Borno 



Afov. DecJ910 



7 3 5 7 9 11 13 15 17 19 Kt 83 Z5 fl7 £3 1 3 











































































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30000 HL. 



Fig. 7. 



The diagram shows the upheaval of the undermost water- 

 layers represented by the isohalines of 33, 32 and 30 °/ 00 (which 

 occurred 3 times in November 1910) and the sudden subsidence 

 of the waterlayers the 16—17 Nov. (eclipse day) and the 29 Nov.— 

 1 Dec. (new moon). 



This instance alone shows that the submarine waves are not 

 incidental movements of the water caused by meteorologic agents 

 such as changes in the atmospheric pressure, winds o. s. a. 



The real proof of their tidal nature, however, is that they reappear 

 on the same date in a succession of years. Thus the moon-waves 

 of 1909 reappear and can be identified in the wave-series of 1910, 

 and 1911. Not so, however, that the wave of, say 7th Febr. 1909, 

 will return on the 7th Febr. of 1910 and 1911. Next year's wave 

 appears 10 — 11 days earlier than the wave of the previous 

 year. In the diagram representing the moon-waves of the Gullmar- 

 fjord in 1909, 1910 and 1911 the dates are so arranged that the 



Borno 



Corresponding Moon-waves 



observed in the Gullmar-fjord during the winter- 

 months 1909, 1910 and 1911. 



The fulldrawn line represents the declination of 

 the moon. 



The dotted line represents the daily variation 

 of the tide-generating force of the sun and the moon 

 at the Lat. of the Station Borno. 



a, b, c, d etc. denote the corresponding boundary 

 waves in the years 1909, 1910 & 1911. 



50,000 H L; 35,000 H L etc. the weekly catch 

 of herrings in the Cattegat. 



The isohalines of 34°/ 00 , 33% , 32°/ 00 and 30%, 

 are represented by fulldrawn lines. 































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BornO 



"November December 1909 



12 l<t 16 IS 20 S2 t<t 26 28 30 E <t G B TO 12 ft 16 W 80 22 2k 26 SB 50 1 3 5 7 



Mars 1910 



IS 15 17 19 21 23 25 27 29 31 2 "i G 8 10 12 l'» 1G 18 20 ge It. 2G 28 g h G 8 10 



SS50 42520 18925 21245 17950 60795 3007G 29000 3750 '.5716 126395 1685 21k 19882 



November December 1910 Januari 



30 1 3 5 7 9 11 13 15 17 19 21 23 25 27 g9 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 SI 2 •, 6 8 10 12 m 16' 18 20 22 2-. 26 28 30 1 



Feti-uari 1911 



13 15 17 19 21 23 25 27 1 3 5 7 9 1] IS 1911 



Fig. 8 & 9. 



wave of Febr. 7 1909 is placed above the wave of 29 Jan. 1910. 

 In the second diagram we see this wave placed above that of 19 

 Jan. 1911. Arranged in this manner the analogy is quite obvious. 

 The difference in the dates at first puzzled me till I found the simple 

 solution. 



The lunar year is 10 days shorter than the solar. It comprises 

 12 synodic lunar revolutions, each of 29,531 days, and 13 tropic 

 periods of declination of 27,399 days each. Thus the same lunar 

 phase will recur after nearly 355 days and the moon will attain almost 

 the same declination north or south. 



12 x29,531 (synodic revolutions) = 354,57 days 



13 x27,399 (periods of declination) = 355,18 days. 

 This means: 



1) That the phase and declination of the moon influences the 

 movements in the oceanic border-layer. 



2) That if the moon's synodic period of revolution and period 

 of declination at a certain season unite in raising a submarine wave 

 somewhere in the sea, it is not to be expected that new waves 

 will appear regularly every 14th (or 7th) day except for ajimited 

 space of time on either side of the epoch. One month or two before 



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