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Estimation of global scale aerosol distribution to evaluate its effect on global warming

估计全球尺度气溶胶分布以评估其对全球变暖的影响

基本信息

批准号：
14048211
负责人：
KITADA Toshihiro
金额：
$ 11.78万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

To evaluate relative contribution of both anthropogenic and natural emission sources to aerosol concentration, AGCTM (Aerosol Global scale Chemical Transport Model) has been developed. The model can trace source-receptor relations on various chemical species forming aerosol particles. Numerical simulations of transport/chemistry/deposition of aerosols and other chemical species were performed during 20 February to 31 March in 2001. Performance of the AGCTM has been evaluated by comparing the calculation results mainly with TSP (Total Suspended Particulates) concentration at various observation sites in China and with PM10 at Tokyo and Osaka in Japan.The model performance can be summarized as follows: first, the global model with current 2.5x2.5 degree resolution produced relatively good and acceptable aerosol concentrations at many locations in China such as Beijing, Shanghai, Lhasa, Xi'an, Hefei, Kunming, Xiamen, etc. except for those in northeastern China such as Shenyang, and Harubin. Second, agreement of calculation with observation is particularly good in Tokyo and Osaka, where more than 100 observation points were available to cover 2.5x2.5 degree grid cell, indicating importance to get appropriate data for comparison. Third, the model potentially provides detailed source-receptor relationship for various kinds of aerosol particles such as sulfate, nitrate, organic carbon, black carbon, soil dust, etc. originated from various source types such as fuel combustion, biomass burning, vegetation, volcano, soil, etc. For the model's improvement, further adjustment of parameters of soil dust emission model and appropriate inclusion of marine aerosols may be required.

为了评估人为和自然排放源对气溶胶浓度的相对贡献，建立了气溶胶全球尺度化学传输模式（AGCTM）。该模型可以跟踪源-受体的各种化学物种形成气溶胶粒子的关系。在2001年2月20日至3月31日期间，对气溶胶和其他化学物质的输送/化学/沉积进行了数值模拟。主要通过与TSP的计算结果进行比较，对AGCTM的性能进行了评价中国多个观测点的总悬浮粒子浓度，以及日本东京和大坂的PM10。模式的表现可归纳如下：首先，目前分辨率为2.5x2.5度的全球模式在中国的许多地点（如北京）产生了相对良好和可接受的气溶胶浓度，上海、拉萨、西安、合肥、昆明、厦门等地，沈阳、哈尔滨等东北地区除外。第二，东京和大坂的计算与观测的一致性特别好，在那里有100多个观测点可用于覆盖2.5x2.5度网格单元，这表明获得适当数据进行比较的重要性。第三，该模型潜在地为源自燃料燃烧、生物质燃烧、植被、火山、土壤等各种源类型的硫酸盐、硝酸盐、有机碳、黑碳、土壤尘等各类气溶胶粒子提供了详细的源-受体关系，对于模型的改进，可能需要进一步调整土壤粉尘排放模型的参数，并适当纳入海洋气溶胶。