Evaluation of the role of main teleconnection patterns
This catalog provides an analysis of the role of the three dominant modes of global climate variability, including the El Niño-Southern Oscillation (ENSO) and the Northern and Southern Annular Modes (NAM, SAM).
Approach: Backward tracking from the target region
Temporal scale: ENSO: Semiannual periods: ONDJFM and AMJJAS
NAM: boreal winter (DJFM)
SAM: austral winter (ASON)
Patterns: Modifications of the moisture sources for the composites of eight extreme years of each mode
Data to calculate the composites: we selected the 8 highest intensity episodes
ENSO: Oceanic Niño Index (ONI)
El Niño: 1982-83, 86-87, 91-92, 94-95, 97-98, 02-03, 04-05, 09-10
La Niña: 1984-85, 88-89, 95-96, 98-99, 99-00, 07-08, 10-11, 11-12
NAM: Hurrell wintertime SLP-based Northern Annular Mode Index (NAMI)
Higher values of NAMI: 1989, 90, 92, 93, 2000, 02, 07, 08
Lower values of NAMI: 1985, 86, 87, 96, 2001, 06, 10, 11
SAM: Marshall wintertime Observation-based Southern Annular Mode Index (SAMI)
Higher values of SAMI: 1983, 85, 86, 93, 98, 99, 2001, 10
Lower values of SAMI: 1980, 1996, 97, 2000, 02, 07, 09, 11
