VEGÄ-EXPEDITIONENS VETENSKAPLIGA AliLETEN. 330 



We must expect, that tlie unitcd water-masses of the rivers 

 Obi and Yenisei by their outfiow into thc sca must give riso 

 to a whole system of »reaction-currcnts;» of salt water from 

 thc sidos and from below. The question naturally arises, 

 whether thero is to be found any influx of cold aretic sea- 

 water in tho bed of the Yenisei river, similar to that observed 

 by Ekman in the Göta-Elf at Gothcnburg. 



A deep-sounding, made the 24"^ August, 1870, in tho Yenisei 

 river at Korepovskoi, has settled this question. 



c. 1 Salti in p. C. 



0.01 

 0.01 

 0.01 



0.01 

 not salter than the abovc samples. 



If wc may judgc from this example, the entrance of an 

 under-currcnt of aretic water into the Yenisei seems to be 

 cut off by thc shallowness of the water at its embouchure. 



Instead, we have positive proofs of the existence of side- 

 currenls, caused by thc inliuenec of the flowing river-water 

 from the Obi and Yenisei upoii the adjacent ocean-water. In 

 the section I on platc 24 is rcpresentcd thc constitution of 

 the Kära Sca along the course of the Vega according to thc 

 deep-soundings registered in thc journal from the 1*"^ August, 

 thc day of dcparture from the Yugor Schar, until the 4"' Aug. 

 at 8 o'clock a. m., when slic roundcd the north-western point 

 of thc Beli-Ostrow island. The observations from thc 2"'' 

 Aug. 8 p. m. to the 3*''^ 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 surround- 

 ing deeper strata of sea- water, which is surged up on both 

 sides as banks of cold and salt water — doubtlessly by the 

 sidewisc rcaction of the flowing warm water upon the adjacent 

 laycrs. By its influence the cold and salt water [temperature 

 — 2" or — 1°.8, saltness = 3.44 p. C], which originally belongs 

 to a far deeper stratum of the sea,. as we may see from the 

 foregoing dcep-soundings in tho section, is liftcd nearer to the 

 surface to a level, which water of this kind never reaches 

 any where else in the whole Kära Sca. The natural conse- 



* The (Icterminations of the sp. w. and saltness are made hy F. L 

 Ekman. 



