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As Walter Meier of NASA’s Goddard Space Flight Center has put it, “The climate system’s interconnected.So what happens in the Arctic doesn’t stay in the Arctic.” That’s true for a number of reasons, including this: Research suggests that Arctic warming is affecting day-to-day weather much farther south — not always pleasantly.The 85 scientists who published the peer-reviewed Arctic Report Card synthesized research from multiple sources.The section devoted to comparing today’s observed climate shifts to changes that occurred in the past is based in part on paleoclimate research using what scientists call “proxy records.” These include tree-ring records, and chemical fingerprints locked within cores drilled from ice sheets, lake sediments, and the seafloor.Yulsman has written one book: Origins: the Quest for Our Cosmic Roots, published by the Institute of Physics in 2003.On November 16, 1532, Francisco Pizarro, the Spanish explorer and conquistador, springs a trap on the Incan emperor, Atahualpa.On this day in 1863, Confederates under General James Longstreet fail to defeat a Union force under General Ambrose Burnside at the Battle of Campbell Station near Knoxville, Tennessee.
The graph above reveals what these proxy records along with modern monitoring reveal about the history of Arctic climate change over the past 1,500 years.From this year’s Arctic Report Card, an assessment published every year by the U. National Oceanic and Atmospheric Administration: Despite relatively cool summer temperatures, observations in 2017 continue to indicate that the Arctic environmental system has reached a ‘new normal’, characterized by long-term losses in the extent and thickness of the sea ice cover, the extent and duration of the winter snow cover and the mass of ice in the Greenland Ice Sheet and Arctic glaciers, and warming sea surface and permafrost temperatures.“The Arctic is going through the most unprecedented transition in human history, and we need better observations to understand and predict how these changes will affect everyone, not just the people of the north,” said Jeremy Mathis, director of NOAA’s Arctic Research Program.Speaking at the American Geophysical Union meeting in New Orleans yesterday, he was quoted by Chris Mooney in the Washington Post.In other words, changes occurring in the Arctic aren’t of concern just to people living in the high north.
(Source: NASA GISTEMP)Ima Geo is a visual blog focusing on the intersection of imagery, imagination and Earth.