The Characteristics and Evolution of Orographic Snow Clouds under Weak Cold Advection
The Characteristics and Evolution of Orographic Snow Clouds under Weak Cold Advection
复制标题
弱冷平流作用下的地形雪云特征及演化
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Hideyuki Watanabe
中科院分区：
文献类型：
--
作者：
K. Kusunoki;M. Murakami;M. Hoshimoto;N. Orikasa;Yoshinori Yamada;H. Mizuno;Kyosuke Hamazu;Hideyuki Watanabe
1999年2月25日，在日本中部山脉西侧，气旋风暴后的冬季季风在弱冷平流条件下形成地形雪云。来自ka波段多普勒雷达、微波辐射计、水流星视频探空仪和2D Grey成像探头的数据提供了独特的数据集，用于分析中尺度和微尺度结构的演变，特别是与周围条件变化相关的冰和过冷液态水（SLW）的演变。在本例中，确定了云的演变过程中的四个阶段：层状(I)、过渡（II）、浅对流（III）和消散（IV）。在第一阶段，发生了大量的低层气流阻塞。回声顶部相对平坦，回声模式呈层状，有亮带。云层被认为几乎被冰川覆盖，主要是由于冰晶的沉积生长。斜坡上的风速在后期逐渐增大。
Abstract On 25 February 1999, on the western side of the central mountain range of Japan, orographic snow clouds had formed under conditions of weak cold advection due to a winter monsoon after a cyclonic storm. The data from Ka-band Doppler radar, microwave radiometer, hydrometeor videosondes, and 2D Grey imaging probe provided unique datasets that were used to analyze the evolution of meso- and microscale structures, especially ice and supercooled liquid water (SLW) evolutions associated with variations in surrounding conditions. In the present case, four stages were identified in the evolution of the clouds: stratiform (I), transition (II), shallow convective (III), and dissipating (IV). During stage I, substantial blocking of the low-level flow occurred. The echo top was relatively flat and the echo pattern was stratiform with a bright band. The clouds were considered to be almost glaciated, primarily by the deposition growth of ice crystals. The wind speed up the slope gradually increased in the latt...