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Advances in Fog Microphysics Research in China
Duanyang Liu,Zihua Li,Wenlian Yan,Yi Li 한국기상학회 2017 Asia-Pacific Journal of Atmospheric Sciences Vol.53 No.1
Fog microphysical research in China based on field experiments obtained many important results in recent 50 years. With the fast development of China's economy, urbanization in the last 30 years, special features of fog microphysical structure also appeared, which did not appear in other countries. This article reviews the fog microphysical research around China, and introduces the effect of urbanization on fog microphysical structure and the microphysical processes as well as macroscopic conditions of radiation fog droplet spectral broadening. Urbanization led to an increase in fog droplet number concentration but decreases in fog liquid water content (LWC) and fog droplet size, as well as a decrease in visibility in large cities. Observations show that the radiation fog could be divided into wide-spectrum one, which is all extremely dense fog with the spectral width more than 40 μm, and narrow-spectrum one, most of which is dense fog with the spectral width less than 22 μm, according to droplet spectral distribution. During developing from dense fog to extremely dense fog, the widespectrum radiation fog is characterized by explosive deepening, that is, within a very short time (about 30 min), the droplet concentration increase by about one order of magnitude, droplet spectral broadening across 20 μm, generally up to 30-40 μm, or even 50 μm. As a result, water content increased obviously, visibility decreased to less than 50 m, when dense fog became extremely dense fog.
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Qin Yujia,Ullah Farman,Fang Yan,Singh Sandeep,Zhao Zhonghua,Zhao Zihua,Li Zhihong 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.4
The peach fruit fly (PFF), Bactrocera zonata (Diptera: Tephritidae), is among the most destructive Bactrocera fruit fly species in Asia and Africa. The peach fruit fly is currently absent from China but has high risk of invasion to China. This study primarily quantifies the direct potential economic impact of B. zonata in China using Monte Carlo simulation model, taking peaches as the example hosts. The results showed that under nil management scenario, the potential economic loss in China caused by B. zonata would be 0.82–3.07 billion dollars (90% confidence level), and potential savings after management will be 0.20–1.00 billion dollars (90% confidence level). Quarantine measures against B. zonata and field control should be strengthened to prevent its introduction and reduce the potential economic impact in China.
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