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Soil inorganic carbon(SIC)stocks continuously change from the formation of pedogenic carbonates,a process requiring inputs of Ca2+and Mg2+ions.This study ranked the soil orders in terms of potential inorganic carbon sequestration resulting from wet Ca2+and Mg2+deposition from 1994 to 2003 within the continental United States.The analysis revealed that average annual atmospheric wet deposition of Ca2+and Mg2+was the highest in the Central Midwest-Great Plains region,likely due to soil particle input from loess-derived soils.The soil orders receiving the highest total average annual atmospheric wet Ca2+and Mg2+deposition,expressed as potential inorganic carbon formation(barring losses from erosion and leaching),were:1)Mollisols(1.1×108kg C),2)Alfisols(8.4×107kg C),3)Entisols(3.8×107kg C),and 4)Aridisols(2.8×107kg C).In terms of area-normalized result,the soil orders were ranked:1)Histosols(73 kg C km-2),2)Alfisols and Vertisols(64 kg C km-2),3)Mollisols(62 kg C km-2),and 4)Spodosols(52 kg C km-2).The results of this study provide an estimate of potential soil inorganic carbon sequestration as a result of atmospheric wet Ca2+and Mg2+deposition,and this information may be useful in assessing dynamic nature of soil inorganic carbon pools.
Soil inorganic carbon (SIC) stocks continuously change from the formation of pedogenic carbonates, a process requiring inputs of Ca2 + and Mg2 + ions. This study ranked the soil orders in terms of potential inorganic carbon sequestration results from wet Ca2 + and Mg2 + deposition from 1994 to 2003 within the continental United States. The analysis revealed that average annual atmospheric wet deposition of Ca2 + and Mg2 + was the highest in the Central Midwest-Great Plains region, likely due to soil particle input from loess-derived soils. soil orders receiving the highest total average annual atmospheric wet Ca 2+ and Mg 2+ deposition, expressed as potential inorganic carbon formation (barring losses from erosion and leaching), were: 1) Mollisols (1.1 × 108 kg C), 2) Alfisols (8.4 × 107 kg C), 3) Entisols (3.8 x 107 kg C), and 4) Aridisols (2.8 x 107 kg C). In terms of area-normalized result, the soil orders were ranked: 1) , 2) Alfisols and Vertisols (64 kg C km-2), 3) Mollisols (62 kg C km-2), and 4) Spodosols 52 kg C km-2). The results of this study provide an estimate of potential soil inorganic carbon sequestration as a result of atmospheric wet Ca2 + and Mg2 + deposition, and this information may be useful in assessing dynamic nature of soil inorganic carbon pools. .