孙永才, 林丽娜, 魏泽勋, 等, xxxx. 2019年夏季楚科奇海混合层特征分析[J]. 海洋科学进展, x(x): xx-xx. doi: 10.12362/j.issn.1671-6647.20231017001.
引用本文: 孙永才, 林丽娜, 魏泽勋, 等, xxxx. 2019年夏季楚科奇海混合层特征分析[J]. 海洋科学进展, x(x): xx-xx. doi: 10.12362/j.issn.1671-6647.20231017001.
SUN Y C, LIN L N, WEI Z X, et al, xxxx. Characterization of mixed layers in the Chukchi Sea in summer 2019[J]. Advances in Marine Science, x(x): xx-xx. DOI: 10.12362/j.issn.1671-6647.20231017001
Citation: SUN Y C, LIN L N, WEI Z X, et al, xxxx. Characterization of mixed layers in the Chukchi Sea in summer 2019[J]. Advances in Marine Science, x(x): xx-xx. DOI: 10.12362/j.issn.1671-6647.20231017001

2019年夏季楚科奇海混合层特征分析

Characterization of Mixed Layers in the Chukchi Sea in Summer 2019

  • 摘要: 为探究2019年夏季楚科奇海混合层的形成机制,采用多源高分辨率CTD数据,利用固定阈值法确定混合层深度(Mixed Layer Depth, MLD),并通过相关性分析和多元线性回归研究影响MLD的主要因素。研究表明,在该区域,采用0.1 \textkg/\textm^\text3 的阈值标准能更准确地估算MLD。从层化指数来看,盐度在楚科奇海的密度形成中占主导地位,对MLD的影响较大。本研究还发现,在3个海区风、动量通量和浮力通量对MLD影响的比较中,楚科奇海北部海区混合层深度分别受风和动量通量的影响最显著,而南部地海区混合层深度受浮力通量的影响最显著。此外,在3个海区中北部海区动量通量和浮力通量的协同作用对MLD的贡献率最大。在不同区域,层化和风对MLD的影响程度不同,在楚科奇海北部,风对MLD的影响远大于层化,贡献率分别为38%和9%。除楚科奇海北部外的2个区域,风和层化对MLD的贡献几乎相等。

     

    Abstract: This study investigates the formation mechanism of the mixed layer in the Chukchi Sea in summer of 2019, utilizing multi-source high-resolution CTD data. The mixed layer depth (MLD) is determined using a fixed threshold method with a threshold criterion of 0.1 \mathrmk\mathrmg/\mathrmm^3 , and the main factors influencing the MLD are studied with correlation analysis and multiple linear regression. The results indicate that the 0.1 \mathrmk\mathrmg/\mathrmm^3 threshold criterion provides a more accurate estimation of the MLD in the region. Salinity predominates in density formation in the Chukchi Sea, exerting a significant influence on the MLD. Furthermore, by comparing the impacts of wind, momentum flux, and buoyancy flux on MLD in three areas, we found that in northern Chukchi Sea, the MLD is predominantly influenced by wind and momentum flux, whereas in southern region, buoyancy flux has the most significant impact on the MLD. Additionally, in northern Chukchi Sea, the synergistic effect of momentum flux and buoyancy flux contributes the most to the MLD. The influence of stratification and wind on the MLD varies across different regions. In northern Chukchi Sea, wind has much greater impact on the MLD than stratification, contributing 38% and 9%, respectively. In the other two regions outside northern Chukchi Sea, wind and stratification contribute almost equally to the MLD.

     

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