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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
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...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
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ScienceShot: Can Haze Turn the Climate Tide?
4 April 2012 1:17 pm
Decades-long swings in the temperature of the North Atlantic Ocean are known to influence everything from surges in hurricane activity to drought in the African Sahel. Scientists have attributed those temperature swings to natural oscillations in the strength of the ocean currents that bring warmth from the south. But a group of climate scientists argues today in Nature that the waxing and waning of atmospheric hazes—tiny particles belched by everything from smokestacks to volcanoes—over the North Atlantic drove ocean temperature changes there. Hazes (seen over the U.S. mid-Atlantic, above) work by varying the amount of sunlight they block from the ocean surface. Older climate models can't duplicate the effect, the group says, but a new-generation model can. If hazes do in fact drive most North Atlantic temperature swings, long-range climate forecasters would have to get into the far hazier business of predicting volcanic eruptions and pollution trends.
See more ScienceShots.