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"These calculations produce the global average temperature deviations from the baseline period of 1951 to 1980." "NASA’s full 2018 surface temperature data set — and the complete methodology used to make the temperature calculation — are available at: https://data.giss.nasa.gov/gistemp".
English: This is a key to a world map showing surface temperature trends between 1950 and 2014. Temperature trends range from -0.5 to +0.5 degrees celsius per decade, and are shown by color gradients: Cooling trend: dark to light blue; No trend: white; Warming trend: light to dark orange
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The Tibetan and Andean Plateaus present one of the largest differences in daily temperature on the planet, as does the Western US and the western portion of southern Africa. High desert regions typically have the greatest diurnal-temperature variations, while low-lying humid areas near the shores (tropical, oceanic, and arctic) typically have ...
The global average covers 97-98% of Earth's surface, excluding only latitudes above +85 degrees, below -85 degrees and, in the cases of TLT and TMT, some areas with land above 1500 m altitude. The hemispheric averages are over the northern and southern hemispheres 0 to +/-85 degrees. The gridded data provide an almost global temperature map. [3]
Data for the map were derived from the Goddard Earth Observing System (GEOS) model; they represent air temperatures at 2 meters (about 6.5 feet) above the ground on February 15, 2021. The darkest blue areas are where the model indicates temperatures reaching as low as -35°C (-31°F).
Temperature measurements are also made by GPS radio occultation. [31] This technique measures the refraction of the radio waves transmitted by GPS satellites as they propagate in the Earth's atmosphere, thus allowing vertical temperature and moisture profiles to be measured.
The Equal Earth compared to similar equal-area pseudocylindrical projections. The first known thematic map published using the Equal Earth projection is a map of the global mean temperature anomaly for July 2018, produced by the NASA’s Goddard Institute for Space Studies. [7]