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１９９３年６～８月，“北斗”号渔业资源调查船在白令海阿留申海盆区进行了狭鳕资源声学调查及渔场环境调查。应用本航次调查资料，本文阐述了调查海区温度、盐度及溶解氧分布特征，并分析了狭鳕分布和移动与理化环境的关系。结果表明：（１）阿留申海盆区为大面积低温水所覆盖，水温在１０℃以下。温盐水平分布特征为公海区低温高盐，调查区的其余水域则为高温低盐。溶解氧水平分布比较均匀，表层溶氧含量在１０ｍｇ／Ｌ左右；（２）温跃层位于２５米和５０米之间，一强冷水团控制着１００米到２００米左右的水层，其水温在３℃以下。盐度随深度增加而增加，溶解氧随深度的增加而降低；（３）狭鳕当年生幼鱼主要分布在海盆水系和东大陆架水系的混合区内，１００米层幼鱼密集区水温在３～５℃，盐度在３２．９～３３．１，溶解氧在８～９ｍｇ／Ｌ；（４）夏季狭鳕成鱼主要在冷水团范围以内垂直移动，２００米层成鱼密集区水温为３～４℃，盐度为３３．２～３３．６，溶解氧为６～８ｍｇ／Ｌ。
From June to August 1993, the “Beidou” Fishery Resources Survey Vessel conducted poll survey and fishery environment survey in the Aleutian Basin in the Bering Sea. Using this voyage survey data, this paper describes the investigation of sea temperature, salinity and dissolved oxygen distribution characteristics, and analyzes the relationship between the distribution and movement of pollock and the physical and chemical environment. The results show that: (1) The Aleutian Basin is covered by a large area of low temperature water with the water temperature below 10 ℃. The distribution of temperature and salinity level is characterized by low temperature and high salt in the high seas, while the remaining waters in the survey area are high temperature and low salt. Dissolved oxygen level distribution is more uniform, surface dissolved oxygen content of about 10mg / L; (2) thermocline is located between 25 meters and 50 meters, a strong cold water mass control of 100 meters to 200 meters of the water layer, the water temperature Below 3 ℃. Salinity increased with depth, dissolved oxygen decreased with increasing depth; (3) Pollocked juveniles were mainly distributed in the mixing area of the basin water system and the East China Sea shelf system. The water temperature in the 100-meter-long larvae dense area was between 3 ~ 5 ℃, salinity of 32.9 ~ 33.1, dissolved oxygen in the 8 ~ 9mg / L; (4) summer pollock adult fish mainly within the cold water within the scope of the vertical movement, 3 ~ 4 ℃, salinity 33.2 ~ 33.6, dissolved oxygen 6 ~ 8mg / L.