Pollack J B, Wood A T
Science. 1968 Sep 13;161(3846):1125-7. doi: 10.1126/science.161.3846.1125.
From comparison of theoretical and observed microwave brightness temperatures of Venus at 1.35 centimeters, the center of a water-vapor line, we obtain an upper limit of 0.8 percent for the water-vapor mixing ratio in the lower atmosphere. This limit is consistent with the amount of water vapor detected by Venera 4, the existence of aqueous ice clouds, and a greenhouse effect caused by water vapor and carbon dioxide. The computed spectra suggest that a sensitive procedure for detection of water vapor is examination of the wavelength region between I and 1.4 centimeters.
通过比较金星在1.35厘米（水汽谱线中心）处的理论和观测微波亮温，我们得出金星低层大气中水汽混合比的上限为0.8%。这一上限与金星4号探测器探测到的水汽量、水冰云的存在以及水汽和二氧化碳引起的温室效应相一致。计算得到的光谱表明，检测水汽的一个灵敏方法是检查1至1.4厘米之间的波长区域。
