中国碳气溶胶时空分布与辐射强迫的数值模拟

为了更好地了解我国区域碳气溶胶,利用意大利国际理论物理中心ICTP(International Center forTheoretical Physics)的气溶胶资料和区域气候模式R egCM 3对2000年我国碳气溶胶时空分布与辐射强迫进行了数值模拟。结果表明:我国碳气溶胶主要分布在黄河以南、青藏高原以东的广大区域,且柱含量分布具有明显的季节性。春季最大,冬季次之,夏季最小;除东部沿海等少数地区外,碳气溶胶大气顶辐射强迫在全国绝大部分地区符号均为正,而地表辐射强迫符号为负。各单种气溶胶之间存在复杂的相互作用,研究综合气溶胶分布和气候效应时,不能简单地将各单种气溶胶的作用进行叠加。

Simulation on temporal and spatial distribution and direct radiative forcing of carbonaceous aerosols over China

T o enhance understanding on the carbonaceous aer oso ls over China, aerosol data from Inter natio nal Center fo r Theoret ical Physics ( ICTP) and reg io nal climate model RegCM3 were used to simulate the temporal and spatial distribution and radiat ive for cing of the car bonaceous aeroso ls in 2000. T he preliminary result s show that carbo naceous aerosols ar e mo st ly concent rated in the area of the south o f Yellow River and the east of T ibetan Plateau. Referring to the seasonal variation characterist ics, the simulation indicates that the maximum value o f column burden o f the carbonaceous aerosols appears in spr ing , the seco nd v alue in w inter and the minimum in summer . T he radiat ive forcing of the car bonaceous aer oso ls is po sit ive on the top of atmosphere ( T OA) besides eastern lit toral and neg ativ e on the g round. T he complex mutual act ion ex ist s in dif ferent kinds of aerosols, w hich indicates that ex periments on the distr ibution and climate ef fect s of aerosols sho uld not add the effect s of sing le aer osol s.