70 



H. MOHN. 



-N. Kl. 



to sea-level, and grouping the differences At round each of the latitudes 

 79" to 90", we arrive at the numbers in the following Table. 



Temperature Framheim minus Latitude Sea-level. 



The weighted means show that the differences Framheim — Latitude 

 run in an irregular manner, on an average increasing. The mean for the 

 Barrier is -|- i*'.32 and for the Plateau -h i''.o5. There is an average increase 

 of4-o0.2o per degree of latitude. The mean date is December 15*''. 

 Taking, with Julius v. Hann^, the mean temperature for December at 

 Framheim to be — 4''.6, we get from Capt. Amundsen's observations for 

 December the mean temperature at sea-level. 



Lat. 79° 

 Temp. — 4°. 7 



86° 87° 

 .1 — 6 .3 



89° 90° 

 - 6° 7 - 6°.9 



80° 81° 82° 83° 84° 85° 



o o o _o _ o o 



4 -9 — 3 1 - 5 -3 — 5 -5 - 3 -7 — 5 -9 



hl December, 191 1, the mean temperature of Framheim was — ô'^.y and 

 the computed temperature at sea-level at the Pole — 9^.8. 



The mean temperature of the air over the Arctic Polar Sea I have 

 found to be ^ 



Lat. 80° Lat. 85° Lat. 90° 



Lat. North June — i°.r — i°.7 — a. o 



Lat. South. Dec. — 4.9 — 5.9 — 6.9 



Diflf. N — S + 3.8 -I- 4.2 + 4.9 



3. The interdiurnal Variability of Temperature, 



Oct. Nov. Dec. Jan. Barrier Plateau 



Journey ± 5°.7 ± 3°.i ± 1° .-, ± i" .g ± 4^.4 ± i°.6 

 Framheim 5.5 2.5 1.6 1.7 



1 Met. Zeitch. 1914, p. 553. 



2 The Norwegian North Polar Expedition 1893 — 96. Scientific Results edited by Fridtjof 

 Nansen, Vol VL Meteorology by H. Mohn. p. 575. 



