Articles | Volume 20, issue 20
Atmos. Chem. Phys., 20, 12211–12221, 2020
https://doi.org/10.5194/acp-20-12211-2020
Atmos. Chem. Phys., 20, 12211–12221, 2020
https://doi.org/10.5194/acp-20-12211-2020

Research article 28 Oct 2020

Research article | 28 Oct 2020

Roles of climate variability on the rapid increases of early winter haze pollution in North China after 2010

Yijia Zhang et al.

Data sets

CPC Soil Moisture data sets CPC http://www.esrl.noaa.gov/psd/data/gridded/data.cpcsoil.html

Emissions for 2010 MIX http://geoschemdata.computecanada.ca/ExtData/HEMCO/MIX

Meteorological data NCEP/NCAR http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html

NOAA Extended Reconstructed Sea Surface Temperature (SST) V4 data sets NOAA http://www.esrl.noaa.gov/psd/data/gridded/data.noaa.ersst.v4.html

Snow cover data Rutgers University http://climate.rutgers.edu/snowcover/

PM<sub>2.5</sub> observations US embassy http://www.stateair.net/web/post/1/1.html

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Short summary
Haze events in early winter in North China exhibited rapid growth after 2010, which was completely different from the slow decline observed before 2010. However, global warming and anthropogenic emissions could not explain this trend reversal well, which was puzzling. Our study found that four climate factors, exhibiting completely opposite trends before and after 2010, effectively drove the trend reversal of the haze pollution in North China.
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