PDF
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PDF, data through January 2026.
Nino 3.4 data source:
NOAA Climate Prediction Center
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PDF, data through December 2025.
last modified: 2026/01/23.
PDF, data through January 2026.
NOAA explains "The difference is then adjusted so the variance equals the original Nino 3.4 index", but I didn't normalize. The NOAA's multiplication factor is ~1.2.
RONI data source:
NOAA Climate Prediction Center
, last modified: 2026/02/03.
Comparison with Global Temperature
The factor 0.104 was determined to match the standard deviations for the global and Nino3.4 temperatures for 1970-2010.
PDF Data through November 2024 used. last modified: 2024/12/19.
PDF Data through November 2024 used. last modified: 2024/12/19.
(last modified 2024/10/05)
(last modified 2024/07/10)
Temperature anomaly in GISS analysis. The base periods are shifted. (last modified: 2013/05/06)
PDF, data through January 2026, data source:
NOAA Climate Prediction Center,
last modified: 2026/02/01.
Data through January 2026.
last modified: 2026/02/03.