2018 Was Fourth Hottest Year On Record — NOAA/NASA


Global temperatures in 2018 were 1.5 degrees Fahrenheit (0.83 degrees Celsius) warmer than the 1951 to 1980 mean, according to scientists at NASA's Goddard Institute for Space Studies (GISS) in NY.

Nine eastern states had their wettest years on record, "an exclamation point on a trend of big rain" in the age of climate change, Arndt said. "We are seeing more and more warming that is happening at a faster and faster rate". "The warming in the past four years has been exceptional, both on Land and in the ocean". Mass loss from the Greenland and Antarctic ice sheets combined to add to sea level rise. "It's because of the increases of greenhouse gases".

"There is a lot of variability in a system, but when you get a five-year average saying the same thing, you are beyond the variability component, and you can feel much more confident that what you're looking at is a signal", Abdalati said.

NASA's temperature analyses came from 6,300 weather stations, ship and buoy-based observations of sea surface temperatures, and temperature measurements from Antarctic research stations. "The last five years have been the record warmest years that we've seen in a record that goes back to the 19th century and possibly even hundreds of years before that". An Expensive Year Of Disasters On Wednesday, NOAA also issued their own analysis of the economic impact of global warming. The warming trends are most evident in the Arctic, NASA said.

Continuing, Taalas said: "Temperatures are only part of the story". In the past 5 years, the annual average rose to 12.6. The top three costliest natural disasters globally were all in the U.S., making it their fourth-costliest year ever, at $160 billion.

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Scientists say such remarks confuse short-term natural variations - that is, weather - with long-term shifts in the climate that are driven by human activity.

But again, Abdalati cautioned against the mentality of placing a single year under the microscope to the exclusion of broader trends. It was also nominally the warmest year for Europe (and particularly the hottest in France, Germany and Switzerland) since continental records began in 1910. "That's a clear upward signal".

NOAA notes that weather dynamics affect regional temperatures, so not every region experienced the same amount of warming. The higher average temperature and record concentrations of Carbon dioxide in the earth's atmosphere have massive consequences. It's easy, if someone is skeptical to look at a hot year and say it's meaningless, we've been here before. Meanwhile, only 2.4 percent of the surface was significantly colder than that baseline period.

Yet Trump has dismissed the threat of climate change, including a landmark assessment by 13 federal agencies last fall that found climate change is inflicting increasing damage to the nation's environment, health and economy.

The years 2015 and 2017 were 1.1 degrees above the Mediterranean.