A case study on the dust storm that occurred on March 13–18, 2022, over the Algerian Sahara, using satellite remote sensing

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-09-14 DOI:10.1016/j.jastp.2024.106345

Riad Guehaz , Venkataraman Sivakumar , Nkanyiso Mbatha

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Abstract

This study investigates the dynamics of a significant dust storm that occurred in Algeria in March 2022, employing data derived from the Sentinel-5P and CALIPSO satellite instruments. We examine the Aerosol Absorbing Index (AAI) to detect n absorbing aerosols, with a focus on desert dust, and analyze the attenuation coefficient. Additionally, we employ the HYSPLIT trajectory analyze to study dust transport and MERRA-2 to examine wind patterns wind. The key findings unveil a detailed trajectory of a prominent dust storm in Algeria in March 2022. The Aerosol Absorbing Index (AAI) effectively identifies absorbing aerosols, particularly desert dust, through thorough analyses of dust trajectory and wind patterns; augmenting these findings, CALIPSO satellite data has provided a detailed vertical profile of aerosols within the dust plume, emphasizing spatial and altitudinal extents. This research significantly contributes to advancing scientific discussions on atmospheric dynamics in arid regions and enhances our understanding and forecasting capabilities related to Saharan dust storm initiation and trajectory.

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利用卫星遥感技术对 2022 年 3 月 13-18 日发生在阿尔及利亚撒哈拉沙漠上空的沙尘暴进行案例研究

本研究利用 Sentinel-5P 和 CALIPSO 卫星仪器获得的数据，对 2022 年 3 月在阿尔及利亚发生的重大沙尘暴的动态进行了调查。我们研究了气溶胶吸收指数（AAI），以探测 n 种吸收气溶胶，重点是沙漠尘埃，并分析了衰减系数。此外，我们还利用 HYSPLIT 轨迹分析来研究沙尘的传输，并利用 MERRA-2 来研究风的模式。主要研究结果揭示了 2022 年 3 月阿尔及利亚一场突出沙尘暴的详细轨迹。气溶胶吸收指数（AAI）通过对沙尘轨迹和风型的全面分析，有效地识别了吸收性气溶胶，尤其是沙漠沙尘；CALIPSO卫星数据提供了沙尘羽流中气溶胶的详细垂直剖面图，强调了空间和高度范围，从而进一步丰富了这些发现。这项研究极大地促进了对干旱地区大气动力学的科学讨论，并增强了我们对撒哈拉沙尘暴的起因和轨迹的了解和预测能力。

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.