How would the carbonate-silicate geochemical cycle respond to a long-term decrease in surface temperature and precipitation?

A. Carbon dioxide would accumulate in the atmosphere as the weathering rate decreased, acting as a negative feedback

B. Carbon dioxide would accumulate in the oceans as the weathering rate increased, acting as a positive feedback

C. Carbon dioxide levels would decrease in the atmosphere as the weathering rate increased, acting as a positive feedback

D. Volcanism would increase as a result of the decrease in surface precipitation, increasing carbon dioxide levels and acting as a negative feedback

Question

Geography

Markus Richard

13 July, 04:46

How would the carbonate-silicate geochemical cycle respond to a long-term decrease in surface temperature and precipitation?

A. Carbon dioxide would accumulate in the atmosphere as the weathering rate decreased, acting as a negative feedback

B. Carbon dioxide would accumulate in the oceans as the weathering rate increased, acting as a positive feedback

C. Carbon dioxide levels would decrease in the atmosphere as the weathering rate increased, acting as a positive feedback

D. Volcanism would increase as a result of the decrease in surface precipitation, increasing carbon dioxide levels and acting as a negative feedback

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Answers (1)

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Yasmine Thomas · Answer 1

C. Carbon dioxide levels would decrease in the atmosphere as the weathering rate increased, acting as a positive feedback

Explanation:

The CO₂ concentration decreases due to large scale weathering process of silicate and carbonate weathering. The weathering of silicate and carbonates affect this way. As CO₂ in the atmosphere decreases the global temperature decreases, resulting in global cooling or ice age. During ice age we will have less precipitation.