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首页> 外文期刊>Atmospheric environment >Identification of dust transport pathways from Lake Eyre, Australia using Hysplit
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Identification of dust transport pathways from Lake Eyre, Australia using Hysplit

机译：使用Hysplit识别来自澳大利亚艾尔湖的粉尘输送路径

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The HYbrid Single-Particle Lagrangian Integrated Trajectory model (HYSPUT_4) is used to create seasonal climatologies (1980-2000) of air parcel trajectories from the Southern Hemisphere's most active dust source Lake Eyre, Australia. Daily trajectories were computed forward for eight days from an origin centered over Lake Eyre at 500 m above the ground surface. Trajectory density maps were then created within a CIS for five levels; 0-500 m agl., 500-1000 magl., 1000-1500 m agl., 1500-2000 m agl, and 2000-5000 m agl. These show that air parcel trajectories originating from Lake Eyre can affect regions many thousands of kilometers from the Australian continent in a relatively short period of time. Importantly, under favourable atmospheric conditions these air parcels have the potential to transport dust and other aerosols. During the austral winter, trajectories extended north to the southern Philippines highlighting the potential for dust from central Australia to affect most of Indonesia. This includes the tropical rainforests of Borneo and New Guinea, and the coral reefs of northern Australia and the Indonesian archipelago. We also show the potential for transport of dust from Lake Eyre to the Antarctic and much of the South Pacific and Southern Oceans. Accordingly, dust from Lake Eyre may affect biogeochemical cycles, sediment budgets, atmospheric processes and a wide range of ecosystems over a region much larger than previously thought. This highlights the need for further research to confirm the deposition of dust in the areas mapped by the present study.
机译：混合单粒子拉格朗日综合轨迹模型（HYSPUT_4）用于创建来自南半球最活跃的尘埃源澳大利亚艾尔湖的航空轨迹的季节性气候（1980-2000）。从位于地面以上500 m的艾尔湖上方的原点开始，向前计算了八天的每日轨迹。然后在CIS中创建了五个级别的弹道密度图； 0-500 m agl。，500-1000 magl。，1000-1500 m agl。，1500-2000 m agl和2000-5000 m agl。这些表明，源自艾尔湖的航空轨道可能会在相对较短的时间内影响距澳大利亚大陆数千公里的地区。重要的是，在有利的大气条件下，这些空气包具有运输灰尘和其他气溶胶的潜力。在南方冬季，轨迹向北延伸到菲律宾南部，突显了来自澳大利亚中部的尘埃影响印尼大部分地区的可能性。其中包括婆罗洲和新几内亚的热带雨林，以及澳大利亚北部和印度尼西亚群岛的珊瑚礁。我们还展示了将灰尘从艾尔湖运送到南极洲以及南太平洋和南大洋大部分地区的潜力。因此，来自艾尔湖的粉尘可能会影响比原先认为的更大的区域的生物地球化学循环，沉积物预算，大气过程和广泛的生态系统。这突出了需要进行进一步研究，以确认本研究绘制的区域中的粉尘沉积。

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