CAJ | 학술논문

利用耦合气溶胶化学过程的高分辨率区域气候模式 RegCM4,模拟研究了2000~2009年亚洲地区沙尘和3种人为气溶胶(硫酸盐、黑碳、有机碳)的时空分布和直接气候效应。结果表明,模拟的气溶胶光学厚度在沙尘源区附近较为准确,但在人为活动影响较大的地区偏小。4种气溶胶的综合作用引起大气层顶负的辐射强迫,从而造成了地表气温的下降。降水方面,冬夏2季气溶胶对模拟区域的影响都以降水减少为主,这与气溶胶增加大气稳定度,减少地表蒸发并产生了偏北风距平有关。沙尘和人为气溶胶各自都能引起气温的下降和降水的减少,2类气溶胶都能造成的偏北风距平对我国南方降水的减少有重要作用。在人类活动密集区,人为气溶胶引起的气候效应约占总的4种气溶胶气候效应的50%。
이용우합기용효화학과정적고분변솔구역기후모식 RegCM4,모의연구료2000~2009년아주지구사진화3충인위기용효(류산염、흑탄、유궤탄)적시공분포화직접기후효응。결과표명,모의적기용효광학후도재사진원구부근교위준학,단재인위활동영향교대적지구편소。4충기용효적종합작용인기대기층정부적복사강박,종이조성료지표기온적하강。강수방면,동하2계기용효대모의구역적영향도이강수감소위주,저여기용효증가대기은정도,감소지표증발병산생료편북풍거평유관。사진화인위기용효각자도능인기기온적하강화강수적감소,2류기용효도능조성적편북풍거평대아국남방강수적감소유중요작용。재인류활동밀집구,인위기용효인기적기후효응약점총적4충기용효기후효응적50%。
A high-resolution regional climate model RegCM4 coupled with a simple chemistry/aerosol mod-ule was used to simulate the spatial-temporal distributions and direct climate effects of dust and three kinds of anthropogenic aerosols (sulfate,black carbon and organic carbon)over Asia from 2000 to 2009.The re-sults show that the simulated aerosol optical depth is much accurate over the regions of dust source,but is underestimated over regions of high-frequency human activity.Composite effects of the four kinds of aero-sols can lead to the decrease of the surface temperature because of negative radiative forcing at the top of atmosphere.The aerosols lead to the reduction of precipitation over Asia in winter and summer,which is related with the increase of the atmospheric stability,the reduction of evaporation and northerly wind a-nomaly caused by the multiple aerosols.Dust and anthropogenic aerosols can individually cause decrease of tem-perature and reduction of precipitation.The northerly wind anomaly caused by two types of aerosols has an impor-tant role in reduction of precipitation in South China.In the regions of high-frequency human activity,magnitude of climate effects caused by anthropogenic aerosols accounts for 50% of climate effects caused by total aerosols.