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首页> 外文期刊>Journal of Applied Meteorology and Climatology >Study of the Impact of Summer Monsoon Circulation on Spatial Distribution of Aerosols in East Asia Based on Numerical Simulations
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Study of the Impact of Summer Monsoon Circulation on Spatial Distribution of Aerosols in East Asia Based on Numerical Simulations

机译:基于数值模拟的夏季季风环流对东亚气溶胶空间分布的影响研究

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摘要

The regional coupled climate-chemistry/aerosol model (RegCM3) is used to investigate the difference in the spatial distribution of aerosol optical depth (AOD) between a strong summer monsoon year (SSMY; July 2003) and a weak summer monsoon year (WSMY;July 2002) under the actual- and same-emission scenarios. It is shown that the intensity of the Asian summer monsoon is primarily responsible for the AOD spatial distribution anomaly in midsummer over East Asia. Specifically, the AOD over southern China, upwind of the Asian summer monsoon, is greater in WSMY than in SSMY, but the opposite is observed for the AOD downwind over northern China and the Korean Peninsula. The AOD spatial distribution patterns simulated on the basis of the actual emission inventories for the SSMY and WSMY do not substantially differ from their counterparts that are based on the same emission inventory, confirming that the monsoon circulation, rather than local emissions or dry and wet deposition processes, is the predominantfactor determining the regional AOD distribution. These modeling results are consistent with the analyses based on the Moderate Resolution Imaging Spectroradiometer (MODIS) products, NCAR-Department of Energy wind fields, and air parcel movements according to the 7-day trajectories of air parcels determined by the Hybrid Single-Particle Lagrangian Integrated Trajectory model.
机译:区域耦合的气候化学/气溶胶模型(RegCM3)用于研究强季风年(SSMY; 2003年7月)和弱季风年(WSMY; 2003年7月)之间气溶胶光学深度(AOD)的空间分布差异。 (2002年7月)。结果表明,亚洲夏季风的强度是造成东亚仲夏AOD空间分布异常的主要原因。具体而言,亚洲夏季风上风的华南地区的AOD在WSMY中大于SSMY,但在中国北部和朝鲜半岛的AOD顺风中则相反。根据SSMY和WSMY的实际排放清单模拟的AOD空间分布模式与基于相同排放清单的对应排放物没有实质性差异,这确认了季风环流,而不是局部排放或干湿沉降过程,是决定区域AOD分布的主要因素。这些建模结果与基于中等分辨率成像光谱仪(MODIS)产品,NCAR能源风场部门以及根据混合单粒子拉格朗日方法确定的7天航迹的航迹运动进行的分析一致。集成轨迹模型。

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