Articles | Volume 15, issue 20
https://doi.org/10.5194/acp-15-11919-2015
https://doi.org/10.5194/acp-15-11919-2015
Research article
 | 
27 Oct 2015
Research article |  | 27 Oct 2015

A new indicator on the impact of large-scale circulation on wintertime particulate matter pollution over China

B. Jia, Y. Wang, Y. Yao, and Y. Xie

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Short summary
We developed a new indicator, Siberian High position index (SHPI), which depicts the mean longitudinal position of the SH, as a new indicator of the large-scale circulation pattern that controls wintertime air quality in China. This SHPI explains 58% and 64% of the interannual variability of winter AOD during 2001-2013 over North China and South China, respectively. The extreme PM pollution of January 2013 is found to be associated with extremely high values of SHPI.
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