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Effect of Physics on Chemistry

Effect of Physics on Chemistry. (Comparison of 4 deep convective schemes). Goal. Examine sensitivity of chemistry to current/proposed convective parameterizations Use offline-CAM model: feedbacks not allowed New parameterizations improve climate simulations considerable.

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Effect of Physics on Chemistry

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  1. Effect of Physics on Chemistry (Comparison of 4 deep convective schemes)

  2. Goal • Examine sensitivity of chemistry to current/proposed convective parameterizations • Use offline-CAM model: feedbacks not allowed • New parameterizations improve climate simulations considerable. • Can we use chemistry to constrain parameterizations? .

  3. Zonally Averaged JJA CO (50 to 150 ppbv, contour interval of 5 ppbv) cmt2 fvz isufz current

  4. Zonally Averaged JJA CODifferences (-8 to 20 ppbv, contour interval of 1.4 ppbv) cmt2 - fvz Isufz - fvz current - fvz

  5. Zonally Averaged Lightning NO (0 to 1.6 E4 molec/cm3/s, contour interval 1 e3) cmt2 fvz current Isufz

  6. Lightning N JJA (Tg N/year log scale .0003 to .030) cmt2 fvz isufz current

  7. Zonally Averaged JJA O3Differences (-15 to 5 ppbv, contour interval of 1 ppbv) cmt2 - fvz Isufz - fvz current - fvz

  8. Conclusions • Convective mass flux is not well constrained • Significant differences in tropics with different schemes in O3, CO… • Can we constrain with chemistry? • More work is needed to understand physics changes on the chemistry

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