Interdecadal shift in the impact of winter land–sea thermal contrasts on following spring transcontinental dust transport pathways in North Africa
Qi Wen,Yan Li,Mengying Du,Wenjun Song,Linbo Wei,Zhilan Wang,and Xu Li
Qi Wen
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China
Mengying Du
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China
Wenjun Song
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China
Linbo Wei
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China
Zhilan Wang
Key Laboratory of Water Security and Water Environment Protection in Plateau Intersection, Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China
Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu, Key Laboratory of Arid Climatic Change and Disaster Reduction of CMA, Lanzhou 730020, PR China
Xu Li
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China
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We find that, through an interdecadal coupling of sea–land thermal forcing, the North Atlantic Oscillation, and the westerly jet, springtime dust from North Africa has been more likely to be transported eastward (extending into North America) since the late 1990s, whereas before that time, westward transport paths were more frequent. Under the influence of thermal forcing, wind speed and drought contribute to dust emissions in the two periods, respectively.
We find that, through an interdecadal coupling of sea–land thermal forcing, the North Atlantic...