期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
黄土高原PM_(2.5)质量浓度与微雨事件的权衡−协同关系演化
1
作者 吴桐 马蓓蓓 +3 位作者 庞先峰 曹立国 袁水妹 宋永永 《地理科学》 CSSCI CSCD 北大核心 2024年第4期721-732,共12页
基于权衡−协同关系视角,从长时间序列和多层次空间尺度探讨1998—2017年黄土高原PM_(2.5)质量浓度与微雨事件的作用关系、时空演化及地域分异。结果表明:①黄土高原PM_(2.5)质量浓度和微雨事件均表现出以5 a或4 a为周期的“三峰三谷”... 基于权衡−协同关系视角,从长时间序列和多层次空间尺度探讨1998—2017年黄土高原PM_(2.5)质量浓度与微雨事件的作用关系、时空演化及地域分异。结果表明:①黄土高原PM_(2.5)质量浓度和微雨事件均表现出以5 a或4 a为周期的“三峰三谷”波动小幅上升趋势。②PM_(2.5)质量浓度和微雨事件间的作用关系呈现出“过程上的协同性+增量上的权衡性”特征;从过程演化来看,协同关系是研究期内黄土高原PM_(2.5)质量浓度和微雨事件的主导关系,但从基于倾斜率的增量变化上看,二者以异向的权衡关系为主导,表明微雨事件的强化在黄土高原未来的雾霾治理中具有重要意义。③不同微雨事件指标与PM_(2.5)质量浓度的空间关系和演化趋势存在差异;冬春季节微雨事件,尤其是冬春微雨天数与PM_(2.5)质量浓度的作用关系明显强于年尺度。④PM_(2.5)质量浓度和微雨事件权衡−协同关系及演化在不同治理分区差异显著,城镇化和工业化水平较高的河谷平原区和土石山区是二者关系敏感区。 展开更多
关键词 PM_(2.5)质量浓度 微雨事件 权衡−协同 雾霾 黄土高原
下载PDF
Cloud microphysical differences with precipitation intensity in a torrential rainfall event in Sichuan, China 被引量:5
2
作者 HUANG Yong-Jie CUI Xiao-Peng WANG Ya-Ping 《Atmospheric and Oceanic Science Letters》 CSCD 2016年第2期90-98,共9页
High-resolution data of a torrential rainfall event in Sichuan, China, simulated by the WRF model, were used to analyze the cloud microphysical differences with precipitation intensity. Sixhourly accumulated rainfall ... High-resolution data of a torrential rainfall event in Sichuan, China, simulated by the WRF model, were used to analyze the cloud microphysical differences with precipitation intensity. Sixhourly accumulated rainfall was classified into five bins based on rainfall intensity, and the cloud microphysical characteristics and processes in different bins were studied. The results show that:(1) Hydrometeor content differed distinctly among different bins. Mixing ratios of cloud water, rain water, and graupel enhanced significantly and monotonously with increasing rainfall intensity. With increasing precipitation intensity, the monotonous increase in cloud water number concentration was significant. Meanwhile, number concentrations of rain water and graupel increased at first and then decreased or increased slowly in larger rainfall bins.(2) With precipitation intensity increasing, cloud microphysical conversion processes closely related to the production of rainwater, directly(accretion of cloud water by rain(QCLcr) and melting of graupel(QMLgr)) or indirectly(water vapor condensation and accretion of cloud water by graupel), increased significantly.(3) As the two main sources of rainwater, QCLcrincreased monotonously with increasing precipitation intensity, while QMLgr increased slowly, even tending to cease increasing in larger rainfall bins. 展开更多
关键词 cloud microphysics cloud microphysical processes torrential rainfall numerical simulation
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部