The planet experienced its , according to a new report released Thursday, which confirms that land temperatures, sea surface temperatures and greenhouse gas concentrations all reached historic levels last year.

The , published July 16 in the Bulletin of the American Meteorological Society, represents the work of more than 400 scientists from 58 countries around the world. "The variety of indicators shows us how our climate is changing, not just in temperature but from the depths of the oceans to the outer atmosphere,” said Thomas R. Karl, director of NOAA's National Centers for Environmental Information.

Together, the report's highlights paint a picture of a planet that continues to experience new records for land and ocean temperatures. Key highlights include:

Greenhouse gas levels reach new highs: "Major greenhouse gas concentrations, including carbon dioxide, methane and nitrous oxide, continued to rise during 2014, once again reaching historic high values," NOAA notes in a statement. "Atmospheric CO2 concentrations increased by 1.9 ppm in 2014, reaching a global average of 397.2 ppm for the year. This compares with a global average of 354.0 in 1990 when this report was first published just 25 years ago."Record temperatures near Earth’s surface: "Four independent global datasets showed that 2014 was the warmest year on record," NOAA's statement adds. "Europe experienced its warmest year on record, with more than 20 countries exceeding their previous records," including Mexico. Only Eastern North America, the report adds, was the single major world region "to experience below-average annual temperatures."More Arctic warming, with low sea ice extent: "The Arctic experienced its fourth warmest year since records began in the early 20th century," NOAA said. "Arctic snow melt occurred 20 to 30 days earlier than the 1998–2010 average ... The Arctic minimum sea ice extent reached 1.94 million square miles on September 17, the sixth-lowest since satellite observations began in 1979. The eight lowest minimum sea ice extents during this period have occurred in the last eight years."

Blended land and sea surface temperature percentiles from January to December 2014. (National Climatic Data Center)

Thursday's report follows an earlier study released by NOAA back in March, which also found that 2014 was the planet's warmest year in more than 130 years of recorded weather history.

In that report, the authors noted that contributing heavily to the Earth’s record warm year were record warm ocean temperatures. Despite the lack of an El Nino—a periodic warming of central and eastern equatorial Pacific water—2014’s global sea-surface temperatures surpassed 1998, which featured a strong El Nino early in the year.

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Over land areas, parts of western and northern Europe, central South America, eastern and western coastal Australia and western North America were particularly warm in 2014.

Seven months of 2014 either tied or set global warm records for that respective month. Only February (21st, tie) and November (7th, tie) failed to chalk up a top five warmest respective month in 2014.

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Thirteen of the 15 globally warmest years on record have now occurred since the year 2000. The other two years were 1997 and 1998, during which the strong El Nino mentioned above was in place.

December 2014 was the 358th straight month with global temperatures above the 20th-century average. The last month colder than average on a global scale was February 1985.

Despite this, parts of the central and eastern United States experienced . Indianapolis, Ft. Wayne, Indiana, and Dubuque, Iowa, each shivered through their record coldest year.

Conversely, at least 16 cities in the western U.S. had their record warmest year, including Phoenix, Las Vegas, San Francisco, Sacramento, San Diego, Seattle, and Nome, Alaska.

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The Ash Creek Fire seen here is one of some 27,000 fires which have destroyed nearly 2 million acres of the western U.S. since the start of 2012. Extremely dry conditions, stiff winds, unusually warm weather, and trees killed by outbreaks of pine bark beetles have provided ideal conditions for the blazes. (Credit: NASA)