A warming event in Siberia caused winds to strip sea ice from the Arctic’s Wandel Sea.
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Where Did All the Free-Flowing Rivers Go?
A map of the world’s free-flowing rivers shows a shrinking number can still meander as they please. New plans for hydropower will further constrain flow.
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Tree Rings Record 19th-Century Anthropogenic Climate Change
Paleoclimate records, observational data, and climate modeling capture the influence of human activity on temperature seasonality.
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Warm Water Is Rapidly Eroding Antarctica’s Ross Ice Shelf
The underside of the world’s largest ice shelf is melting—by meters per year in some places—because of the seasonal inflow of water heated by the Sun, observations of the White Continent reveal.
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Biodiversity Report Paints a Bleak Picture
Landmark study calls for urgent “transformative changes” to meet goals for conserving and sustainably using nature.
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Airborne Gravity Surveys Are Remaking Elevations in the U.S.
Measuring gravity’s tiny fluctuations is giving the United States an upgraded system of elevations.
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Marine Virus Survey Reveals Biodiversity Hot Spots
Ocean samples collected from around the world produced a twelvefold increase in the number of marine viruses known. A portion of the Arctic Ocean has “surprisingly high diversity.”
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Mysterious Coral Reef Halos Can Be Seen from Space
Grazing rings around reefs have the potential to be used as a tool for monitoring reef health, but first, scientists have to figure out what factors govern halo size differences.
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House OK’s Bill for U.S. to Stay in Paris Climate Accord
Democrats and environmental groups applaud the first major piece of climate legislation to pass the House in 10 years, but chances for passage in the Senate are slim.
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Global Warming Hits Marine Life Hardest
The lack of thermal refugia in the ocean means marine life has nowhere to escape from rising sea temperatures.