Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
The influence of the Yenisei river announces itself still
more clearly by the diminishing saltness of the water. On
both sides of the Sibiriakoff island the saltness was found
to be only O.49 p. c. while the sea-water a few miles further
to the west, which consists of the outflow from the Gulf of
Obi, contains three times as much. In accordance with this
fact we find, that also in the North, at 74.30 Lat., the saltness
increases and the temperature diminishes the more we
approach the west side of the Kara Sea and vice versa. See
section XI, which is based upon the observations from 1875
together with those from 1878. The fresh and warm water
from the Yenisei thus surging up to the east against the
Taimur coast naturally makes the level of the sea stand
higher in summer at this shore, on account of the higher
temperature and greater spec, volume of the water. This
difference of niveau, together with the reaction from the coast
upon the flowing water, makes its uppermost layers1 take a
westerly direction towards Novava Zemlya, where its influence
is felt by the diminution of the saltness - and the melting of
the ice-floes, formed during winter in this part of the sea.
The melting of the ice, which requires an incessant supply
of warm water, can not however be completed before late in
the summer, in August or September, when the current from
the river system of the Obi and Yenisei has had due time to
develop its full vigor and direct all the resources of solar
heat stored up in its waters to a successfull attack upon the
ice of the western basin of the Kara Sea. Until then the warm
water current, instead of clearing the sea from ice and
opening navigable water, will have the contrary effect, viz. to
barricade the eastern entrance to the Matochkin Schar by
pressing the rest of the pack ice against the coast of Novaya
Zemlya.
The intensity of the surface current, just spoken of, is
sufficiently attested by the fact, that the yacht Proven,
belonging to the first Swedish expedition, in 1875, on its return
from Port Dickson, the 21th August, was driven from its course
from 74° 0’ Lat, 71° 0’ Long, to 75° 14’ Lat. 68° 45’ Long., i. e.
more than one degree northward and two degrees westward
1 The pressure of which is not, like that of the deeper ones, equilibrated
by the adjacent water strata and consequently must overflow.
2 The saltness at the surface in this part of the sea varies between
2.30 p. c. and 3.04 p. c. (see the map, plate 24).
<< prev. page << föreg. sida << >> nästa sida >> next page >>
