CAJ | 학술논문

使用一个耦合入化学过程的区域气候模式(RegCM3),在NCAR/NCEP再分析资料驱动下,通过多年时间尺度的连续积分,进行了亚洲区域气溶胶硫酸盐、黑碳和有机碳的时空分布及其直接气候效应的数值模拟.首先对模式的模拟能力进行了检验,结果表明,模式能够较好地模拟中国地区气温和降水的分布,对该区域气溶胶的时窄分布有一定的模拟能力.模式模拟得到的气溶胶浓度分布在冬季南北差异较大而夏季较小.气溶胶浓度与其形成的大气层顶和地面负短波辐射强迫有较好的对应关系.四川盆地是气溶胶浓度及其产生的辐射强迫的高值区.气溶胶对地面气温和降水都产生影响.其中所引起的冬季气温降低,与气溶胶的分布和浓度有一定的对应关系,但夏季引起的降温中心位于河套及黄河下游地区.气溶胶使得冬季和夏季中国东部大部分地区的降水减少.同时,对气温和降水上述变化的原因进行了讨论.
사용일개우합입화학과정적구역기후모식(RegCM3),재NCAR/NCEP재분석자료구동하,통과다년시간척도적련속적분,진행료아주구역기용효류산염、흑탄화유궤탄적시공분포급기직접기후효응적수치모의.수선대모식적모의능력진행료검험,결과표명,모식능구교호지모의중국지구기온화강수적분포,대해구역기용효적시착분포유일정적모의능력.모식모의득도적기용효농도분포재동계남북차이교대이하계교소.기용효농도여기형성적대기층정화지면부단파복사강박유교호적대응관계.사천분지시기용효농도급기산생적복사강박적고치구.기용효대지면기온화강수도산생영향.기중소인기적동계기온강저,여기용효적분포화농도유일정적대응관계,단하계인기적강온중심위우하투급황하하유지구.기용효사득동계화하계중국동부대부분지구적강수감소.동시,대기온화강수상술변화적원인진행료토론.
A regional climate model coupled with a chemistry-aerosol model(the ICTP RegCM3)is employed to simulate the anthropogenic aerosols including sulfate,black carbon and organic carbon and their direct effect on cli-mate over Asia and China.The model is driven by the NCAR/NCEP re-analysis data.Multi-year simulations are conducted.Results show that the model performs well in reproducing present climate over the region.Simulation of the spatial and temporal patterns of aerosols is also reasonable although to a less extent.A greater latitudinal distri-bution of the aerosol concentration is simulated in winter compared to that in summer.Negative short wave radiarive forcing is found at both the top of the atmosphere and the surface.The magnitude of the forcing is in good corre-spondence to the concentration of aerosols.The greatest concentration and largest radiative forcing are both found in the Sichuan Basin in Southwest China.Evident effects of the aerosols on both surface air temperature and precipita-tion are simulated over China.In winter,a drop in temperature impacted by aerosols is generally consistent with the aerosol concentration and distribution,whereas the largest decrease in temperature in summer is found in Hetao and the lower reaches of the Yellow River.The aerosol leads to a reduction of precipitation in eastern China both in win-ter and summer.The reasons for the temperature and precipitation changes are also presented in the paper.