Température moyenne air | NASA Climate Spiral 1880-Present
https://svs.gsfc.nasa.gov/5190
Arya serious ? Buckle up !
Temperature anomalies are deviations from a long term global average. In this case the period 1951-1980 is used to define the baseline for the anomaly. These temperatures are based on the GISS Surface Temperature Analysis (GISTEMP v4), an estimate of global surface temperature change.
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