Rectification of the MJO into the ENSO cycle
Rectification of the MJO into the ENSO cycle
Slides shown during talk combining two MJO papers:
Kessler, W.S. and R. Kleeman, 2000: Rectification of the MJO into the ENSO cycle. J.Climate, 13, 3560-3575.
Kessler, W.S., 2001: EOF representations of the MJO and its connection with ENSO. J.Climate, 14, 3055-3061.
Comments are welcome! william.s.kessler@noaa.gov
Rectification of the MJO
- Introductory slide
- MJO introduction: Fig. 16 from: Madden and Julian, J.Atmos.Sci., 1972, p1122; and Fig. 1 from Rui and Wang, J.Atmos.Sci., 1990, p358
- SST, zonal wind and OLR along the equator during the onset of the 1997-98 El Niño (Windspeed instead of OLR)
Digress here to discuss indices of MJO activity and El Niño (see below).
- OLR intraseasonal RMS and the Southern Oscillation Index
- Description of the OGCM
- Idealized MJO zonal wind anomalies on the equator imposed in the OGCM
- Rectified SST and surface current on the equator due to MJOs
- Surface current differences due to MJOs (average over year 4) (map)
- Divergence of zonal momentum flux due to oscillating zonal winds
- Mean vector winds and windspeed from the ECMWF reanalysis
- Wind stress and latent heat flux in the W Pacific warm pool. Compare climatological and MJO OGCM runs
- Vertical advection under oscillating winds
- Mean model heat flux terms due to MJOs
- Introductory slide for coupled model
- SST on the equator in the coupled model. Compare control forecast and MJO run
- Conclusion slide
Digression on indices of MJO activity and ENSO
- Introduction slide
- Example of MJO and ENSO indices from Slingo et al (1999)
- Interannual RMS of intraseasonal OLR
- EOFs 1-3 of intraseasonal OLR
- Running correlation between EOFs 1 and 3 of intraseasonal OLR and the SOI
- Rotated EOFs of intraseasonal OLR
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