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| 亚洲地区沙尘和人为气溶胶的分布及直接气候效应 | |
| 引用本文： | 沈新勇' target='_blank'>,黄文彦' target='_blank'>,黄伟' target='_blank'>,陈明诚.亚洲地区沙尘和人为气溶胶的分布及直接气候效应[J].解放军理工大学学报,2013,0(5). |
| 作者姓名： | 沈新勇' target='_blank'> 黄文彦' target='_blank'> 黄伟' target='_blank'> 陈明诚 |
| 作者单位： | 1. 南京信息工程大学 气象灾害教育部重点实验室，江苏 南京 210044； 2. 南京信息工程大学 气象灾害预报预警与评估协同创新中心，江苏 南京 210044； 3. 中国气象科学研究院 灾害天气国家重点实验室，北京 100081 |
| 基金项目： | 国家973计划资助项目（2011CB403405，2013CB430103）；国家自然科学基金资助项目（41075039，41175065，41375058）；江苏省高校优势学科建设工程资助项目（PAPD）；江苏省优秀科技创新团队项目 |
| 摘 要： | 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，冬夏两季气溶胶对模拟区域的影响都以降水减少为主，这与气溶胶增加了大气稳定度，减少了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，两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%。 |
| 关 键 词： | 区域气候模式 人为气溶胶 沙尘 气溶胶光学厚度 气候效应 |
| 收稿时间： | 2013-03-24 |
| 修稿时间： | 2013-03-24 |
Distributions and direct climate effects of dust and anthropogenic aerosols over Asia |
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| SHEN Xinyong' target='_blank'>,HUANG Wenyan' target='_blank'>,HUANG Wei' target='_blank'>,CHEN Mingcheng.Distributions and direct climate effects of dust and anthropogenic aerosols over Asia[J].Journal of PLA University of Science and Technology(Natural Science Edition),2013,0(5). | |
| Authors: | SHEN Xinyong' target='_blank'> HUANG Wenyan' target='_blank'> HUANG Wei' target='_blank'> CHEN Mingcheng |
| Affiliation: | 1. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China； 3. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences,Beijing 100081, China |
| Abstract: | A high resolution regional climate model RegCM4 coupled with a simple chemistry/aerosol module is 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 results show that the simulated aerosol optical depth is much accurate over the regions of dust source, but is underestimated over human activity high frequency regions. Composite effects of the four kinds of aerosols can lead the surface temperature decrease, 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 anomaly caused by the multiple aerosols. Dust and anthropogenic aerosols can individually cause decrease of temperature and reduction of precipitation. The northerly wind anomaly caused by two types of aerosols has an important role in reduction of precipitation in the southern China. In the human activity high frequency regions, magnitude of climate effects caused by anthropogenic aerosols accounts for 50% climate effects caused by total aerosols. |
| Keywords: | RegCM4 anthropogenic aerosols dust aerosol optical depth climate effect |
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