) Century of Surface Temperature Anomalies – Earthtopomaps
By Aodhan Sweeney
Click on the image below for more details:
A webgl globe to visualize how temperatures on Earth have changed over the past century.
COLLECTION:
A Century of Surface Temperature Anomalies
This experiment uses NASA GISTEMP v4 data and the webgl globe to visualize how temperatures on Earth have changed over the past century.
What is a temperature anomaly?. The term temperature anomaly means a departure from a reference value or long-term average. A positive anomaly indicates that the observed temperature was warmer than the reference value. While a negative anomaly indicates that the observed temperature was cooler than the reference value.
Tropical anomalies have their greatest effect in the Western Pacific. Where the average sea surface temperature is very high so that even a small positive anomaly can generate large increases in evaporation due to the exponential increase of saturation vapor pressure with temperature.
) Century of Surface Temperature Anomalies – Earthtopomaps
Since the 1880s, the average global surface temperature has risen and the average temperature is now more than 2 degrees Fahrenheit (a bit more than 1 degree Celsius) above that of the late 19th century. For reference, the last Ice Age was about 10 degrees Fahrenheit colder than pre-industrial temperatures. 15 janv. 2020
According to an ongoing temperature analysis led by scientists at NASA’s Goddard Institute for Space Studies (GISS), the average global temperature on Earth has increased by at least 1.1° Celsius (1.9° Fahrenheit) since 1880.
In climate change studies, temperature anomalies are more important than absolute temperature. A temperature anomaly is the difference from an average, or baseline, temperature. The baseline temperature is typically computed by averaging 30 or more years of temperature data.
For each component, the standardized anomaly is calculated as the difference between the current period and the reference period. And then scaled by the division of its reference period standard deviation.
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Revised September 18, 2023
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