whole vol. notrs. nortit atlantic 93 



Pressure. 



Site: The height of the barometer above INTean Sea Level was: 



1845 November to 192 1 January 1 1.3 m. 



1 92 1 Fel)rviary to 1923 25.0 m. 



,\11 vahies have been rechiced tcj Mean Sea Level by a]:»yily- 

 ing the following corrections: 



1845 November to 1921 January + 1.0 mm. 



1921 February to 1923 +--3 "n"- 



Hours: The values of j^ressure do not refer to a fixed hour, but 

 are the mean values of 3 to 6 observations a day. 

 The diurnal variation is negligible in comparison 

 with the variation from month to month. 

 Notes: All values have been corrected to normal gravity (Lat. 

 45°) by applying a correction of + 1.3 muL 

 Tkmperati'RI':. 



flours: The hours of observation are as follows: 

 1845 November to 1873 May. 7'\ 



'^ ^^73 J""e to 1923. 8'' 



1845 November to 1898 December. 14''. 

 1869 January to 1873 May. 12''. 

 1873 June to 1923. I4'\ 

 3. 1873 June to 1923. ^(8"+i4'0. 

 Precipitation. 



The height of the rim of the rain gage alcove the ground is 1.9 m. 



VE.STMANNO 

 Authority. 



Section Meteorologique de Loggildingarstofan, Reykjavik, 

 Iceland. 

 Pressure. 



Site: The height of the barometer above Mean Sea Level was: 



1881 to 192 1 August y.'/ m. 



1921 Septem1)er to 1923 132 m. 



All values have been reduced to Mean Sea Level by ai)ply- 

 ing the following corrections : 



1881 to 1921 August +0.7 mm. 



1 92 1 Septeml)er to 1923 between + 1 2.0 muL and + i 2.4 mm. 

 varying according to the mean dry bull) tempera- 

 ture. 

 This height correction is calculated according to Riihlmann's 

 fornnila in Jelinck's "Anleitung zur Ausfiihrung 

 meteorologi.scher Beoljachtungen," Wien, k. k. Zen- 

 tral-An.stalt fiir Meteorologie und Geodynamik. 



