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首页> 外文期刊>Atmospheric environment >Direct radiative forcing due to anthropogenic aerosols in East Asia during April 2001
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Direct radiative forcing due to anthropogenic aerosols in East Asia during April 2001

机译：2001年4月东亚人为气溶胶引起的直接辐射强迫

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An aerosol dynamic model including such processes of nucleation, condensation/evaporation, coagulation, sedimentation, hygroscopic growth and dry and wet deposition coupled with the gas-phase chemistry of the California Institute of Technology model and the aqueous-phase chemistry of the Regional Acid Deposition Model together with meteorological outputs of the MM5 model in a grid of 60 x 60 km~2 has been used to estimate anthropogenic aerosols in East Asia (95-145E, 20-50N) for the period of 2-30 April 2001 in the ACE-Asia experimental period. During this period an Asian dust event has been observed from 10 to 13 and 24-26 April in the Korean peninsula. The estimated anthropogenic aerosols excluding the Asian dust are implemented to estimate radiative forcing at the surface, at the top of atmosphere (TOA) and atmospheric aerosol absorption in East Asia using the National Center for Atmospheric Research column radiation model of the community climate model. The results indicate that the area averaged column integrated anthropogenic aerosol concentration in East Asia is estimated to be about 20 mg m~(-2), of which 46%, 29%, 20%, 4% and 1% are contributed by mixed type, inorganic (IOC), sea salt, organic carbon and black carbon aerosol, respectively. The daytime area mean direct shortwave radiative forcing at the surface is found to be about -5.9 Wm~(-2), of which IOC and the mixed type aerosol contribute about 95% whereas that at TOA is about -4.1 Wm~(-2), of which the IOC and the mixed type aerosol contribute more than 90%. Consequently the area mean atmospheric absorption due to anthropogenic aerosol layer in East Asia is about 1.8 W m~(-2). The result clearly confirms the existence of a cooling effect (negative forcing) due to the direct effect of anthropogenic aerosols at the surface and TOA in East Asia. However, the atmosphere of the troposphere above the ground is slightly heated due to absorbing aerosol layers that are composed of black carbon and the mixed type aerosol.
机译：气溶胶动力学模型，包括成核，冷凝/蒸发，凝结，沉淀，吸湿性生长以及干湿沉降过程，再加上加利福尼亚理工学院模型的气相化学和区域酸沉积的水相化学该模型连同MM5模型的气象输出在60 x 60 km〜2的网格中已用于估算ACE在2001年4月2日至30日期间东亚（95-145E，20-50N）的人为气溶胶-亚洲实验期。在此期间，从4月10日至13日和24日至26日在朝鲜半岛发生了一次亚洲尘埃事件。使用社区气候模型的国家大气研究中心列辐射模型，对除亚洲粉尘以外的人为气溶胶进行了估算，以估算表面，大气顶部（TOA）的辐射强迫和东亚的大气气溶胶吸收。结果表明，东亚地区人为气柱综合气溶胶的平均面积浓度约为20 mg m〜（-2），其中混合型占46％，29％，20％，4％和1％。 ，无机（IOC），海盐，有机碳和黑碳气雾剂。白天在地面的直接短波辐射强迫平均值约为-5.9 Wm〜（-2），其中IOC和混合型气溶胶的贡献约为95％，而TOA约为-4.1 Wm〜（-2） ），其中IOC和混合型气溶胶的贡献率超过90％。因此，东亚地区由于人为气溶胶层引起的平均大气吸收面积约为1.8 W m〜（-2）。该结果清楚地证实了降温作用（负强迫）的存在是由于东亚地表的人为气溶胶和TOA的直接作用。但是，由于吸收了由黑碳和混合型气溶胶组成的气溶胶层，对流层上方的对流层大气被稍微加热。

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