Aerosol Remote Sensing in Pakistan: Current Status, Challenges, and Future Directions

Aerosols play a critical role in Pakistan’s atmospheric environment by influencing air quality, public health, weather systems, and regional climate dynamics. Given the country’s diverse geography ranging from arid deserts and fertile plains to high-altitude mountainous regions. Pakistan experiences complex aerosol compositions arising from both natural sources (desert dust, sea salt, biogenic particles) and anthropogenic activities (industrial emissions, vehicular exhaust, biomass burning, and urban pollution). This review synthesizes the current state of aerosol remote sensing research in Pakistan, with a particular focus on satellite-based observations, ground-based networks, and integrated modeling approaches. We examine the application of major remote sensing platforms and products for retrieving aerosol optical depth, aerosol type, spatial–temporal variability, and long-term trends across key regions such as the Indo-Gangetic Plain, major urban centers, and transboundary dust corridors. The review highlights how aerosol remote sensing has advanced understanding of seasonal pollution episodes, dust transport mechanisms, monsoon–aerosol interactions, and aerosol radiative effects in Pakistan. Despite notable progress, significant challenges remain, including limited ground validation, data gaps in mountainous and rural areas, uncertainties in aerosol characterization, and insufficient integration with health and climate impact assessments. The paper concludes by outlining future research priorities, emphasizing the need for enhanced ground-based monitoring, high-resolution satellite data assimilation, and interdisciplinary frameworks to support evidence-based air quality management and climate policy in Pakistan.