Scholarlink

<p>The investigation of atmospheric complex pollutant relationships in the Sahara Desert, the largest desert located in northern Africa, constitutes a critical component of global environmental research. This study analyzed the intricate interactions among NO<sub>2</sub>, HCHO, and O<sub>3</sub> in the Sahara Desert region (encompassing Algeria, Libya, and Egypt) using temporal and spatial distributions derived from OMI sensor data, the HYSPLIT model, and ozone-sensitive control areas. The analysis revealed their spatial and temporal distributions, trans-regional transport pathways, and the dominance of ozone as a pollutant. Results indicated that the annual changes in the spatial distribution of NO<sub>2</sub>, HCHO, and O<sub>3</sub> exhibited an increasing trend from south to north. Temporally, NO<sub>2</sub> showed a wavy pattern with a peak in 2017, HCHO displayed an inverted V pattern peaking in 2018, and O<sub>3</sub> followed a Z pattern with a peak in 2017. Monthly variations showed that both NO<sub>2</sub> and O<sub>3</sub> were highest in summer, followed by spring, autumn, and winter, while HCHO peaked in winter, followed by autumn, summer, and spring. Exogenous atmospheric transport significantly influences NO<sub>2</sub> pollution in the Sahara Desert, as demonstrated by the HYSPLIT model’s analysis of backward trajectories and potential source areas over a decade of rainy and dry seasons. High-pollution areas are primarily affected by the southeastern Mediterranean monsoon and the southeastern Algiers winds. Annual spatial variations within ozone-sensitive control areas indicate that ozone is predominantly influenced by VOCs and NOx synergistic control. Monthly spatial variations show that NOx control dominates in autumn and winter, while VOCs control prevails in summer and fall.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

An investigation into NO2 column concentrations in the Sahara Desert region: relationships with other pollutants

  • 期刊论文

  • 发表日期：

    2025年2月28日

查看全文
  • Zhenrong Gu,
  • Tianzhen Ju,
  • Bingnan Li,
  • Lanzhi Wang,
  • Zhichao Lv

摘要

The investigation of atmospheric complex pollutant relationships in the Sahara Desert, the largest desert located in northern Africa, constitutes a critical component of global environmental research. This study analyzed the intricate interactions among NO2, HCHO, and O3 in the Sahara Desert region (encompassing Algeria, Libya, and Egypt) using temporal and spatial distributions derived from OMI sensor data, the HYSPLIT model, and ozone-sensitive control areas. The analysis revealed their spatial and temporal distributions, trans-regional transport pathways, and the dominance of ozone as a pollutant. Results indicated that the annual changes in the spatial distribution of NO2, HCHO, and O3 exhibited an increasing trend from south to north. Temporally, NO2 showed a wavy pattern with a peak in 2017, HCHO displayed an inverted V pattern peaking in 2018, and O3 followed a Z pattern with a peak in 2017. Monthly variations showed that both NO2 and O3 were highest in summer, followed by spring, autumn, and winter, while HCHO peaked in winter, followed by autumn, summer, and spring. Exogenous atmospheric transport significantly influences NO2 pollution in the Sahara Desert, as demonstrated by the HYSPLIT model’s analysis of backward trajectories and potential source areas over a decade of rainy and dry seasons. High-pollution areas are primarily affected by the southeastern Mediterranean monsoon and the southeastern Algiers winds. Annual spatial variations within ozone-sensitive control areas indicate that ozone is predominantly influenced by VOCs and NOx synergistic control. Monthly spatial variations show that NOx control dominates in autumn and winter, while VOCs control prevails in summer and fall.