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Work Package 2

Work Package 2. WORK PACKAGE 2 BIOSPHERE-ATMOSPHERE INTERACTIONS Colin Prentice (Leader) Rita Wania (PhD candidate) Renato Spahni (Visiting Fellow) Pru Foster (Coordinator) ). Where we are at. Identified the inputs and outputs to biosphere (mostly)

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Work Package 2

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  1. Work Package 2 WORK PACKAGE 2 BIOSPHERE-ATMOSPHERE INTERACTIONS Colin Prentice (Leader) Rita Wania (PhD candidate) Renato Spahni (Visiting Fellow) Pru Foster (Coordinator) )

  2. Where we are at Identified the inputs and outputs to biosphere (mostly) Determined techniques for quantifying outputs (mostly) Gathering existing versions of LPJ Thonicke’s SPITFIRE Xu Ri’s N cycle Arneth’s isoprene emissions Scholze’s isotopes On going work Wania soil temp, permafrost, moisture profile and CH4 Spahni tropical wetlands ???? Programmer to merge LPJ versions

  3. Basic LPJ

  4. basis lpj explained

  5. PFT simulation Sitch et al., 2003

  6. Soil Moisture Sitch et al., 2003

  7. CO2 concentration Sitch et al., 2003

  8. LPJ for HYMN

  9. soil

  10. isoprenes

  11. wetlands

  12. spitfire

  13. nox out

  14. nox in

  15. outstanding questions

  16. references

  17. Questions and comments Are plants a source of methane (Keppler et al, Nature 2006) Apparently not! (Dueck et al, New Phytologist 2007) Are wetland soils a source of H2 and what to do about N2O? How much time is spent in the burning versus the smoldering phase of fires? (USDA) Do we need a rice PFT? No … should follow agricultural practices anyway EDGAR E… ??

  18. Questions for Discussion What do the CTMs do about NOx deposition? Stomatal conductance, LAI, roughness length What about O3 uptake? Non-stomatal uptake, what veg characteristics are important? Are the hydrocarbons important for chemistry or aerosols? Emission factors for burning veg (Andreae & Merlet GCB 2001) Do you want methanol & ORVOCs? (Lathiere AC P 2006, GRL 2005) Isotopes Do any of the CTMs consider C isotopes (O?, H?) LPJ SPITFIRE has C isotopes

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