Airborne lidar observations in the wintertime Arctic stratosphere: Polar stratospheric clouds
Airborne lidar observations in the wintertime Arctic stratosphere: Polar stratospheric clouds
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冬季北极平流层机载激光雷达观测：极地平流层云
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
A. Tuck
中科院分区：
文献类型：
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作者：
E. Browell;C. Butler;S. Ismail;P. A. Robinette;A. Carter;N. S. Higdon;O. B. Toon;M. Schoeberl;A. Tuck
作为1989年北极航空平流层考察的一部分，利用多波长机载激光雷达系统测量了冬季北极平流层极地平流层云的分布及其光学特性。在1月6日至2月2日期间的10次飞行中观测到了进入极涡的PSC。在温度为≤195K的14-27公里高度范围内，发现了两种不同光学特征的气溶胶(Ia和Ib型)，它们被认为是由三水硝酸组成的。Ia型PSCs在运行603次时通常表现出低散射比(1.2-1.5)和高气溶胶去极化(30-50%)，而Ib型PSCs具有更高的散射比(3-8)和较低的气溶胶去极化(0.5-2.5%)。在≤190K温度下，观察到水冰PSC(类型2)具有高的散射率(>；10)和高的气溶胶去极化(>；10%)。
Polar stratospheric cloud (PSC) distributions in the wintertime Arctic stratosphere and their optical characteristics were measured with a multi-wavelength airborne lidar system as part of the 1989 Airborne Arctic Stratospheric Expedition. PSCs were observed on 10 flights between January 6 and February 2, 1989, into the polar vortex. The PSCs were found in the 14–27 km altitude range in regions where the temperatures were ≤195 K. Two types of aerosols with different optical characteristics (Types Ia and Ib) were observed in PSCs thought to be composed of nitric acid trihydrate. Type Ia PSCs typically exhibited low scattering ratios (1.2–1.5) and high aerosol depolarizations (30–50%) at 603 run, while Type Ib PSCs had higher scattering ratios (3–8) and lower aerosol depolarizations (0.5–2.5%). Water ice PSCs (Type 2) were observed to have high scattering ratios (>10) and high aerosol depolarizations (>10%) at temperatures ≤190 K.