The structure of the suspended matter in the subsurface 

 layer had maximum development, as it surfaced, at Stations 34, 

 55, 56 (possibly 62), and 70. At Stations 55 and 70, the sea was 

 a brown color. The optical structure that is observed here is 

 typical of local divergence zones; most possibly, it is associated 

 with the cyclonic nature of water circulation in this region of 

 exploration (Sukhovey, 1986). 



The integral and angular characteristics of assays, taken 

 from subsurface maximum, corresponded to diatom particulates 

 and were close to the totality of integral characteristics of light 

 scattering in productive water at Station 34 in the Gulf of 

 Anadyr. The spreading of productive water can be assessed by 

 "fitting" totality ( 14) to integral characteristics of light scattering 

 in all other assays from the Chukchi Sea, thus assessing the 

 areas of productive water spreading. For instance, at Station 

 53, such water could be traced throughout all depths from 

 surface to bottom. Isoline 1 .0. in the eastern part of section 8, 

 points to a generic relationship between Stations 53 and 55. It 

 is not improbable that here, in the same zone of water upflow, 

 some water flows down the sides. 



Bottom waters in the Chukchi Sea are very turbid 

 (e > 1 m '). At all stations, where assays were taken from 

 surface and bottom horizons, the highest volumetric contents 

 of coarse and fine particulates, as assessed from (11) and (12), 

 were found at the bottom. Here the integral characteristics of 

 indicatrices had, on the average, relative content of this 

 particulates equal to 1 6-1 7%; at Station 55, this parameter rose 

 up to 23%. 



An exception was Station 57 where assays, taken from 

 39 m horizon, gave light-scattering integral characteristics that 

 corresponded to those of productive water. It is certainly of 

 interest that here, as at Station 53, a possible generic relationship 

 between bottom water and productive water of higher layers 

 can be deduced from isolines 0.7-1.0. 



Figure 15 shows vertical structure of water transmittance 

 as depicted in the Bering Strait section (this section is the 

 closest one by time: 16.08.88). It is evident that most cloudy 

 waters were spreading along western and eastern coasts of the 

 left strait and also along the eastern coast of the right arm. 

 Qualitatively, however, the composition of particulates differed. 

 In the turbid water along eastern coast of the right arm (the 

 intensity of turbidity is depicted by shading of various 

 denseness), the relative content of fine particulates was high 

 (30%); by their light scattering integral characteristics these 

 waters corresponded to earlier examined waters ( sections 3, 4, 

 5, 6). The coarse and fine fractions here also had rather high 

 concentrations. Turbid waters in the left strait ( shown by dense 

 shading) had integral characteristics that related these waters to 

 the productive ones; relatively clear water spread in the upper 

 layer of right strait into the west. By its integral characteristics, 

 this water corresponded to water with diatom particulates. In 

 the central parts of both arms, in mid-depths, clear water cores 

 (designated as I and 11) were present; these cores differed from 

 the surrounding waters by integral characteristics and 

 transmittance. 



Fig. 14. Secliun 10. (Slation.s 71-66) Vertical struclure of Iransmiltance. 



148 



