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Ammonia from agriculture influences cloud formation over Asia

The Asian tropopause aerosol layer (ATAL) is located at twelve to 18 kilometers height above the Middle East and Asia. This accumulation of aerosols in the Asian monsoon was discovered first in 2011. Its composition and effect, however, have been unknown so far. A European consortium of scientists has now found at this layer consists of crystalline ammonium nitrate. In the AIDA cloud chamber, climate researchers of Karlsruhe Institute of Technology (KIT) demonstrated how this substance is formed in the upper troposphere. The results are reported in Nature Geoscience.  Read more....

 

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