It was discovered from a separate analysis of NASA and the American Oceanic and Atmospheric Agency that 2018 was 'the fourth hotest year in history'

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Individual surveys of the National Oceanic and Atmospheric Administration (NOAA) and NASA showed that 2018 was the fourth hotest year of observation history. The top five in "the hottest year in history" is concentrated after 2014, and the trend of global warming continues in 2018.

2018 Fourth Warmest Year in Continued Warming Trend, According to NASA | NASA
https://www.nasa.gov/press-release/2018-fourth-warmest-year-in-continued-warming-trend-according-to-nasa-noaa

It's Official: 2018 Was the Fourth Warmest Year on Record - The New York Times
https://www.nytimes.com/interactive/2019/02/06/climate/fourth-hottest-year.html

2018 was Earth's fourth hottest year on record, NOAA and NASA report
https://www.cnbc.com/2019/02/06/2018-was-earths-fourth-hottest-year-on-record-noaa-and-nasa-report.html

According to the National Oceanic and Atmospheric Administration (NOAA) and NASA, the temperature of the ground and the sea in 2017 was about 0.83 degrees higher than the average of 30 years from 1951 to 1980. This is the fourth heat in the history that follows 2016, 2017 and 2015. Mr. Gavin Schmidt of NASA Goddard Institute of Space and Astronautical Science (GISS) said, "In 2018, it was based on the trend of global warming It has become a very hot year. "

Since 1880, the surface temperature of the Earth has risen by about 1 degree, and as a major reason for this, Schmidt pointed out that carbon dioxide and other greenhouse gases were released to the atmosphere by human activities. There is a difference in the place where the rise in temperature affects, and the temperature does not rise at all places on the earth, but NOAA shows that the average temperature was the highest in history in the 48 adjacent states in the history I report it.

Scientists reported that the temperature rising tendency is strong in the vicinity of the Arctic and Antarctic, scientists report that the ice of Greenland and Antarctica is melting at a violent momentum, thereby raising the sea level It is. In addition, due to the effects of global warming, the hot weather may be prolonged or abnormal weather often occurs, "The influence of long-term global warming, such as coastal floods, heat waves, intense rain, ecosystem changes, I think that it is done, "said Schmidt. According to NOAA, damages caused by the climate disaster that the US experienced in 2018 are over 1 billion dollars (about 110 billion yen).

The analysis of NASA and NOAA is the integration of the surface / sea surface temperatures measured by 6300 weather station, Antarctic observation station, ship or buoy. NASA analyzes data with algorithms that consider distortion factors such as distance between stations and heat island phenomena, but NOAA analyzes the same data in another way. This data set can be obtained from here .