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首页> 外文期刊>Atmospheric environment >Evaluation of the BSC-DREAM8b regional dust model using the 3D LIVAS-CALIPSO product
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Evaluation of the BSC-DREAM8b regional dust model using the 3D LIVAS-CALIPSO product

机译：使用3D LIVAS-CALIPSO产品评估BSC-DREAM8b区域灰尘模型

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The ability of regional atmospheric models to accurately represent long-range transport of dust is crucial for describing dust effects on radiation and clouds and for reducing their uncertainties on these processes. The optimized CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) pure-dust product that provides the three-dimensional patterns of dust and its transport pathways is a unique tool that can address the aforementioned models issues. In this study we use the CALIPSO dust extinction profiles as a tool for examining the performance of the regional dust model BSC-DREAM8b in space and time, for the period 2009-2013 over Northern Africa, the Mediterranean, Europe, Eastern North Atlantic and the Middle East. Our analysis suggests that the model overestimates the dust extinction coefficient above dust source regions in Sahara Desert especially at altitudes lower than 3 km at about 0.041cm(-1). We also found a slight underestimation of transported dust over Europe and Atlantic Ocean lower than 0.025 km(-1) of extinction coefficient values all along the vertical column. Over the Mediterranean dust is overestimated (similar to 0.01 km(-1) ) in layers higher than 1 km height. Dust in the Middle East is significantly underestimated by the model (similar to 0.05 km(-1)) all along the vertical column especially during warm seasons. The study also provides an analysis of the CALIPSO limitations and uncertainties on the detection of strong dust activity contributing to the differences between the simulations and observations above the dust sources of Bodele and Algeria.
机译：区域大气模型能够准确表示粉尘的远距离迁移能力，对于描述粉尘对辐射和云的影响以及减少其在这些过程中的不确定性至关重要。经过优化的CALIPSO（云气溶胶激光雷达和红外探路者卫星观测）纯尘产品可提供尘埃及其运输路径的三维模式，是解决上述模型问题的独特工具。在这项研究中，我们使用CALIPSO尘埃消灭剖面作为一种工具，研究了北非，地中海，欧洲，北大西洋东部和太平洋地区2009-2013年期间区域尘埃模型BSC-DREAM8b在空间和时间上的性能。中东。我们的分析表明，该模型高估了撒哈拉沙漠中尘埃源区域上方的沙尘消光系数，尤其是在海拔高度低于3 km的约0.041cm（-1）处。我们还发现，在整个垂直柱上，欧洲和大西洋沿线的消尘系数略低于0.025 km（-1）的消光系数值。在地中海上空，高于1 km的层中的灰尘被高估了（类似于0.01 km（-1））。该模型（特别是在暖季期间）沿垂直方向的柱子都大大低估了中东的灰尘（类似于0.05 km（-1））。这项研究还分析了CALIPSO在检测强粉尘活动方面的局限性和不确定性，这有助于模拟和观测在Bodele和阿尔及利亚粉尘源上方的观测结果之间的差异。

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