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首页> 外文期刊>Atmospheric chemistry and physics >Emission, transport, and radiative effects of mineral dust from the Taklimakan and Gobi deserts: comparison of measurements and model results
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Emission, transport, and radiative effects of mineral dust from the Taklimakan and Gobi deserts: comparison of measurements and model results

机译：矿床和戈壁沙漠的矿物粉尘的排放，运输和辐射效应：测量和模型结果比较

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摘要

The Weather Research and Forecasting Model with chemistry (WRF-Chem model) was used to investigate a typical dust storm event that occurred from 18 to 23 March 2010 and swept across almost all of China, Japan, and Korea. The spatial and temporal variations in dust aerosols and the meteorological conditions over East Asia were well reproduced by the WRF-Chem model. The simulation results were used to further investigate the details of processes related to dust emission, long-range transport, and radiative effects of dust aerosols over the Taklimakan Desert (TD) and Gobi Desert (GD). The results indicated that weather conditions, topography, and surface types in dust source regions may influence dust emission, uplift height, and transport at the regional scale. The GD was located in the warm zone in advance of the cold front in this case. Rapidly warming surface temperatures and cold air advection at high levels caused strong instability in the atmosphere, which strengthened the downward momentum transported from the middle and low troposphere and caused strong surface winds. Moreover, the GD is located in a relatively flat, high-altitude region influenced by the confluence of the northern and southern westerly jets. Therefore, the GD dust particles were easily lofted to 4 km and were the primary contributor to the dust concentration over East Asia. In the dust budget analysis, the dust emission flux over the TD was 27.2±4.1 μgm~(-2) s~(-1), which was similar to that over the GD (29±3.6 μgm~(-2) s~(-1)). However, the transport contribution of the TD dust (up to 0.8 ton d~(-1)) to the dust sink was much smaller than that of the GD dust (up to 3.7 ton d~(-1)) because of the complex terrain and the prevailing wind in the TD. Notably, a small amount of the TD dust (PM_(2.5) dust concentration of approximately 8.7 μgm~(-3)) was lofted to above 5 km and transported over greater distances under the influence of the westerly jets. Moreover, the direct radiative forcing i
机译：使用化学（WRF-CHEM模型）的天气研究和预测模型用于调查2010年3月18日至23日的典型尘暴事件，并席卷了几乎所有中国，日本和韩国。 WRF-Chem模型的尘埃气溶胶和东亚气象条件的空间和时间变化很好地繁殖。模拟结果用于进一步调查与灰尘排放，远程运输以及灰尘气雾剂上的灰尘气雾剂（TD）和Gobi Desert（GD）的散热效果有关的过程的细节。结果表明，灰尘区的天气条件，地形和表面类型可能影响区域尺度的灰尘排放，隆起高度和运输。在这种情况下，GD位于冷前部的温暖区。高水平的快速变暖表面温度和冷空气平流导致大气中的强不稳定，这加强了从中低层传输的向下动量，并引起了强大的表面风。此外，GD位于受北部和南部西风喷射的汇合的相对平坦的高空区域。因此，GD粉尘颗粒容易倾斜至4公里，是东亚粉尘浓度的主要贡献者。在灰尘预算分析中，TD上的灰尘发射通量为27.2±4.1μgm〜（-2）S〜（-1），与GD相似（29±3.6μgm〜（-2）s〜 （-1））。然而，由于复杂的复合物地形和TD中的现行风。值得注意的是，少量的TD灰尘（PM_（2.5）粉尘浓度约为8.7μgm〜（-3））被倾斜至5km以上，并在西方喷射器的影响下在更大的距离上运输。而且，直接辐射强迫我

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  • 来源
    《Atmospheric chemistry and physics》 |2017年第2期|共21页
  • 作者

    Siyu Chen; Jianping Huang; Litai Kang; Hao Wang; Xiaojun Ma; Yongli He; Tiangang Yuan; Ben Yang; Zhongwei Huang; Guolong Zhang;

  • 作者单位

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    School of Atmospheric Sciences Nanjing University Nanjing China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Lanzhou University Lanzhou China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 大气科学（气象学）;
  • 关键词

    Emission; transport; radiative effects; model results;

    机译：排放;运输;辐射效果;模型结果;

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