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Tree rings show water loss stunts growth
As the global climate warms, water limitations are negatively affecting the growth of forest trees worldwide, new research shows. The effect is most evident in northern climates and at high altitudes...
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Why the Greenland ice sheet is melting away
As global warming proceeds, the ice fields of southwest Greenland are becoming particularly sensitive to a climate cycle called the North Atlantic Oscillation. Summertime melting of the ice fields in...
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Wet winters no longer ease California’s wildfire risk
Wet winters no longer predict possible relief from severe wildfires for California, according to a new study. From 1600 to 1903, the position of the North Pacific jet stream over California linked to...
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Ancient pee indicates when we started keeping sheep and goats
Ancient pee suggests humans made a big leap in their domestication of animals starting about 10,450 years ago. At the beginning of that time period, people hunted game to obtain meat, says study...
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Why S. America got more grass-eaters 6M years ago
Armadillos as big as Volkswagens and other grass-eating mammals became more diverse in South America about 6 million years ago, report researchers. Why? Because shifts in atmospheric circulation drove...
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Is air pollution behind 80-year decline in monsoon rain?
Human-made air pollutants are likely the reason for a drop in precipitation from the Asian summer monsoon, according to new research. Rainfall from the Asian summer monsoon has been decreasing for the...
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Fracking isn’t the worst way to get at oil and gas
Conventional oil and gas production activities inject much more water underground than fracking and other petroleum-production methods, according to a new study. High-volume hydraulic fracturing, known...
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Wind and freshwater rob Southern Ocean of oxygen
Increased freshwater from melting Antarctic ice sheets plus increased wind have reduced the amount of oxygen in the Southern Ocean and made it warmer and more acidic, geoscientists report. Researchers...
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‘Perfect droughts’ hit California water sources 6 times a century
Severe droughts have happened simultaneously in the regions that supply water to Southern California almost six times per century on average since 1500, according to new research. The study is the...
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New Orleans is vulnerable to growing storm surges
The US East and Gulf Coasts will experience greater—but different—storm surges as global warming progresses, according to a new study. The two regions differ in how ocean and atmospheric circulation...
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