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首页> 外文期刊>農業気象 >Artificial rainfall experiment by seeding of liquid carbon dioxide above the Izu Islands of Tokyo on December 15-16 in 2013
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Artificial rainfall experiment by seeding of liquid carbon dioxide above the Izu Islands of Tokyo on December 15-16 in 2013

机译：2013年12月15日至16日在东京伊豆群岛上空注入液态二氧化碳进行人工降雨实验

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摘要

An artificial rainfall technique of liquid carbon dioxide (LCD) was used in experiments operated on Nii, Miyake and Mikura Islands in the Izu Islands of Tokyo in Japan on December 15-16, 2013. On Dec. 15, rain particles or graupel pellets struck the aircraft front window and virga or rain was observed under a cloud from the aircraft on the east leeward-side of the seeded area under the condition of thin cloud of 760 m in depth until 30 minutes. On Dec. 16, rain or graupel struck the aircraft front window at 15 minutes after seeding and virga or rain under the cloud was observed at 37 minutes after the seeding under the condition of a thinner cloud of 610 m in depth. On Dec. 15, rain was recognized along the route of the seeding and a line-type trail of cloud disappeared was visibly recognized with an average width of 2 km. The development and disappearance of clouds were evaluated using satellite images near Mikura Island. On Dec. 16, a cloud developed immediately after the seeding and a line-type cloud running in the NNE-SSW direction was recognized on the satellite image. The cloud developed decreased in scale due to rain and the cloud disappeared was also recognized on a satellite image near Nii Island. On Dec. 15, an analysis showed the existence of following local effects of the seeding; the development of clouds at 700 hPa level higher than the seeding height, the appearance of rain at 850 hPa level around the seeding height, rainfall (virga) and a drastic increase in relative humidity at 925 hPa level lower than the seeding height, and finally the occurrence of artificial rains that were clarified by the upper weather maps based on meso scale model (MSM). The artificial rainfall experiments were succeeded.
机译：2013年12月15日至16日，在日本东京伊豆群岛的Nii，Miyake和Mikura群岛进行的实验中，使用了液态二氧化碳（LCD）的人工降雨技术。12月15日，降雨粒子或水up颗粒击中在深度为760 m的薄云条件下，直到30分钟，在播种区东风侧的飞机云层下观察到飞机前窗和处女座或降雨。 12月16日，播种后15分钟，雨水或graupel击中了飞机的前窗，播种后37分钟，在深度为610 m的薄云的条件下，观察到了云层下的零星或雨水。 12月15日，在播种过程中发现了降雨，可见线型云团消失了，平均宽度为2 km。使用Mikura岛附近的卫星图像评估了云的形成和消失。 12月16日，在播种后立即形成了云，并在卫星图像上识别了沿NNE-SSW方向运行的线型云。由于下雨，形成的云的规模减小，并且在Nii岛附近的卫星图像上也认识到云的消失。 12月15日，分析表明存在以下局部播种效应;在高于播种高度的700 hPa处出现云的发展，在播种高度附近的850 hPa处出现降雨，降雨（virga）以及在低于播种高度的925 hPa处相对湿度急剧增加，最后基于中尺度模型（MSM）的高层天气图已澄清了人工降雨的发生。人工降雨实验成功。

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