On the lidar‐observed sandwich structure of polar stratospheric clouds (PSCs): 2. Numerical simulations of externally mixed PSC particles
On the lidar‐observed sandwich structure of polar stratospheric clouds (PSCs): 2. Numerical simulations of externally mixed PSC particles
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关于激光雷达观测到的极地平流层云（PSC）的夹层结构：2.外部混合PSC粒子的数值模拟
DOI：
10.1029/1999jd900331
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发表时间：
1999
影响因子：
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通讯作者：
T. Shibata
中科院分区：
文献类型：
--
作者：
T. Shibata
在微物理箱模式中，利用H2SO 4、HNO 3和H2O组成的三元溶液颗粒和硝酸三水合物（NAT）固体颗粒的混合物模拟极地平流层云（PSC）。模拟结果表明，散射比随着温度的降低而增加，接近冰点的冰没有伴随的去极化增加。当温度的下降停止在冰点以上几度时，随后观察到时间依赖性去极化增加。当固体颗粒的总数在有限的范围内，0.001-0.01/cm 3时，发现这种响应。该数量范围与通过光学颗粒计数器观察到的（大尺寸）颗粒数量浓度一致。
Polar stratospheric clouds (PSCs) were simulated via a mixture of (1) liquid-ternary-solution particles consisting of H2SO4, HNO3, and H2O, and (2) solid nitric acid trihydrate (NAT) particles in a microphysical box model. The simulations indicated that the scattering ratio increases as the temperature decreases to near the frost point of ice without a concomitant increase in the depolarization. When the decrease in temperature was halted a few degrees above the frost point, the time-dependent depolarization was subsequently observed to increase. This response was found when the total number of solid particles was in the finite range, 0.001–0.01/cm3. This number range agrees well with the (large size) particle number concentration observed via an optical particle counter.