带缆-反带缆效应在河口盐斜形成中的作用——以日本海彼得大帝湾拉兹多尔纳亚河为例

T. R. Kilmatov, N. I. Rudykh
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摘要

以河口盐斜形成为例,考虑了不同盐度海水混合时海水密度方程的非线性效应。根据盐度的不同,混合物的密度可能高于(低盐度)或低于(高盐度)这两种成分的算术平均密度,因此在盐斜较低盐度的上部观察到混合过程中的压实效应(束带),而在盐斜较高盐度的下部观察到混合过程中的分解效应(反束带)。根据混合水的平均温度,计算了从打结到打结时的矿化度值。在真正的盐斜层(流入日本海彼得大湾的拉兹多纳亚/绥芬河河口),盐度垂直梯度最高的是等盐线,其值随温度变化。夏季河口水温在22℃左右时,最大梯度在等盐线10 psu处,冬季水温降至1℃时,最大梯度移至等盐线18 psu处。这些等盐值对应于结缆点到反结缆点的盐度值。该水位线以上的锚链效应促进了水的下沉,而该水位线以下的防锚链效应促进了水的上升。这种相遇辐合运动是盐斜在陡坡状态下自我维持的一种附加机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Action of cabbeling-anticabbeling effect in formation of the halocline in estuaries on example of the Razdolnaya River (Peter the Great Bay, Japan Sea)
Nonlinearity effect of the seawater density equation for mixing of waters with different salinity is considered for a case of the halocline formation in estuaries. Depending on salinity, density of the mixture can be higher (at low salinity) or lower (at high salinity) than the arithmetic mean density of the two components, so an effect of compaction during mixing (cabbeling) is observed in the upper part of halocline with lower salinity, whereas an effect of decompaction during mixing (anticabbeling) occurs in its lower part with higher salinity. The salinity value at the point of cabbeling change to anticabbeling is calculated that depends on average temperature of the mixed waters. In the real halocline (estuary of the Razdolnaya/Suifen River flowing into Peter the Great Bay, Japan Sea), the highest vertical gradient of salinity is observed along the isohaline, which value changes depending on temperature. In summer, when the water temperature in the estuary is about 22 oC, the maximum gradient is observed at the isohaline 10 psu, while in winter, when the temperature drops to 1 oC, the maximum gradient shifts to the isohaline 18 psu. These isohaline values correspond to the salinity values for the point of cabbeling change to anticabbeling. The cabbeling effect above this level promotes sinking of water, but the anticabbeling effect below this level promotes rising of water. This encountering convergent motion is an additional mechanism of the halocline self-sustaining in sharp state.
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