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Seasonal Variations of Alkalinity in the Western Part of the Bering Sea

机译：白令海西部地区碱度的季节性变化

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摘要

During the summer season of 1993, the distribution of total alkalinity (TA) in the depth range of 0-1200 m over a test area in the western part of the Bering Sea was studied. The alkalinity variations in the surface water mass of the summer-time modification (SWMSM) and in the cold intermediate layer (CIL) are considered in detail. The SWMSM is shown to be characterized by a CaCO_3 loss of approx 0.07 mol/m~2 over the period from the SWMSM formation. Plausible reasons for the process mentioned-bioassimilation of carbonates by phytoplankton and participation of the waters produced by ice melting-are considered. The growth of TA caused by carbonate dissolution is evaluated for the warm intermediate layer (WIL) and deep water mass (DWM). The alkalinity flux into the surface water masses due to the exchange at the CIL-WIL boundary is estimated, paraticularly, the flux caused by CaCO_3 dissolved in the deep waters. This flux is shown to exceed the CaCO_3 loss in the SWMSM; therefore, in the area under study, the resultant process is a certain enrichment of the surface waters in carbonates.
机译：在1993年的夏季，研究了白令海西部一个试验区在0-1200 m深度范围内的总碱度（TA）的分布。详细考虑了夏季改造（SWMSM）的地表水质量和冷中间层（CIL）的碱度变化。结果表明，SWMSM的特征是在从SWMSM形成的整个过程中，CaCO_3的损失约为0.07 mol / m〜2。考虑了上述过程的合理原因-浮游植物对碳酸盐的生物同化作用以及冰融化产生的水的参与。对于温暖的中间层（WIL）和深水质量（DWM），评估了由碳酸盐溶解引起的TA的生长。估计由于在CIL-WIL边界处的交换而流入地表水团的碱度通量，尤其是由溶解在深水中的CaCO_3引起的通量。已显示该通量超过了SWMSM中的CaCO_3损失。因此，在研究区域中，合成过程是碳酸盐岩中地表水的一定富集。

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