Intensified dust storm activity and Valley fever infection in the southwestern United States

Climate models have consistently projected a drying trend in the southwestern United States, aiding speculation of increasing dust storms in this region. Long-term climatology is essential to documenting the dust trend and its response to climate variability. We have reconstructed long-term dust cli...

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Veröffentlicht in:Geophysical research letters. - 1984. - 44(2017), 9 vom: 16. Mai, Seite 4304-4312
1. Verfasser: Tong, Daniel Q (VerfasserIn)
Weitere Verfasser: Wang, Julian X L, Gill, Thomas E, Lei, Hang, Wang, Binyu
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:Geophysical research letters
Schlagworte:Journal Article Valley fever aerosol air quality climate dust health
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520 |a Climate models have consistently projected a drying trend in the southwestern United States, aiding speculation of increasing dust storms in this region. Long-term climatology is essential to documenting the dust trend and its response to climate variability. We have reconstructed long-term dust climatology in the western United States, based on a comprehensive dust identification method and continuous aerosol observations from the Interagency Monitoring of Protected Visual Environments (IMPROVE) network. We report here direct evidence of rapid intensification of dust storm activity over American deserts in the past decades (1988-2011), in contrast to reported decreasing trends in Asia and Africa. The frequency of windblown dust storms has increased 240% from 1990s to 2000s. This dust trend is associated with large-scale variations of sea surface temperature in the Pacific Ocean, with the strongest correlation with the Pacific Decadal Oscillation. We further investigate the relationship between dust and Valley fever, a fast-rising infectious disease caused by inhaling soil-dwelling fungus (Coccidioides immitis and C. posadasii) in the southwestern United States. The frequency of dust storms is found to be correlated with Valley fever incidences, with a coefficient (r) comparable to or stronger than that with other factors believed to control the disease in two endemic centers (Maricopa and Pima County, Arizona) 
650 4 |a Journal Article 
650 4 |a Valley fever 
650 4 |a aerosol 
650 4 |a air quality 
650 4 |a climate 
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700 1 |a Wang, Julian X L  |e verfasserin  |4 aut 
700 1 |a Gill, Thomas E  |e verfasserin  |4 aut 
700 1 |a Lei, Hang  |e verfasserin  |4 aut 
700 1 |a Wang, Binyu  |e verfasserin  |4 aut 
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