نتایج جستجو برای: 27426 and 27119 days
تعداد نتایج: 16833156 فیلتر نتایج به سال:
Abstract Atmospheric circulation is a vital process in the transport of heat, moisture, and pollutants around globe. The variability rainfall depends to some extent on atmospheric circulation. This paper investigates synoptic situations southern Africa that can be associated with wet days dry Free State, South Africa, addition underlying dynamics. Principal component analysis was applied T-mode...
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BACKGROUND The spread of influenza and highly pathogenic avian influenza (H5N1) presents a significant threat to human health. Avian influenza outbreaks in downwind areas of Asian dust storms (ADS) suggest that viruses might be transported by dust storms. OBJECTIVES We developed a technique to measure ambient influenza and avian influenza viruses. We then used this technique to measure concen...
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