| 摘 要： | The China R/V Xuelong went on the first Arctic scientific cruise, and we obtained 271 hydro-chemical samples from 22 deep-sea stations in the Bering Basin in late July, 1999. Here we describe vertical properties of silicate Si] , dissolved inorganic nitrogen DIN] or N] (nitrate plus ammonium plus nitrite) , phosphate P] and oxygen O2 ] in seawater under potential temperature-salinity structure. The seasonal stratification in the summer and the water exchanges of the North Pacific Ocean over the Bering Basin resulted in that the four layers of vertical structure with two thermoclines may be found. Vertical Si] and N] and P] profiles show that the nutrients are consumed mainly in ≤50 m and the order of deficient nutrients is Si] the first, N] the second and P] the third. The N] and P] increase with depth downward to about 500 m and then both decrease, but the Si] increases from 150 m to 2000 m or the bottom. In ≥ 150 m the O2 ] decreases, which is related with both P] and N] increasin
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