Different contributions of Arctic sea ice anomalies from different regions to North China summer ozone pollution

摘要

Surface ozone pollution is the main form of summer air pollution in North China and damages human and ecosystem health. Long-term meteorological observations show that late spring Arctic sea ice and ozone-related meteorological conditions are positively correlated; this result was further verified by numerical experiments. The Eurasia teleconnection pattern bridged the sea ice over Gakkel Ridge to the local meteorological conditions associated with O-3. The sea ice anomalies over the Canada Basin and the Beaufort Sea mainly influenced the O-3 pollution in North China via the summer west Pacific pattern. Furthermore, changes in the relationships were also included. The anticyclonic circulation over North China, that is, the joint centre of the Eurasia teleconnection and west Pacific patterns, could significantly lead to suitable weather conditions to accelerate the photochemical reactions to transfer the precursors to surface ozone. This finding helps to improve the understanding of the interannual variation in ozone pollution in North China.