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Winter AOD trend changes over the Eastern Mediterranean and Middle East region
International Journal of Climatology ( IF 3.5 ) Pub Date : 2021-04-15 , DOI: 10.1002/joc.7139 Abdallah Shaheen 1, 2 , Renguang Wu 1, 3 , Jos Lelieveld 4, 5 , Robabeh Yousefi 6, 7 , Midyan Aldabash 8
International Journal of Climatology ( IF 3.5 ) Pub Date : 2021-04-15 , DOI: 10.1002/joc.7139 Abdallah Shaheen 1, 2 , Renguang Wu 1, 3 , Jos Lelieveld 4, 5 , Robabeh Yousefi 6, 7 , Midyan Aldabash 8
Affiliation
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The present study documents the winter aerosol optical depth (AOD) trends over the Eastern Mediterranean and Middle East (EMME) region using MERRA-2 and moderate-resolution imaging spectroradiometer (MODIS) collection 6.1 data. A significant upward AOD trend was identified during the years 2000–2010, whereas the AOD followed a significant downward trend during the years 2010–2017. Our analysis indicates that aeolian dust is the main contributor to AOD changes. The winter AOD changes are related to meteorological factors over the EMME region. During the early period (2000–2010), a significant decrease in sea level pressure induced dry and hot southeasterly winds blowing from the desert regions in the Middle East toward the EMME, which increased the temperature and reduced the relative humidity, thus enhancing evaporation and promoting soil drying. In contrast, during the late period (2010–2017), a significant increase in sea level pressure, accompanied by an increase in the North Atlantic Oscillation (NAO) index, induced northwesterly winds from higher latitudes, which decreased the temperature and increased the relative humidity, reducing dust mobilization in the EMME, in particular, in Iraq and Egypt. This shows to what extent AOD trends in the EMME region are controlled by changing meteorological weather conditions.
中文翻译：
东地中海和中东地区冬季 AOD 趋势变化
本研究使用 MERRA-2 和中等分辨率成像光谱仪 (MODIS) 收集 6.1 数据记录了东地中海和中东 (EMME) 地区冬季气溶胶光学深度 (AOD) 趋势。在 2000-2010 年期间发现 AOD 呈显着上升趋势，而在 2010-2017 年期间 AOD 呈显着下降趋势。我们的分析表明，风尘是 AOD 变化的主要贡献者。冬季 AOD 变化与 EMME 地区的气象因素有关。早期（2000-2010年）海平面气压显着下降，导致中东沙漠地区向EMME吹来干燥炎热的东南风，使温度升高，相对湿度降低，从而促进蒸发和蒸发。促进土壤干燥。相比之下，后期（2010-2017年）海平面气压显着升高，伴随北大西洋涛动（NAO）指数升高，诱发高纬度西北风，使气温降低，相对值升高。湿度，减少 EMME 中的灰尘移动，特别是在伊拉克和埃及。这表明 EMME 地区的 AOD 趋势在多大程度上受不断变化的气象天气条件的控制。
更新日期：2021-04-15
中文翻译：
东地中海和中东地区冬季 AOD 趋势变化
本研究使用 MERRA-2 和中等分辨率成像光谱仪 (MODIS) 收集 6.1 数据记录了东地中海和中东 (EMME) 地区冬季气溶胶光学深度 (AOD) 趋势。在 2000-2010 年期间发现 AOD 呈显着上升趋势，而在 2010-2017 年期间 AOD 呈显着下降趋势。我们的分析表明，风尘是 AOD 变化的主要贡献者。冬季 AOD 变化与 EMME 地区的气象因素有关。早期（2000-2010年）海平面气压显着下降，导致中东沙漠地区向EMME吹来干燥炎热的东南风，使温度升高，相对湿度降低，从而促进蒸发和蒸发。促进土壤干燥。相比之下，后期（2010-2017年）海平面气压显着升高，伴随北大西洋涛动（NAO）指数升高，诱发高纬度西北风，使气温降低，相对值升高。湿度，减少 EMME 中的灰尘移动，特别是在伊拉克和埃及。这表明 EMME 地区的 AOD 趋势在多大程度上受不断变化的气象天气条件的控制。
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