About Us | Help Videos | Contact Us | Subscriptions

Soil Science Society of America Journal Abstract - PEDOLOGY

Continental United States Atmospheric Wet Calcium Deposition and Soil Inorganic Carbon Stocks


This article in SSSAJ

  1. Vol. 73 No. 3, p. 989-994
    Received: Jan 9, 2008

    * Corresponding author(s): john.galbraith@vt.edu
Request Permissions

  1. Megan A. Goddarda,
  2. Elena A. Mikhailovaa,
  3. Christopher J. Posta,
  4. Mark A. Schlautmanb and
  5. John M. Galbraith *c
  1. a Dep. of Forestry and Natural Resources, Clemson Univ., Clemson, SC 29634-0359
    b Dep. of Environmental Engineering and Earth Sciences, Clemson Univ., Anderson, SC 29625-6510
    c Dep. of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA 24061-0404


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 × 108 kg, which would be equivalent to the theoretical formation of 2.6 × 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 Alfisols.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2009. Soil Science SocietySoil Science Society of America