Zur bestimmung der absoluten feuchte durch messung der absorption in den atmosphärischen wasserdampfbanden

Abstract

The possibility of describing the absorption of radiation in the near and middle infrared by the water vapor bands of the atmosphere with relations identical in form to that arrived at in synthetic atmospheres (6) will here be examined. Only two intensities are necessary to determine the amount of absorbing material between the source and detector after suitable calibration. The application of universal absorption relations (equivalent widths) will give results with systematic errors due to the impossibility of measuring directly the continuum without absorption in the free atmosphere. From the results of this work the humidity near the ground can now be measured. One important application of this “optical method” in contrast to the classical methods is that the humidity at very low meteorological temperatures can be measured. The measurement of humidity in the upper troposphere and the lower stratosphere will be discussed.