570 H. MOHN. METEOROLOGY. [norw. POL. EXP. 



THE DISTRIBUTION OF ATMOSPHERIC PRESSURE 



AND TEMPERATURE OF THE AIR AROUND 



THE NORTH POLE. 



As the Fiam reached higher northern latitudes than any well-equipped 

 meteorological expedition or station, and brought back a series of exceedingly 

 well made observations covering a period of three years, from a region hitherto 

 unvisited by man, I have felt it worth while to construct new charts, showing 

 by means of isobars and isotherms the distribution of the atmospheric pressure 

 and the temperature of the air over the arctic regions, utilising for this purpose, 

 and for the regions around the North Pole, the results found from the observa- 

 tions made by the officers and crew of the Fram. In order to connect these 

 results with those found for lower latitudes, I have extended the charts 

 to the 60*'^ degree of latitude, and for this purpose have made use of the 

 following publications. 



For the construction of the isobaric charts. 



1. Khma-Tabeller for Norge. II. Lufttryk. Af H. Mohn. Videnskabs- 

 selskabels Skrifter. I. Math, naturv. Klasse. 1896. No. 1. 



2. La Pression atmosph6rique moyenne en Suede, 1860—1895, par H. E. Ham- 

 berg. Stockholm, 1898. 



3. Osservazioni scientifici eseguite durante la spedizione polare di S. A. R. 

 LuiGi Amadeo di Savoia, duce degli Abruzzi 1899—1900. 



4. Atlas climatologique de I'empire de Russie public par I'Observatoire Phy- 

 sique Central Nicolas. St. Petersburg, 1900. 



5. Pacific Coast Pilot. Coasts and Islands of Alaska. Second Series. Appen- 

 dix 1. Meteorology. W. H. Dall. Washington, 1879. 



