Analytical Study of the Atmospheric Storm that Affected Western Algeria from September 6–8, 2024, Monitored Using Remote Sensing
DOI:
https://doi.org/10.37376/ajhas.vi4.7457Keywords:
Cyclonic system, atmospheric pressure, Beshar region, NDMI moisture index, Northwestern AfricaAbstract
This research aims to study an extreme weather phenomenon, specifically the storm that struck the Western Algeria region from September 5 to 8, 2024, which caused heavy rainfall and sudden floods. The underlying dynamics of this phenomenon were analyzed, and its geographic extent was determined. The storm’s dynamic characteristics were linked to significant flooding during the period of low-pressure dominance.
Key dynamic factors contributing to the storm include: (1) surface-level formation, (2) presence of a semi-monsoonal high-pressure system, (3) temporary upper-level formation at mid-latitudes, (4) an intense tropical jet stream, and (5) strong upward movement caused by tropospheric instability and synoptic-scale dynamic forces. A notable decrease in atmospheric pressure was recorded over Western Algeria, affecting the local climate.
Weather elements during the storm period were analyzed, and the distribution of atmospheric dynamics influencing the genesis and development of the low-pressure system was studied. The analysis relied on ERA-Interim reanalysis data, including surface and upper-level weather maps, as well as pressure data at 300 hPa and 500 hPa levels.
The study also examined the impact of the phenomenon using medium-resolution satellite images (Landsat 30m) before and after the storm, deriving indices such as NDMI for water and moisture, and NDBI for urbanization assessment. These indices were used to monitor changes post-disaster by comparing pre- and post-flood values
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