No abstract

We present here some measurement results on the atmospheric methane column density obtained, in Zvenigorod in September 1997. The measurements have been carried out in parallel using several variants ofthe spectroscopic method and instrumentation. Thus obtained results showed that three different modifications of the method and measurement instrumentation that are normally used in long-term observations in different observation sites yield, when operated in one site, the data that agree quite well.

The results are given of the parallel measurements of water vapor, methane and carbon oxide in the atmosphere of St.Petersburg (Petrodvorets), Zvenigorod and Obninsk in July-August 1999. The measurement data obtained at the three sites made it possible to represent the spatiotemporal variability of the contents of each of the atmospheric gases studied for the European territory of Russia (ETR) in the form of the chart "latitude-day-content" with the use of the splines of mean daily contents. The dependence of the gases variability on synoptic conditions over the ETR was determined.