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We must expect, that the united water-masses of the rivers
Obi and Yenisei by their outflow into the sea must give rise
to a whole system of »reaction-currents» of salt water from
the sides and from below. The question naturally arises,
whether there is to be found any influx of cold arctic
seawater in the bed of the Yenisei river, similar to that observed
by Ekman in the Gota-Elf at Gothenburg.
A deep-sounding, made the 24th August, 1876, in the Yenisei
river at Korepovskoi, has settled this question.
Depth in metres. Spec, weight at C.1 Salt1 in p. C.
+ 10”
0 l.oooi O.oi
3.56 1.0001 0.01
7.12 1.0001 0.01
10.68 1.0001 0.01
16.02 not salter than the above samples.
If we may judge from this example, the entrance of an
under-current of arctic water into the Yenisei seems to be
cut off by the shallowness of the water at its embouchure.
Instead, we have positive proofs of the existence of
side-currents, caused by the influence of the flowing river-water
from the Obi and Yenisei upon the adjacent ocean-water. In
the section I on plate 24 is represented the constitution of
the Kara Sea along the course of the Vega according to the
deep-soundings registered in the journal from the 1st August,
the day of departure from the Yugor Schar, until the 4th Aug.
at 8 o’clock a. m., when she rounded the north-western point
of the Beli-Ostrow island. The observations from the 2nd
Aug. 8 p. m. to the 3rd Aug. 8 p. m. are of special interest as
showing, that a stream of fresh and warm river-water emerges
from the Malygin strait, ploughing a furrow in the
surrounding deeper strata of sea-water, which is surged up on both
sides as banks of cold and salt water — doubtlessly by the
sidewise reaction of the flowing warm water upon the adjacent
layers. By its influence the cold and salt water [temperature
— 2° or —Io.8, saltness == 3.44 p. C], which originally belongs
to a far deeper stratum of the sea,, as we may see from the
foregoing deep-soundings in the section, is lifted nearer to the
surface to a level, which water of this kind never reaches
any where else in the whole Kara Sea. The natural conse-
1 The determinations of the sp. w. and saltness are made by F. L.
Ekman.
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