Climate report: Hottest year, highest greenhouse gas marks, record sea levels

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Climate report: Hottest year, highest greenhouse gas marks, record sea levels

Scientists expected 2017 to be a bit cooler than 2016 because of the passing of last year's El Nino warming cycle, but so far it's been only slightly cooler, making the first half of the year the second-warmest January-June period on record.

While none of this will come as a surprise to anyone who follows either the news or climate science, all of these findings undercut the statements and actions made by President Donald Trump and the climate science deniers with whom he has surrounded himself. The results are based on thousands of scientific studies documenting incidents of climate change from around the world, and are at odds with what members of the Trump administration have often said about climate change.

The report said that through greenhouse-gas emissions and widespread deforestation, humans were conducting an "unprecedented experiment" with the climate system.

The report said that levels of carbon dioxide (CO2), methane and nitrous oxide - all the major greenhouse gases that drive global warming - had risen to new heights. For the first time in 800,000 years, the 400 ppm is left behind, according to NOAA's report.

Hurricane season could be the most active since 2010, according to research from the National Oceanic and Atmospheric Administration's (NOAA) Climate Prediction Center.

Global surface temperature was also the highest on record. Average sea levels around the world have risen by about seven to eight inches since the beginning of the 20th century, with about three of those inches occurring since 1993.

This represents a 6.3F (3.5C) increase since records began in 1900.

The report concludes it's "virtually certain" that human activity has contributed to the loss of sea ice and glaciers, declining snow cover, and rapidly increasing temperatures across the Arctic.

Keep this in the file when the Times reporters and columnists slip into high dudgeon about the White House displaying a lack of curiosity or a lack of respect for the importance of getting facts right. The hydrology of the Colorado River Basin, on which the West's big cities such as Phoenix, Los Angeles and Las Vegas depend, has already undergone "profound change", the report says.

Meanwhile, drought was unusually widespread.

However, this year is one in which it will probably not be present.

The data compiled in the report showed 2016 was overall a year of records.

It was the third consecutive year that the globe set a record high. Roger Pielke Jr., a scientist attacked by the climate tribe for daring to (correctly) challenge whether global warming is causing extreme weather events, offered up a tweetstorm response to the report.

Argentina, Paraguay, and Uruguay saw repeated heavy flooding, while parts of eastern Europe and central Asia were also wetter than usual. But the Dust Bowl of the 1930s remains the benchmark for heat and drought in American history, by virtue of the area involved and how long it lasted.

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