Standardized Anomalies of Average Tropical Tropospheric Temperature and Niño 3.4 SST

This plot displays time series of the three-month running average of standardized tropical tropospheric temperature anomalies (in blue) and the three-month running average of standardized Niño 3.4 sea surface temperature anomalies (in red).

The standardized tropospheric temperature anomalies are averaged around the globe from 25°S to 25°N and from the 850 hPa pressure level to 200 hPa. The climatological base period for the atmospheric temperature is 1991 to 2020, and the base period used for the sea surface temperature anomalies is 1991-2020.

Dataset Documentation

Atmospheric Temperature Data

Data

NCEP-NCAR Reanalysis monthly air temperature from 850 hPa to 200 hPa on a 2.5° lat/lon grid

Data Source

NOAA National Centers for Environmental Prediction (NCEP) (NCEP/NCAR Reanalysis)

Analysis

Time series of the three-month running average of monthly standardized tropospheric temperature anomalies (1991-2020 base period) averaged around the globe from 25°S to 25°N from the 850 hPa pressure level to 200 hPa

Monthly SST Data

Data

NOAAs 1/4-degree Daily Optimum Interpolation Sea Surface Temperature (OISST) Version 2.1 monthly sea surface temperature anomaly (in °C) with respect to the 1991-2020 base period on a 0.25° lat/lon grid

Data Source

NOAA National Centers for Environmental Information (NCEI) (OISST Version 2.1 Data Library entry)

Analysis

Time series of the three-month running average of standardized monthly sea surface temperature anomalies (1991-2020 base period) averaged over the Nino 3.4 region (5°S to 5°N latitude, and 170°W to 120°W longitude)

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