Absolut Lufttryk = 
Barometerhøjden (1—0.00259 cos 2 pm) (1—0.000000196 H) 
hvor g er Stedets Bredde og H Højden over Havet i Meter 1. 
Tyngdecorrectionen varierer fra + 0.7 mm ved 50° Bredde 
til + 1.9mm ved 80° Bredde, altsaa 1.2 mm fra Nordsgen 
til Nordspidsbergen. Denne Storrelse er ikke ringe i For- 
hold til de svage Lufttrykeradienter, hvormed vi have at 
gjøre 1 det normale Lufttryk over vort Nordhay. 
Den følgende Tabel giver det saaledes udledede nor- 
male Lufttryk for de Kyst- og Hav-Stationer, der ere 
benyttede til Bestemmelsen af sammes aarlige Fordeling 
over Nordhavet. 
112 
Absolute Atmospheric Pressure = 
Height of Barometer (1 —0.00259 cos 2 4) (1—0.000000196 #), 
in which q denotes the latitude of the place and H the 
height above the sea in metres.” The gravity-correction 
varies from + 0.7 mm., in lat. 509 N, to + 1.9 mm., in lat. 
80° N; thus, 1.2 mm. from the North Sea to North Spitz- 
bergen. This difference is anything but slight compared 
to the small gradients of atmospheric pressure wherewith 
we have to deal in the normal atmospheric pressure pre- 
vailing over the North Ocean. 
The following Table gives the normal Atmospheric 
Pressure thus found for the Coast and Sea-Stations, the 
results from which have been applied in determining the 
annual distribution of the pressure over the North Ocean. 
Mandal Skudesnes Bergen Florø Aalesund — Christiansund Brønø Bodø 
Bredde (Zat.) er 2 HO; 60° 24 61° 36” 62° 287 GB 7 65004287 GT! iT 
Lænede (Long.) 7 27 E. By IG 1D, SOME. Hå QB la @ iQ 18, [eel DE 19 13 1B 1240 24008 
Januar 760.6 759:3 758.2 757-5 756.4 756.3 755.8 754-9 
Februar 59.6 58.6 57.6 57.0 56.0 55.8 55.2 54.3 
Marts 59.1 58.6 57-9 EVA 56.6 56.5 56.0 55.2 
April 59.7 59.6 59.0 59.3 59.0 58.9 58.6 58.1 
Maj 61.0 61.2 60.5 60.6 60.4 60.6 60.3 60.1 
Juni 60.0 60.2 59.8 59.8 59.7 59.9 59.8 59.5 
Juli 58.9 58.9 58.5 58.4 58.3 58.5 58.4 58.2 
August 58.7 58.5 58.0 58.0 58.0 58.2 58.3 58.0 
September 58.9 58.4 57.9 57.8 57.4 57-4. 57.2 56.8 
October 58.5 57.9 57.2 56.8 56.2 56.3 56.4 56.1 
November EG 3772 56.5 56.3 55.7 5546 55.5 55.1 
December 58.0 57.0 56.3 55.9 54.9 54.9 54.8 54.5 
Aar (Vear) 759:2 758.8 758.1 757-9 757-4 757-4 757-2 756.7 
Tromsø Alten Vardø Stykkisholm ‘Akureyri Berufjord Thorshayn 
Bredde (Zat.) 69° 39” 69° 58’ TO? 22 GH? By 65° 40/ 64° 40/ ga 3 
Lænede (Long.) 18 58 E. 25 15 190 Hi” 8 IM, 22 46 Wi. 18 SW. 1AM ils) WW 6 44 W. 
Januar 753:3 754-5 754.0 747-3 749.2 750.1 752-7 
Februar 53.0 54.2 53-4 50.2 51.5 51.8 53:3 
Marts 54.0 54.8 53.9 54.9 56.1 56.5 56.3 
April 57-5 58.0 57.2 57.8 58.9 58.5 58.1 
Maj 69.1 60.8 60.5 60.2 60.8 å 61.0 60.8 
Juni 59.4 59.8 59.3 57.6 58.0 58.0 58.9 
Juli 58.4 58.5 58.8 57. I 57.1 57.0 57.6 
August 58.0 58.1 58.2 57-3 575 57.8 57-9 
September 156.2 56.9 56.6 54.7 55-3 55.1 56.0 
October 55.6 55-9 55-3 53.4 54.2 53.4 54.0 
Noyember 54.0 EGG 54.4 56.3 58.5 57:8 56.2 
December 53.6 BE oi 54.2 50.2 51.7 51.8 BAG 
Aar (Tear) 756.1 756.8 756.3 754-7 755-7 755-7 756.2 
1 
O. J. Broch. Accelération de la pesanteur. 
Mémoirs du bureau international des poids et mesures. 
