Amazonian floodplain lake

During July and August 1985, the sources of methane and its flux to the troposphere were measured from a houseboat laboratory anchored in Lago Calado, a stratified, dendritic lake of about 6 km

Carbon budget for a groundwater-fed lake: Calcification supports summer photosynthesis

A chemical budget analysis for Williams Lake, Minnesota, tracks the seasonal progression of carbon inputs and outputs. CO, exchanges with the atmosphere reverse seasonally, with uptake by the lake in
...