CAJ | 학술논문

利用2012年4-6月南京溧水野外观测站近地层微气象、地表辐射和通量交换数据，结合南京大学地球系统区域过程综合观测研究站(SORPES-NJU)的PM2.5质量浓度以及环境保护部发布的逐日 API 资料，使用聚类分析、合成分析和个例分析的方法，定量分析了南京地区不同大气污染程度下气象要素和地表能量平衡的响应特征.结果表明，观测期间南京地区污染天盛行偏南风，且风速较清洁天气低约30%.气溶胶白天对到达地面的太阳辐射的削弱作用大于对地面有效辐射的减弱作用，使得地面净辐射减小(日均值约46.3 W·m-2).气溶胶减弱感热通量、潜热通量，并影响二者在能量平衡中的比重.个例分析表明气溶胶通过减小白天地面净辐射，减弱地气系统能量，导致近地层气温降低(最大差值约1℃)，湍流运动减弱，从而进一步抑制污染物的扩散，形成空气污染地表能量收支边界层结构间的正反馈过程.
이용2012년4-6월남경률수야외관측참근지층미기상、지표복사화통량교환수거，결합남경대학지구계통구역과정종합관측연구참(SORPES-NJU)적PM2.5질량농도이급배경보호부발포적축일 API 자료，사용취류분석、합성분석화개례분석적방법，정량분석료남경지구불동대기오염정도하기상요소화지표능량평형적향응특정.결과표명，관측기간남경지구오염천성행편남풍，차풍속교청길천기저약30%.기용효백천대도체지면적태양복사적삭약작용대우대지면유효복사적감약작용，사득지면정복사감소(일균치약46.3 W·m-2).기용효감약감열통량、잠열통량，병영향이자재능량평형중적비중.개례분석표명기용효통과감소백천지면정복사，감약지기계통능량，도치근지층기온강저(최대차치약1℃)，단류운동감약，종이진일보억제오염물적확산，형성공기오염지표능량수지변계층결구간적정반궤과정.
Aerosols contribute substantially to radiative forcing,which inevitably influences the land surface process and then exerts a perturbation on climate.The interaction of meteorological characteristics,energy budget and aerosols over Yangtze River Delta has been investigated,by analyzing the concentration of fine particles collected from the Xianlin ‘flagship’central site of the Stations for Observing Regional Processes of the Earth System (SORPES)and meteorological parameters,radiation fluxes obtained from the Lishui subsidiary site of SORPES from April to June 2012.The results indicate that air pollution in this area is associated with southerly wind characterized by low speed.Heavy load of aerosols resulted in a decrease in the solar radiation by 64.8 W·m-2 and a decrease in the net radiation by 46.3 W·m-2 in the daytime.Weakened latent fluxes and sensible fluxes are observed combined with a changed Bowen ratio.It is speculated that aerosols reduce the net radiation and cause a decrease in air temperature near surface,which depresses the land surface turbulent fluxes and leads to an increase in aerosol con-centration in turn.