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We found N₂O enrichment of up to 157% saturation in continental shelf water columns in the Bering and Chukchi Seas at water depths less than 66m. The N₂O enrichment exhibited a linear relationship with N* depletion. We also observed that the stable isotopic characteristics of N₂O are an enrichment of ¹⁸O and a depletion of ¹⁵N relative to atmospheric N₂O. We conclude that N₂O in the area is primarily produced through denitrification in sediments. By using the observed instantaneous N₂O emission rate, we estimated the annual emission rate from the surface to the atmosphere in the area to be 0.097±0.065Tg N year⁻¹, which corresponds to 0.6% to 10% of the total oceanic emission. The area of the Bering and Chukchi Seas could be very important in understanding global oceanic N₂O emission.