The need for mass balance and feedback in the geochemical carbon cycle: reply

Article Abstract:

Mike J. Bickle's critique of the article 'The need for mass balance and feedback in the geochemical carbon cycle' observes that substantial sediment output in the Himalayan-Tibetan region should affect the global weathering rate. Enhanced sediment output might impact the long-term weathering rate only if it affects the amount of carbon dioxide available to weather silicon rocks. It does not follow that the amount for extra carbon dioxide for enhanced erosion-accelerated weathering will necessarily be provided in the exact amount and simultaneously by greater metamorphic de-gassing.

Economic aspects, Sedimentation and deposition, Deposition (Geology), Weathering

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The need for mass balance and feedback in the geochemical carbon cycle

Article Abstract:

Edmond et al. conducted a study on the geochemical carbon cycle. Geochemical or long term carbon cycle consists of carbon dioxide (CO2) exchange between rocks and surficial systems which includes the combined atmosphere, soils, oceans, and biosphere. The exchange is done through the deterioration of silicates and organic matter and the thermal disintegration of carbonates and organic matter. Based on their study, it is not necessary to have a mass balance for the atmospheric CO2 inputs and outputs and there is no need for a feedback to have an equilibrium in atmospheric CO2.

Analysis, Geochemistry

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The need for mass balance and feedback in the geochemical carbon cycle: comment

Article Abstract:

The article 'The need for mass balance and feedback in the geochemical carbon cycle' by R.E. Berner and K. Caldeira tackles the issues surrounding long-term controls on atmospheric carbon dioxide levels and the need for and nature of the feedback mechanism between atmospheric carbon dioxide and climate. While their arguments are plausible, the authors have overlooked a significant subtlety in climate control by mountain uplift, which may have essential ramifications for long-term variations in global climate.

Weather, Climatic changes, Climate change, Mountains, Weather, Influence of mountains on

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