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Continental United States Atmospheric Wet Calcium Deposition and Soil Inorganic Carbon Stocks.
- Source :
-
Soil Science Society of America Journal . May/Jun2009, Vol. 73 Issue 3, p989-994. 6p. 2 Charts, 1 Graph. - Publication Year :
- 2009
-
Abstract
- Organic and inorganic soil C pools are major components of the global C budget, yet they are still poorly estimated and understood. This study ranked atmospheric wet Ca2+ deposition from 1994 to 2003 within the continental United States by soil order using spatial analysis of Ca2+ wet deposition data and a state soil geographic database. The total average annual atmospheric wet deposition (AAAWD) of Ca2+ within the continental United States was 8.6 x 108 kg, which would be equivalent to the theoretical formation of 2.6 x 108 kg C as soil inorganic C (SIC), barring losses from erosion and deep leaching. The soil orders receiving the highest area-normalized total AAAWD of Ca2+ were: (i) Alfisols (172 kg km-2 Ca2+), (ii) Mollisols (170 kg km-2 Ca2+), (iii) Histosols (168 kg km-2 Ca2+, and (iv) Vertisols (157 kg km-2 Ca2+). Barring losses from erosion and leaching, these Ca2+ wet deposition fluxes would equate to the theoretical formation of the following amounts of area-normalized total C equivalents in the pedon: (i) Alfisols, 52 kg C km-2 (ii) Mollisols, 51 kg C km-2 (iii) Histosols, 50 kg C km-2 and (iv) Vertisols, 47 kg C km-2. The sequestration of SIC has been shown to be important in soil orders of nonarid regions, particularly in Mollisols and Aluisols. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03615995
- Volume :
- 73
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Soil Science Society of America Journal
- Publication Type :
- Academic Journal
- Accession number :
- 39787603
- Full Text :
- https://doi.org/10.2136/sssaj2008.0004