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6 March 2014 1:04 pm ,
Vol. 343 ,
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
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ScienceShot: California Takes a Ride on the 'Pineapple Express'
21 December 2010 5:42 pm
How do you get 4 meters of snow in the Sierra Nevada of California over one weekend? Stand in the path of the “Pineapple Express.” This 7000-kilometer-long jet of moisture-laden air extending from near Hawaii can deliver 50 million liters of water per second to California. In recent days, this jet delivered 25 centimeters of rain to some areas, with the mountains getting their tropical moisture as meters of snow. The pump driving such flows is a North Pacific storm whose cold front arcs down into the tropics. A narrow river of moist, tropical air (diagonal band of cloud) rushes north and east just ahead of the front until it hits California, often for days on end. Flooding and mudslides often follow.
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