摘要
近期的研究结果认为: 雹云中存在着冰雹“穴道”, 它是由流场和水凝物粒子场相互作用决定的。“穴道”把雹胚形成区和大雹生长区联结成通道, 它对冰雹粒子具有明显的动力吸引作用, 可使大粒子向这里集中, 在宏观上呈现出冰雹粒子的动态累积效果; 涵盖冰雹“穴道”的区域即为播撒人工防雹的“作用区”, 它一般位于主上升气流边侧的主入流区和相对水平速度接近于零的零域(线)附近的下侧等。这些理论结果尚需观测验证和重复再现, 本文利用 Doppler雷达观测事例来作验证, 并引用前人的工作在此稍作物理加工后复现这些理论结果。
Recent numerical simulations show that there are cave channels (CC) in hail clouds, which depend on the interaction between the stream and hydrometeor field; one end of the CC connects with embryoformation area, and the other with large stone formation area; while moving round the zero line of horizontal wind, particles concentrates to the CC, result in the accumulation of particles can be found in a whole. Target area should include the CC, which locates at the flank of the main updraft and closely below the zero line of horizontal wind and so on. In this paper, the above were verified by Doppler radar observations and be reproduced on the basis of some reliable researchos.
出处
《高原气象》
CSCD
北大核心
2005年第1期77-83,共7页
Plateau Meteorology
基金
世界银行第四期对华技术合作项目(A3)
河北省自然科学基金项目(401485)
国家自然科学基金项目(40275001)共同资助
