explain reduction in soil formation i.e in chemical weathering
Answers
Explanation:
Chemical weathering changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock. Carbonic acid is especially effective at dissolving limestone
Chemical weathering affects hillslope form by directly removing mass from hillslopes. The transformation of primary minerals to secondary minerals can also affect the hydrology, biota, and stability of hillslopes, which in turn influence sediment transport and landscape morphology. Erosion in evolving landscapes can modulate and be modulated by chemical weathering; for example, pulses of accelerated erosion can lower the residence time of hillslope materials, thereby increasing their chemical weathering rates, which in turn accelerate the incision signal. We have presented statements of mass conservation that allow quantification of the important feedbacks between chemical weathering and hillslope form; however, many of the constitutive relationships required to solve these equations are still lacking. For example, we do not know if chemical weathering influences the efficiency of sediment transport or how it influences the rate at which soil is produced at a given soil thickness. Studies quantifying these relationships are required before we can fully understand how chemical weathering influences hillslope form and the nature of the feedbacks between chemical weathering and landscape evolution. These studies are necessary if we are to develop an integrative understanding of dynamic feedbacks between climate, biogeochemical cycles, and landscape evolution.
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