Trans-Niño Index (TNI Index)

Describes SST across tropical Pacific Ocean.

sample plot
TNI correlated with SST over the tropical Pacific Ocean.
sample plot
WRIT time-series
Description and Specifications
Description
    The timeseries is calculated from the HadISST and the NCEP OI SST Datasets. It is the standardized Nino 12 minus the Niño 4 with a 5 month running mean applied which is then standardized using the 1950-1979 period. There is now a version that just uses the HadISST. This avoids the issue where the OI SST doesn't match the HadISST.
Temporal Coverage
  • Monthly values: 1870/01 to present
  • Update Status: Monthly
Data Notes
    Units: degC
Get Data
Source, citation and related Information.
Related Time-series
    enso
Links
    none
Original Source
  • Data is from NOAA PSL using the HadISST dataset. Index was originally developed by Kevin Trenberth of NCAR/CGD. PSL is updating the index each month. This version is based on the latest HADISST and NCEP OI datasets.
Time-series source dataset(s)
  • Input data for the mode calculation is the HadISST1.1 and the NOAA OI
Citation
  • Kevin E. Trenberth and David P. Stepaniak: J. Climate, 14, 1697-1701.
References
  • Kevin E. Trenberth and David P. Stepaniak: J. Climate, 14, 1697-1701.
Analysis pages that use time-series
Analysis pages
  • WRIT correlation
  • WRIT time-series