Modeling black carbon in the environment
Download
1 / 1

Modeling black carbon in the environment - PowerPoint PPT Presentation


  • 76 Views
  • Uploaded on

Nguyen B, Lehmann J, Hockaday WC, Joseph S, Masiello CA (2010) Temperature sensitivity of black carbon decomposition and oxidation. Environ Sci Tech DOI: 10.1021/es903016y.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Modeling black carbon in the environment' - yaholo


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Modeling black carbon in the environment

Nguyen B, Lehmann J, Hockaday WC, Joseph S, Masiello CA (2010) Temperature sensitivity of black carbon decomposition and oxidation. Environ Sci Tech DOI: 10.1021/es903016y

Major J, Lehmann J, Rondon M, Goodale C (2010a) Fate of soil-applied black carbon: downward migration, leaching and soil respiration. Glob Change Biol 16:1366-1379

Major J, Lehmann J, Rondon M, Goodale C (2010a) Fate of soil-applied black carbon: downward migration, leaching and soil respiration. Glob Change Biol 16:1366-1379

Major J, Lehmann J, Rondon M, Goodale C (2010a) Fate of soil-applied black carbon: downward migration, leaching and soil respiration. Glob Change Biol 16:1366-1379

Major J, Lehmann J, Rondon M, Goodale C (2010a) Fate of soil-applied black carbon: downward migration, leaching and soil respiration. Glob Change Biol 16:1366-1379

Major J, Lehmann J, Rondon M, Goodale C (2010a) Fate of soil-applied black carbon: downward migration, leaching and soil respiration. Glob Change Biol 16:1366-1379

  • Black carbon (BC) is produced in fires and is assumed to be stable in the environment

  • “Biochar” is BC intentionally produced for soil amendment

  • BC has not yet been explicitly introduced into carbon turnover models

  • Here we make a simple model accounting for loss of BC by decomposition and horizontal as well as vertical movement out of the area

Results

Modeling black carbon in the environment

Lab data for decomposition

Nguyen et al., 2010 Environ Sci Tech 44, 3324–3331

Whitman , 2010 M.Sc. thesis, Cornell University

Model structure

Predicted and measured CO2 production. Data from Major et al. 2010

Field data for leaching

Predicted and measure BC in top- and sub-soil. Data from Major et al. 2010

Bente Foereid, Johannes Lehmann, Julie Major

Crop and Soil Sciences, Cornell University

Major et al., 2010

Glob Change Biol 16:1366-1379

2000 y

  • Conclusions

  • Erosion is poorly quantified, but probably the largest flux of BC out of a given area

  • A two pool model can adequately describe BC decomposition dynamics

  • Decomposition rate of the slowest carbon pool is unimportant on time-scales < 100 y

  • Downwards movement is small as a mass flux, but not the only downward flux of BC

100 y

Effect of changing parameter values, erosion rate ± 50%, slow pool turnover rate 500-5000 y, alternative values for temperature and moisture modifier

Next step – earth system model, CLM


ad