A HYCOM modeling study of the Persian Gulf: 2. Formation and export of Persian Gulf Water
A HYCOM modeling study of the Persian Gulf: 2. Formation and export of Persian Gulf Water
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波斯湾的 HYCOM 模型研究：2. 波斯湾水域的形成和输出
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
W. Johns
中科院分区：
文献类型：
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作者：
F. Yao;W. Johns
[1]利用混合坐标海洋模式（HYCOM）研究了波斯湾环流和水团转化过程以及通过霍尔木兹海峡与印度洋的水交换。模拟结果表明，由于海湾北方端和南部浅滩的淡水流失，入侵的印度洋表层水（IOSW）转化为盐度>41实用盐度单位的高盐度沃茨。在冬季，从海洋到空气的强烈热量损失导致在北方海湾和南部海湾形成寒冷和盐水沃茨。在南部海湾形成的密集沃茨具有较高的盐度，并在冬季作为零星的底部流出物溢出到海湾的轴向深槽中，这导致了所观察到的海峡中的高盐度脉冲，而在夏季，由于加热，它们的浮力增加，它们作为温暖但含盐的中间深度流通过海峡输出。形成于北方海湾的密集沃茨，常年沿沿着轴向槽向海峡传播。相应地，季节翻转环流在密度级上有两支：北方分支在8月达到峰值，强度为0.13 Sv;南方分支在2月和12月达到峰值，强度为0.08 Sv。这两个分支流出一起饲料季节性变化的深流出通过海峡的年平均体积运输0.12 Sv。
[1] The circulation and water mass transformation processes in the Persian Gulf and the water exchange with the Indian Ocean through the Strait of Hormuz are studied using the Hybrid Coordinate Ocean Model (HYCOM). Model results suggest that intruding Indian Ocean Surface Water (IOSW) is transformed into hypersaline waters with salinity >41 practical salinity unit by the fresh water loss in the northern end of the gulf and in the southern shallow banks. During wintertime, intense heat loss from sea to air leads to the formation of cold and saline waters both in the northern gulf and in the southern gulf. Dense waters formed in the southern gulf have higher salinity and spill into the axial deep trough of the gulf as a sporadic bottom outflow in winter, which leads to high-salinity pulses in the strait as observed, whereas in summer their buoyancy is increased due to heating and they are exported as a warm yet salty intermediate depth flow through the strait. Dense waters formed in the northern gulf propagate toward the strait along the axial trough throughout the year. Correspondingly, there are two branches of seasonal overturning circulation in density classes: the northern branch peaking in August with strength of 0.13 Sv and the southern branch peaking in February and December with strength of 0.08 Sv. These two branches outflow together feed a seasonally varying deep outflow through the strait with an annual mean volume transport of 0.12 Sv.