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The blue line represents global surface temperature reconstructed over the last 2,000 years using proxy data from tree rings, corals, and ice cores. [1] The red line shows direct surface temperature measurements since 1880. [2] Global surface temperature (GST) is the average temperature of Earth's surface.
According to the website, each monthly issue "contains monthly mean temperature, pressure, precipitation, vapor pressure, and sunshine for approximately 2,000 surface data collection stations worldwide and monthly mean upper air temperatures, dew point depressions, and wind velocities for approximately 500 observing sites.
The current multi-century period is the warmest in the past 100,000 years. [3] The temperature in the years 2011-2020 was 1.09 °C higher than in 1859–1890. The temperature on land rose by 1.59 °C while over the ocean it rose by 0.88 °C. [3] In 2020 the temperature was 1.2 °C above the pre-industrial era. [4]
The initial version of Global Historical Climatology Network was developed in the summer of 1992. [3] This first version, known as Version 1 was a collaboration between research stations and data sets alike to the World Weather Records program and the World Monthly Surface Station Climatology from the National Center for Atmospheric Research. [4]
The average global temperature for the 12-month period to the end of May was 1.63 degrees Celsius (2.9 degrees Fahrenheit) above the pre-industrial average - making it the warmest such period ...
From 1978 onward CRU began production of its gridded data set of land air temperature anomalies based on instrumental temperature records held by National Meteorological Organisations around the world. In 1986 sea temperatures were added to form a synthesis of data which was the first global temperature record, demonstrating unequivocally that ...
The global temperature was about 1.5 degrees Fahrenheit over the 1991-2020 average for the month of February, and about 0.2 degrees warmer than the previous February record.
— In the NOAA wab page, choose 12-Month timescale, December, 1880-2019, Global, Land and Ocean, Plot. — Data uses 1901-2000 base period (=0°C in the chart). Actual data for this chart is provided in expandable text, below. FYI: Data, adjusted for a different base period, is used in the top half of uploader RCraig09's other image file: File ...