Recent change of Arctic tundra ecosystems from a net carbon dioxide sink to a source

@article{Oechel1993RecentCO,
  title={Recent change of Arctic tundra ecosystems from a net carbon dioxide sink to a source},
  author={Walter C. Oechel and Steven J. Hastings and George Vourlrtis and Michael A. Jenkins and George H. Riechers and Nancy E. Grulke},
  journal={Nature},
  year={1993},
  volume={361},
  pages={520-523}
}
ARCTIC tundra has been a net sink for carbon dioxide during historic and recent geological times1–4, and large amounts of carbon are stored in the soils of northern ecosystems. Many regions of the Arctic are warmer now than they have been in the past5–10, and this warming may cause the soil to change from a carbon dioxide sink to a source by lowering the water table11–12, thereby accelerating the rate of soil decomposition (CO2 source)3,13–15 so that this dominates over photosynthesis (CO2 sink… 
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References

SHOWING 1-10 OF 22 REFERENCES
Arctic Lakes and Streams as Gas Conduits to the Atmosphere: Implications for Tundra Carbon Budgets
TLDR
Current estimates of the arctic terrestrial sink for atmospheric CO2 may be 20 percent too high, according to measurements of the partial pressure of CO2 in 29 aquatic ecosystems across arctic Alaska.
Simulating carbon accumulation in northern ecosystems
A model of the carbon balance in arctic and boreal forests has been developed to estimate the effects of higher carbon diox ide levels in the atmosphere on northern ecosystems. The model predicts
Northern Peatlands: Role in the Carbon Cycle and Probable Responses to Climatic Warming.
  • E. Gorham
  • Environmental Science
    Ecological applications : a publication of the Ecological Society of America
  • 1991
TLDR
Satellite-monitoring of the abundance of open water in the peatlands of the West Siberian Plain and the Hudson/James Bay Lowland is suggested as a likely method of detecting early effects of climatic warming upon boreal and subarctic peatland environments.
Carbon-13 and Carbon-14 Abundances in Alaskan Aquatic Organisms: Delayed Production from Peat in Arctic Food Webs
TLDR
The lack of functionally analogous abundant marine prey organisms may explain why peat carbon is not efficiently transferred to apical food web species in the marine environment.
A perturbation simulation of CO2 uptake in an ocean general circulation model
The uptake of anthropogenic CO2 by the ocean is simulated using a perturbation approach in a three-dimensional global general circulation model. Atmospheric pCO2 is prescribed for the period
CO 2 Exchange over the Alaskan Arctic Tundra: Meteorological Assessment by an Aerodynamic Method
Photosynthesis, which incorporates solar energy into stored chemical energy, is the foundation of ecosystem function. Kinetic characterization of primary productivity is therefore paramount to
Climate Model Simulations of the Equilibrium Climatic Response to Increased Carbon Dioxide (Paper 6R0726)
The first assessments of the potential climatic effects of increased CO2 were performed using simplified climate models, namely, energy balance models (EBMs) and radiative-convective models (RCMs). A
Observational Contrains on the Global Atmospheric Co2 Budget
TLDR
The observed differences between the partial pressure of CO2 in the surface waters of the Northern Hemisphere and the atmosphere are too small for the oceans to be the major sink of fossil fuel CO2, and a large amount of the CO2 is apparently absorbed on the continents by terrestrial ecosystems.
The Limits to Peat Bog Growth
Not less than 2% of the Earth's land surface is peat-covered, so it is important to try to understand the dynamics of peat accumulation. Peat-forming systems (mires) accumulate peat because
Scenario for a warm, high-CO2 world
Plausible patterns for temperature and precipitation changes accompanying a general global warming, such as might occur due to a large increase in atmospheric carbon dioxide levels, are presented.
...
1
2
3
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