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[-Temperaturinterval.-]{+Temperatur- interval.+} Midlere Temperatur. Midlere
Kvælstofmængde. Beregnet
Kvælstofmængde. Ditt’erents.
under io" 6°.5 13.2 12.9 —0.3
10—15 I 2 .1 12.0 il.6 —0.4
15—20 16 .9 I i.o 10.51 —0.5
Her tindes altsaa overalt en Kvælstofgehalt svarende
til en noget lavere Temperatur end den observerede og det
i stærkest Grad for de høiere Temperaturer, eller cla
Temperaturen aftager med Dybden, for de øverst liggende
Vandlag. Naar man erindrer, at .Jacobsens Observationer
ere udførte i Eftersommeren og for det Meste paa
Vandprøver fra saa smaa Dyb. at Luft- og Vandtemperaturens
aarlige Variation kan tænkes at have gjort sig gjældende,
vil dette ikke være saa vanskeligt at forklare gjennem
Vandets Opvarmning i Sommermaauederne, medens
Kvælstofmængden maa antages at rette sig efter en Temperatur
mindst lige saa lav som den aarlige Middeltemperatur.
At lignende Phænomener ikke ogsaa ere observerede
i de øvre Lag af det af den norske Nordhavsexpedition
undersøgte Hav. har sin simple Forklaringsgrund deri. at
Lufttemperaturen der selv om Sommeren ikke er høiere
end Overfladetemperaturen hellere omvendt.
VS
Intervals of Temperature. Mean Temperature. Mean Amount of Nitrogen. Computed Amount of Nitrogen. Difference.
below 10" 6"-5 13-2 12.9 —0-3
10—15 12 .1 ’ 12.0 11.6 —0.4
15—20 l6 .9 11.0 10.5 1 —0-5
The proportion of nitrogen in this Table corresponds
accordingly to a somewhat lower temperature than that
observed, especially for the higher temperatures, or rather,
since the temperature diminishes with the depth, for the
upper strata of the water. If. however, we bear in mind
that Jacobsens observations were instituted at the latter
end of summer, and the majority with samples of water
obtained from such trifling depths that the annual variation
in the temperature of air and water probably exerted
some influence, this will not be difficult to account for.
by reason of the heat stored in the water during the
summer months, whereas the amount of nitrogen must be
regulated by a temperature at least as low as the mean
annual temperature.
That similar phenomena were not observed in the upper
strata of the water throughout the tract of ocean investigated
on the Norwegian North-Atlantic Expedition, arises simply
from the tact, that the temperature of the air in those
regions does not even in summer exceed that of the water
at the surface, nay the reverse is rather the case.
1 Den for Intervallet fra 0 til 15° udledede Formel er her
forudsat at gjælde ogsaa fra 15 til 20°.
1 Hie formula deduced fen- the interval from 0° to 1.")° is here
assumed to be correct for that extending from I .">" to 20°.
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