5 - 



APPENDIX C: KNUDSEN 



We see from this table, that the maximum difference in the air-temperature 

 occurs in March and is no less than 67°. Further, we see that the cooling effect 

 of the Polar Stream is in a high degree evident throughout the whole year, and 

 is much greater in winter and spring than in summer (67° temperature difference 

 in March against 1-5° in July). 



With regard to the temperature throughout the year, it has to be remarked, 

 that the minimum-temperature occurs in January and the maximum in August 

 (end of July), when the wind comes from the Gulf Stream; whilst, on the other 

 hand, the minimum falls in 

 March and the maximum in 

 July when the wind comes 

 from the East Icelandic Polar 

 Stream. This appears clearly 

 from the curves shown in Fig. i. 

 From the two components, the 

 air-temperature conditioned by 

 the Gulf Stream and that con- 

 ditioned by the East Icelandic 

 Polar Stream, we might ascer- 

 tain the monthly average- 

 temperature. In this case, how- 

 ever, we should not leave any 

 of the observations out of 

 account and must in any case, 

 have regard for the number of 

 days included in both groups, 

 in order to obtain the true 

 mean-temperature. If we pass 

 over the temperatures not 

 included and form the average 

 value from the two temperature- 

 series , by giving the weight 

 987 to the numbers of the first 

 series on the table and the 

 weight 849 to those of the 



second, we obtain the monthly temperatures shown in the first colunni of the 

 following table. In the second column are given the actual mean-temperatures as 

 calculated for a period of 25 years ". It will be seen from this table and the 

 accompanying curve (Fig. 2), that the two series of the temperatures agree well 

 together. 



• Meteorologiske Middeltal og Extremer for Fseroerne, Island og Grönland. Appendix til det 

 Danske Meteorologiske Instituts Aarbog. 1895. II Del. pag. 5. 



2 The upper curve signifies: "Temperature with wind from the Gulf Stream", the lower curve; 

 "Temperature with wind from the Polar Stream". 



ûec Jan. Feb Morz 



'prU Ml Juni Jul, Jug. Sept OU Aou. Dec. 



;Fig. 1 = 



