Elterman L, Toolin R B, Essex J D
Appl Opt. 1973 Feb 1;12(2):330-7. doi: 10.1364/AO.12.000330.
In this paper we present measurement results obtained in New Mexico with bistatic optical probing of the atmosphere using a searchlight beam. The data yield vertical profiles of the aerosol attenuation coefficient. Because they approximate proportionality to aerosol concentration, these profiles provide information concerning the aerosol layer structure and its parameters. During a 9-day period in October and November 1970, a series of forty-one such profiles was obtained which includes altitudes 12-25 km, selected for study because of the relatively high aerosol content of this stratospheric region and its relation to global climate. The mean stratospheric aerosol distribution for this period is double layered with maxima at 15.6 km and 19.3 km. An early phase of volcanic dust incursion is examined. A chronology of stratospheric aerosol concentration levels is developed based on measurements with the same instrumentation at the same sites since February 1963. The chronology shows that the particulate background level of a nonvolcanic, nonpolluted stratosphere is represented by an aerosol optical thickness Tau(p)(O.55 micro) = 2.0 x 10(-2). A calculation with this background level is included, which indicates feasibility of a laser-satellite method for acquiring data related to global climate. The Appendix introduces an original method of numerical integration (used in the calculations), which is suited to radiative transfer studies.
在本文中，我们展示了在新墨西哥州使用探照灯光束对大气进行双基地光学探测所获得的测量结果。这些数据给出了气溶胶衰减系数的垂直分布。由于它们与气溶胶浓度近似成正比，这些分布提供了有关气溶胶层结构及其参数的信息。在1970年10月和11月的9天时间里，获得了一系列41个这样的分布，其涵盖了12 - 25千米的高度，选择该区域进行研究是因为该平流层区域气溶胶含量相对较高及其与全球气候的关系。该时期平流层气溶胶的平均分布是双层的，最大值出现在15.6千米和19.3千米处。研究了火山尘侵入的早期阶段。基于自1963年2月以来在相同地点使用相同仪器进行的测量，建立了平流层气溶胶浓度水平的年表。该年表表明非火山、无污染平流层的颗粒背景水平由气溶胶光学厚度Tau(p)(0.55微米)= 2.0×10⁻²表示。文中包含了以此背景水平进行的计算，其表明了激光卫星法获取与全球气候相关数据的可行性。附录介绍了一种数值积分的原始方法（用于计算中），该方法适用于辐射传输研究。
