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91
I de fleste Maaneder er saaledes Havoverfladens
Temperatur merkelig linjere end Luftens, og i Gjeimemsnit for
Aaret henimod 2° (1».«) højere. Havoverfladen modtager
kun i et Par Vaar- og Sommer-Maaneder li.lt Varme fra
Luften, ellers giver den stadig Varme til Luften. Havets
Temperatur i Overfladen hidrører saaledes væsentlig fra
andre Kilder, ligesom Dybets.
Isothermkarternc Pl. XVI og følgende vise, at
Havets Temperatur langs Norges Kvst har sin Oprindelse fra
Atlanterhavet, hvorfra Varmen forplantes ved Strømninger,
isothermernes Tungespidser eller Varmeaxerlie vise os disse
Strømningers Løl) langs Norges Kyst.
Hence, during most months of the year the
temperature of the sea-surface is considerably higher than that of
the air. and the mean annual difference reaches close upon
2° (1°.8). During one or two of the summer-months ouly
does the sea-surface get a trifling amount of heat from the
atmosphere; tile rest of the year it steadily continues giving
oft’ heat to the air. Tile temperature of the sea at the
surface must, therefore, be chiefly derived from other sources,
as is the case ivitli that of the deep.
The Maps of Isotherms, Pl. XVI and following,
show the temperature of the sea along the coast of
Norway to have its origin in the Atlantic, whence the heat is
propagated by currents. The isothermal tongues, or axes
of heat, exhibit those currents in their course along
tin-coast of Norway.
7. Temperaturens aarlige Vandring i lie øverste Lag.
Dell Maade, paa hvilken Temperaturen i Havet
varierer i Aarets Løb i de øverste Lag indtil 100 Favnes
Dybde, fortjener en nærmere Undersøgelse, da den
frembyder flere merkelige Trask og er bestemmende for den
midlere aarlige Fordeling af Temperaturen i disse Lag.
Sammenhængende Iagttagelser til at studere
Temperaturens aarlige Gang i Dyllet have vi fra Lødingen og
fra Altenfjorden, som ovenfor nævnt (Side 87 og 88).
7. Annual Variation of Temperature in the Upper
Strata.
The manner wherein the temperature of the sea varies
throughout the year in the upper strata down to a depth
of 100 fathoms, deserves a closer investigation, presenting
as it does various remarkable characteristics, and
determining the distribution of the mean annual temperature in
those strata.
Continuous observations for the study of the annual
variation of the temperature in the deep, have been taken
at Lødingen and in the Altenfjord, as stated above (pp. 87.88).
Lødingen.
n -1..U’ .Tauuar M ni .Inn .rul Au gmt September October Nove mber Dece mber
, Dr f Ut)
(tons 1880 1881 1879 1880 879 880 1879 1880 1879 1880 1879 1880 1879 1880 1879 1880 879 1880
0 0 3.0 3.1 4-1 5-4 6.9 7-1 11.4 0.1 13.7 11.8 10.7 10.5 9-3 7-0 6.9 3-7 5-0 4-4
10 18 3.8 =-7 3.8 4.9 6.2 6.6 9-5 8.9 10-5 10.8 10.6 ■o-S 9-5 7-7 7-4 4-3 5-4 2.8
30 37 4.0 3.: 3-5 4-5 5-4 5-8 6.9 7-3 8.1 8.7 10.5 10.1 ,.8 8.3 7.6 5-5 5-7 3-7
30 55 4-4 4-4 3-9 4.6 5-2 5-3 5-8 5-8 6.4 7-2 9.6 7.0 9-9 7-9 7-7 7-3 5-9 5-3
40 73 4-9 5." 4-7 5-2 5-4 5-2 5-9 5-4 6.0 5.8 8.8 6.0 10.2 7,0 7.8 7-4 6.4 6.4
50 92 5-3 5-7 5-15 5-5 5-7 5-3 6.1 5.6 6.0 6.0 8.4 6.0 10.2 6.4 7-5 6-7 6.4 6-5
70 130 6.4 C,.3 6.2 6.0 6.1 -9 C.3 6.2 6.2 6.1 7-8 6.2 8.1 6.0 7-1 6.2 6.6 fi. 3
100 188 6.4 6.3 6.4 6.4 6.3 6.3 6.6 6.5 6.5 6.4 6-3 6.4 6.3 6.3 6.4 6.4 6-3 6.3
Tages Middel af be gge Hækker faaes: I Taking the mean of both ser: es. wc get -
Favne. Meter. .Inn. Maj. Juui Juli Aug. Sept. Oct. Nov. Dec. Aar Var.
(«»..) (lear)
0 0 2».6* 4".8† 7".°† io°.8| ■2".3† o".6† g.,. 5°-3* 4".7t 5"9 9".7
10 18 3 -3 4-4 6.4 9-2 10.7 10.6 8.6 5-7 4.1* 5 -8 7-4
20 37 3-f> 4.0« 5-6 7-1 8.4 0.3 9.0† 6.6 4 -7 5 -5 6.7
30 55 4 4 4 -3 5-3* 5-8 6.8 8.3 8 .9 7-5 5.« 5 -5 4.6
40 73 5 .0 5-o 5 -3 5-7* 5-9* 7-4 8.6 7.6† 6.4 5 -6 3-6
5° 92 5 -5 5 .6 5 -5 5 -9 6.0 7 •= 8.3 7 -1 «■S† 5 -7 3.8
70 130 6.3 6 .1 6.0 6.2 6.2 7 -0 7-1 6.6 6.4 5 1 i .1
100 188 6.4† 6.4† 6.3† 6.5† 6-5† 6.4* 6-3* 6.4» 6.3* 6.4 0 .3
Disse Temperaturrækker ere fremstillede grafisk i These serial temperatures are represented diagram-
Pl. XXVI Lodingen. matically in Fl. XXVI — Lødingen.
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