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Noaa CPC merged analysis

The relationship between the location of the intertropical convergence zone (ITCZ) and atmospheric heat transport across the equator. Aaron Donohoe , John Marshall, David Ferreira, and David McGee ---- MIT. Noaa CPC merged analysis.

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Noaa CPC merged analysis

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  1. The relationship between the location of the intertropical convergence zone (ITCZ) and atmospheric heat transport across the equator Aaron Donohoe, John Marshall, David Ferreira, and David McGee ---- MIT Noaa CPC merged analysis

  2. Annual mean Hadley Celland it’s relationship to precipitation and heat transport NCEP reanalysis, Noaa CPC merged analysis

  3. Observed Hemispheric Energy Budget Marshall, Donohoe, Ferreira, In Prep

  4. Solstice Seasons Annual average is the small residual of Nearly canceling seasonal extremes

  5. Seasonal cycle of ITCZ location and AHTEQ Slope is -2.7 +/-0.6 degree latitude per PW

  6. 3. Climate Perturbation experiments Mid Holocene (6Kyear BP) Last Glacial Maximum (LGM) Martini and Chesworth CO2 Doubling Credit: Robert Johnson

  7. Ensemble mean of each experiment Slope of -3.2 degrees latitude per PW

  8. LGM Energetics AHTEQ change By processes included : Surface albedo only: 1.3 PW Atmospheric SW opacity: 0.6 PW SW cloud feedback : 0.43 PW Planck (OLR) Feedback : 0.11 PW OHT change: 0.12 PW

  9. Conclusions • The ITCZ location and atmospheric heat transport at the equator are highly correlated • Over the seasonal cycle • In the annual mean shift due to climate perturbations • A 3 degree latitude ITCZ shift requires 1 PW of AHTEQ  It’s hard to move the ITCZ more than a couple degrees because the required large scale energy flux perturbations are hard to obtain

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