NUMERICAL SIMULATION OF ATMOSPHERIC POLLUTANTS DURING THE ONSET STAGE OF SOUTH CHINA SEA SUMMER MONSOON IN 2011

YANG Zhao-li; ZHENG Bin; WU Dui; HUANG Hui-jun

doi:10.16555/j.1006-8775.2015.S1.006

Abstract:

Using the 2006 Global Emissions Data and 2011 NCEP Final Analysis data as the initial and boundary condition, we simulated the three-dimensional distribution of atmospheric chemical pollutants (such as sea salt, PM10, COx, SO2, NOx, O3, etc) during the onset stage of South China Sea (SCS) summer monsoon from 25 April to 25 May in 2011 over the monsoon area of 70°–C160°E, 0°–C40°N. Simulation results shows that, many changes have taken place in the distribution of atmospheric chemical pollutants near 950 hPa and 400 hPa due to the enhancement of the westerlies and southerlies over the SCS as a result of the monsoon outbreak. Especially, the concentration of pollutants over the SCS is much higher than that over other places because of the strong wind convergence near the surface in situ. Moreover, the vertical distribution of pollutants is also greatly affected by the westerlies and southerlies in the onset process of SCS summer monsoon. Meanwhile, the concentration over land is much greater than that at sea in pre-monsoon period, while the difference between land and sea in the concentration of most pollutants decreases greatly with the onset of SCS summer monsoon.

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YANG Zhao-li, ZHENG Bin, WU Dui, et al. NUMERICAL SIMULATION OF ATMOSPHERIC POLLUTANTS DURING THE ONSET STAGE OF SOUTH CHINA SEA SUMMER MONSOON IN 2011 [J]. Journal of Tropical Meteorology, 2015, 21(S1): 57-65, https://doi.org/10.16555/j.1006-8775.2015.S1.006

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NUMERICAL SIMULATION OF ATMOSPHERIC POLLUTANTS DURING THE ONSET STAGE OF SOUTH CHINA SEA SUMMER MONSOON IN 2011

Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, CMA, Guangzhou 510080 China

Rev Recd Date: 2015-08-04

Abstract: Using the 2006 Global Emissions Data and 2011 NCEP Final Analysis data as the initial and boundary condition, we simulated the three-dimensional distribution of atmospheric chemical pollutants (such as sea salt, PM10, COx, SO2, NOx, O3, etc) during the onset stage of South China Sea (SCS) summer monsoon from 25 April to 25 May in 2011 over the monsoon area of 70°–C160°E, 0°–C40°N. Simulation results shows that, many changes have taken place in the distribution of atmospheric chemical pollutants near 950 hPa and 400 hPa due to the enhancement of the westerlies and southerlies over the SCS as a result of the monsoon outbreak. Especially, the concentration of pollutants over the SCS is much higher than that over other places because of the strong wind convergence near the surface in situ. Moreover, the vertical distribution of pollutants is also greatly affected by the westerlies and southerlies in the onset process of SCS summer monsoon. Meanwhile, the concentration over land is much greater than that at sea in pre-monsoon period, while the difference between land and sea in the concentration of most pollutants decreases greatly with the onset of SCS summer monsoon.

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NUMERICAL SIMULATION OF ATMOSPHERIC POLLUTANTS DURING THE ONSET STAGE OF SOUTH CHINA SEA SUMMER MONSOON IN 2011

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