DATA SOURCE: National Institute for Water and Atmospheric Research (NIWA)
[Technical report available at www.mfe.govt.nz/publications/environmental-reporti...]
Adapted by Ministry for the Environment and Statistics New Zealand to provide for environmental reporting transparency
Dataset used to develop the "El Niño Southern Oscillation" indicator [available at www.stats.govt.nz/indicators/el-nino-southern-osci...]
This indicator measures the El Niño Southern Oscillation (ENSO), the movement of warm equatorial water across the Pacific Ocean and the atmospheric response, using the Southern Oscillation Index (SOI). The SOI measures changes in atmospheric pressures across the Pacific.
We report the monthly average and 6-month rolling average SOI from 1876 to 2019, as well as the annual average SOI for this same period alongside New Zealand’s de-trended temperature from 1909 to 2019.
More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the attached data quality pdf.
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