The Scandinavian C0,-sampling in 1955 is described. The mean results for the calendar year are given. Earlier C0,-measurements are discussed and a figure showing most of these values is given. The theory of Callendar is discussed and the Scandinavian values are compared with Callendar's. The seasonal variations at the Scandinavian stations are compared and the results discussed. The possibility of drawing synoptic maps is discussed and one example is shown. The desirability of systematic COX-measurements on a global scale is emphasized.
The method is based on the reaction of ammonium nitrogen with hypobromite in an alkaline medium. The excess of hypobromite is determined spectrophotometrically by adding an azo dye (Bordeaux B) solution, which is decolorized by hypobromite in acid solution. The influence of e.g. organic compounds is eliminated by allowing the whole reaction to proceed in acid solution also. The standard curve is a straight line up to 400 micrograms of ammonium nitrogen per liter, and the reaction is sensitive to 10 micrograms per liter, equal to 0.01 ppm, as determined in 25 ml of sample.
Krogh and Brandt Rehbergs method for estimation of CO, in atmospheric air has been investigated and modified. The method is used for continous investigation of the C O , content of the air in Scandinavia. A permanent net of sampling stations has been established, 6 in Sweden, 4 in Finland, 3 in Norway and 2 in Denmark. The samples are taken three times each month. A simple method of taking air samples is described. Current
The method is based on the reaction of ammonium nitrogen with hypobromite in an alkaline medium. The excess of hypobromite is determined spectrophotometrically by adding an azo dye (Bordeaux B) solution, which is decolorized by hypobromite in acid solution. The influence of e.g. organic compounds is eliminated by allowing the whole reaction to proceed in acid solution also. The standard curve is a straight line up to 400 micrograms of ammonium nitrogen per liter, and the reaction is sensitive to 10 micrograms per liter, equal to 0.01 ppm, as determined in 25 ml of sample.
The Scandinavian CO2‐sampling in 1955 is described. The mean results for the calendar year are given. Earlier CO2‐measurements are discussed and a figure showing most of these values is given. The theory of Callendar is discussed and the Scandinavian values are compared with Callendar's. The seasonal variations at the Scandinavian stations are compared and the results discussed. The possibility of drawing synoptic maps is discussed and one example is shown. The desirability of systematic CO2‐measurements on a global scale is emphasized.
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