Jin 97 discharge-recharge mode during the 1997-98 El Niño

1. Mean Z20   Interannual RMS Z20
2. Meinen/McPhaden (2000) Fig 1 (recharge-discharge schematic)   Slide for talk
3. Warm water volume tilting and discharge time series (EOFs are better, see below)
4. Z20 EOFs:
   1. Spatial patterns
   2. PC timeseries   PC comparisons
   3. Check EOFs omitting 82-83 and/or 97-98: EOFs 1980-1996   EOFs 1985-1996   PCs
   4. Discharge/tilting phase ellipses: Orbits   Another version   Phase lines
   5. Comparable plots from SOI and WWV directly: Timeseries   Phase orbits
   6. Comparable plots from Nino3 SST and WWV directly: 
      1. Timeseries   Phase orbits (7MRM)   Detail near UL quadrant   Lag correlations
      2. Phaselines   Histogram of phases   Radial histogram   Persistence of amplitude from previous phase   
         Angular speed: Angle and speed   Speed lineplot   Radial plot   (larger intervals)   
         A mean cycle: Low-amplitude blanking   Include all data
      3. Lags between events as a function of amplitude:  El Niños vs previous SSTA
      4. Annual cycle: Time series   Orbits   
         Total fields: Time series with overlaid annual cycle   Orbits (Total fields)
      5. West Pacific Volume vs Nino3 SST: Timeseries   Orbits   
      6. Timeseries of SST, WWV and Taux   Tau-x and Nino3 SST (1960-2002)   Taux and WWV orbits
      7. Use mean Z20 not WWV: Timeseries   (Scaled)   Orbits   Persistence over 1/4 cycle   
      8. Compare smoothed and unsmoothed evolution during 91-92 and 02-03
   7. Lag correlation between PCs 1 and 2
   8. EOF histograms: Distribution of values   Radial frequency distribution
   9. EOF transports: Vectors   Meridional   Scaled meridional
   10. Evolution reconstructed from EOFs: 8 phases   Line plot   V2   Mean Z20 +/- EOF 1
   11. EOFs of BMRC Z20 averaged over 5°S-5°N: EOFs   PCs  (7-month running mean data)
             From unsmoothed data: EOFs   PCs    Compare smoothing
5. Anomaly time series:
   1. ERS Tau-x anomalies: 1996-2000   (from av ann cyc)   1991-2000   
   2. BMRC Z20 anomalies: 1996-2000   (from av ann cyc)   1980-2002   (overlay speed lines)
           Estimated error (x,t)   Average error (x,y)   RMS(x)
           Compare EOF reconstruction: EOFs 1+2   1-yr running mean   Obs minus reconstruction    
           (x,t) off-equatorial sections: 12°-8°S   10°-6°S   8°-4°S   4°-8°N   6°-10°N   8°-12°N   
           (y,t) sections: 150°E-180°   180°-150°W   150°W-120°W   
   3. BMRC SST anomalies: 1996-2000   (from av ann cyc)   1980-2002   
   4. Reynolds SST anomalies: 1996-2000   (from av ann cyc)   1980-2002   
   5. FSU winds: 1991-2000 (Compare ERS)   1980-2000
6. Intervariable comparisons: 
   1. Tau-x vs d(SST)/dx: 1996-2000   1991-2000
   2. SST and Z20: 1996-2000   1981-2001 (weak filter)   1981-2001 (1-yr running mean)
   3. Z20 and Tau-x: 1-yr running mean
   4. Comparisons using FSU winds: vs Reynolds d(SST)/dx   vs BMRC Z20
   5. Correlations: FSU Tau-x vs Reynolds d(SST)/dx   FSU Tau-x vs BMRC Z20
7. A check: Compare 5°S-5°N vs Eq Z20 anomalies
8. Jin schematic modes during 97-98, shown from T(z) and ERS wind data:
   Max recharge (Jan-Mar 97)   
   Max El Niño tilting (Sep-Nov 97)   
   Max discharge (Jul-Sep 98)   
   Max La Niña tilting (Jan-Mar 00)   Also see Mar-May 99)