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A Maloney Group, Weak Temperature Gradient Balance Perspective. Large-scale circulation response alters moisture field. Precipitation is a strong increasing, non-linear function of lower free tropospheric humidity. ????. MJO.
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A Maloney Group, Weak Temperature Gradient Balance Perspective
Large-scale circulation response alters moisture field Precipitation is a strong increasing, non-linear function of lower free tropospheric humidity ???? MJO Diabatic heating profile result of integrated effects of cloud population and radiation Diabatic heating structure influences large-scale circulation response
SLHF OLR in ERAi Eddy Mixing import neutral/export export
What is the phase relation of these terms? Do the answers to these questions change dramatically with location? What terms are dominant?
pole-equator moisture gradient westerly mean state west-east moisture gradient easterly mean state east-west moisture gradient easterlies poleward of ~7.5°
Where is the MJO? The RMM index only gives us a rough estimate At what phase is the MJO “directly over” the DYNAMO domain? How about TOGA-COARE?
90° gridpoint phase 180° 0° 270° each gridpoint has its own “phase”
90° RMM phase gridpoint phase 180° 0° 270° corresponds to RMM phase of maximum (+) MJO related anomaly in a variable EX: for zonal wind this corresponds to maximum westerly winds
90° gridpoint phase 180° 0° RMM phase 270° corresponds to RMM phase of maximum (-) MJO related anomaly in a variable EX: for zonal wind this corresponds to maximum easterly winds
45°prior to maximum (+) anomaly 90° RMM phase gridpoint phase 180° 0° 270° Tells you where you are in MJO lifecycle
45°after maximum (+) anomaly 90° RMM phase gridpoint phase 180° 0° 270° Tells you where you are in MJO lifecycle
DYNAMO TOGA-COARE Identifies at what “RMM” phase <q> maximizes at each location Objectively calculated from EOF structure
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
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<q> (850-500) Peak of convection
MSE Composite Analysis RMM > 1Composite as function of MJO lifecycle at each location using new diagnostic
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
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Point #2: Phasing Matters Point #3: Mean State Matters
Suppressed Transition to Enhanced Enhanced ? ? Transition to Suppressed Suppressed
Just after peak of convection SLHF Substantial cancelation in lat. average
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
Near complete cancelation, all times, everywhere Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed Radiation Dominant….. Missing Physics?
Horizontal Advection SLHF Suppressed Transition to Enhanced Enhanced Transition to Suppressed Suppressed
Point #5: Local vs. large-scale processes at work Meridional advection is small locally and does not correspond with intraseasonal OLR maxima, but is very large in lat. average. - Conditions tropics on large scale Zonal advection and SLHF are very large locally and correspond with intraseasonal OLR maxima, but are very weak in lat. average. - Helps determine locations of maximum intraseasonal variance