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UC Davis Begins $2.8M Studies on Impacts of Escaped Nitrogen

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University of California, Davis researchers will receive $2.8 million in new grants to study the use and impacts of escaped nitrogen from agricultural production. Nitrogen-based fertilizers help California farmers produce more than 400 agricultural commodities—vegetables, fruits, meats and dairy products—worth $36 billion a year.

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Study first to quantify amount of US pollution resulting from Chinese manufacturing for exports

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Average annual percentage of black carbon pollution related to Chinese exports. Dust, ozone and carbon can accumulate in valleys and basins in California and other Western states. When you buy a product at Wal-Mart, it has to be manufactured somewhere. —Steve Davis, UC Irvine Earth system scientist and co-author.

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Field study finds soot particles absorb significantly less sunlight than predicted by models; climate models may be overestimating warming by BC

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Although viewed as a potential target in the global effort to reduce climate change, atmospheric black carbon particles absorb significantly less sunlight than scientists have predicted, according to a new study by an international team of researchers, published in the journal Science. Earlier post.). Earlier post.).

Climate 261
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Berkeley study identifies diesel as main source of vehicular secondary organic aerosols

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The new findings contradict previous research focused on the LA Basin which concluded that gasoline vehicles contributed more to the production of secondary organic aerosols (SOA) than exhaust from diesel vehicles. The team used a chemical mass balance model to examine the contributions from each source to reactive gas-phase organic carbon.

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