Direct Climatic Effect of Aerosols and Interdecadal Variations over East Asia Investigated by a Regional Coupled Climate-Chemistry/Aerosol Model
Direct Climatic Effect of Aerosols and Interdecadal Variations over East Asia Investigated by a Regional Coupled Climate-Chemistry/Aerosol Model
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DOI：
10.1080/16742834.2011.11446947
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发表时间：
2011-01
影响因子：
2.3
通讯作者：
Han Zhi-wei;Xiong Zhe;Li Jia-wei
中科院分区：
文献类型：
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作者：
Han Zhi-wei;Xiong Zhe;Li Jia-wei
利用一个区域尺度的气候-化学/气溶胶耦合模式对1980-2000年东亚地区气溶胶的直接气候效应进行了数值研究，该模式包括主要的人为气溶胶(硫酸盐、黑碳和有机碳)和天然气溶胶(土壤沙尘和海盐)。模型模拟中使用的人为排放来自为政府间气候变化专门委员会第五次评估报告(气专委第五次评估报告)编制的全球排放清单，而自然气溶胶则在模型中在线计算。模拟的20年平均直接太阳辐射效应在中国大部分地区为−9-−33Wm-2，其中中国西部戈壁沙漠为最大，四川盆地、黄河中下游和长江流域为−12Wm-2到−24Wm-2。气溶胶在东亚大部分地区引起地表降温，最大值在中国西部沙漠、四川盆地、中国中部部分地区和长江中游地区的−0.8C到−1.6C之间。气溶胶引起的降水减少几乎覆盖了整个中国东部地区，四川盆地、长江中游和黄河下游的最大降水量为−90 mm/年，−为150 mm/年。气候对气溶胶直接辐射效应的响应具有明显的年代际变化，表明90年代比80年代地面气温下降幅度更大，对降水的扰动更强，这可能是由于人为排放的年代际变化所致。
Abstract The direct climatic effect of aerosols for the 1980–2000 period over East Asia was numerically investigated by a regional scale coupled climate-chemistry/aerosol model, which includes major anthropogenic aerosols (sulfate, black carbon, and organic carbon) and natural aerosols (soil dust and sea salt). Anthropogenic emissions used in model simulation are from a global emission inventory prepared for the Intergovernmental Panel on Climate Change Fifth Assessment Report (IPCC AR5), whereas natural aerosols are calculated online in the model. The simulated 20-year average direct solar radiative effect due to aerosols at the surface was estimated to be in a range of −9– −33 W m-2 over most areas of China, with maxima over the Gobi desert of West China, and −12 W m-2 to −24 W m-2 over the Sichuan Basin, the middle and lower reaches of the Yellow River and the Yangtze River. Aerosols caused surface cooling in most areas of East Asia, with maxima of −0.8°C to −1.6°C over the deserts of West China, the Sichuan Basin, portions of central China, and the middle reaches of the Yangtze River. Aerosols induced a precipitation decrease over almost the entire East China, with maxima of −90 mm/year to −150 mm/year over the Sichuan Basin, the middle reaches of the Yangtze River and the lower reaches of the Yellow River. Interdecadal variation of the climate response to the aerosol direct radiative effect is evident, indicating larger decrease in surface air temperature and stronger perturbation to precipitation in the 1990s than that in the 1980s, which could be due to the interdecadal variation of anthropogenic emissions.