📊 HyCAM.qvfix.ep65.F2000.10yrs diagnostics: Variability  |  Climatology vs Obs  |  Overview

Atmospheric Variability Diagnostics — HyCAM.qvfix.ep65.F2000.10yrs

Wheeler-Kiladis spectra + CLIVAR-MJO suite (lag cross-correlation, combined EOF, composite life cycle, seasonal wavenumber-frequency). Daily/6-hourly model output; anomalies = smoothed-climatology removed, 20-100 day band-pass. Obs reference = ERA-Interim (US-CLIVAR MJO-suite / MDTF digest) for OLR & winds + TRMM for precip, now shown alongside a period-matched ERA5 (1991-2005) column (green accent) processed through the official mjoclivar suite. model ERA-Interim / TRMM ERA5 1991-2005

1. Lag cross-correlation (IO precip base; lag-lon top, lag-lat bottom)

Eastward tilt = eastward MJO propagation; precip (color), U850 (contours).

HyCAM.qvfix.ep65.F2000.10yrs winter
ERA-Interim winter
ERA5 winter (OLR-U850)
HyCAM.qvfix.ep65.F2000.10yrs summer
ERA-Interim summer
ERA5 summer (OLR-U850)
HyCAM.qvfix.ep65.F2000.10yrs annual
ERA-Interim annual
ERA5 annual (OLR-U850)

2. EOF analysis of OLR / U850 / U200 (15S-15N)

Top: combined multivariate EOF1 & EOF2 (the MJO mode pair, longitudinal structure). Below: per-variable seasonal EOF spatial maps — model vs ERA.

HyCAM.qvfix.ep65.F2000.10yrs combined EOF1&2
ERA5 combined EOF
Winter EOF spatial maps (EOF 1-4):
HyCAM.qvfix.ep65.F2000.10yrs OLR
ERA-I OLR
ERA5 OLR
HyCAM.qvfix.ep65.F2000.10yrs U850
ERA-I U850
ERA5 U850
HyCAM.qvfix.ep65.F2000.10yrs U200
ERA-I U200
ERA5 U200
Summer EOF spatial maps (EOF 1-4):
HyCAM.qvfix.ep65.F2000.10yrs OLR
ERA-I OLR
ERA5 OLR
HyCAM.qvfix.ep65.F2000.10yrs U850
ERA-I U850
ERA5 U850
HyCAM.qvfix.ep65.F2000.10yrs U200
ERA-I U200
ERA5 U200

3. Composite life cycle (8 MJO phases; OLR anom + 850-hPa wind)

Rows = 8 MJO phases; OLR anomaly (color) + 850-hPa wind (vectors); days with MJO index > 1. Model paired with the ERA-Interim composite for each season. The Nov-Apr (boreal-winter) life cycle is the canonical MJO season — an eastward-marching dipole from the Indian Ocean (P1-3) into the Maritime Continent / West Pacific (P4-7) signals a realistic MJO.

Summer (May-Oct):
HyCAM.qvfix.ep65.F2000.10yrs summer (May-Oct)
ERA-Interim summer (May-Oct)
ERA5 summer (May-Oct)
Winter (Nov-Apr):
HyCAM.qvfix.ep65.F2000.10yrs winter (Nov-Apr)
ERA-Interim winter (Nov-Apr)
ERA5 winter (Nov-Apr)

4. Seasonal wavenumber-frequency spectra (per variable, 15S-15N)

Eastward (positive freq) MJO band at wavenumber 1, 30-80 day.

Winter:
HyCAM.qvfix.ep65.F2000.10yrs OLR
ERA-I OLR
ERA5 OLR
HyCAM.qvfix.ep65.F2000.10yrs U850
ERA-I U850
ERA5 U850
HyCAM.qvfix.ep65.F2000.10yrs U200
ERA-I U200
ERA5 U200
HyCAM.qvfix.ep65.F2000.10yrs PRECT
TRMM PRECT
Summer:
HyCAM.qvfix.ep65.F2000.10yrs OLR
ERA-I OLR
ERA5 OLR
HyCAM.qvfix.ep65.F2000.10yrs U850
ERA-I U850
ERA5 U850
HyCAM.qvfix.ep65.F2000.10yrs U200
ERA-I U200
ERA5 U200
HyCAM.qvfix.ep65.F2000.10yrs PRECT
TRMM PRECT

5. AMWG variability package (Wheeler-Kiladis + MJO index + χ200)

Full Wheeler-Kiladis wavenumber-frequency spectra (raw/background/normalized, sym+asym, vs NOAA/NCEP obs) plus the MJO index line plots, χ200 velocity-potential Hovmöller, and precip-rate histogram are on the diagnostic-package pages:

Generated by run_vardiag.sh. Case=HyCAM.qvfix.ep65.F2000.10yrs. Obs ERA/TRMM reused from xsongsio (E3SM).