Field data, a three‐dimensional hydrodynamic numerical model, and modal decomposition were used to examine the baroclinic response to wind in two interconnected multiarm lakes, Knewstubb and Natalkuz Lakes (British Columbia, Canada). Similar to lakes of simpler geometry, the first‐vertical first‐horizontal mode (V1H1) of Knewstubb and Natalkuz Lakes was found to be the most energetic mode. This V1H1 dominance is attributed to similarity between the relatively uniform distributions of along‐thalweg wind and surface‐layer flow for the V1H1 mode. Two bathymetric features, the geometric constriction between Knewstubb and Natalkuz Lakes, and changes in thalweg orientation relative to the wind field act to create subbasins in which wind forcing causes local metalimnetic tilts. These subbasin scale tilts deepen the metalimnion at the downwind ends of the subbasins, raise the metalimnion at the upwind ends, and are superimposed on the lake‐wide V1H1 tilt. The metalimnetic tilts in the subbasins are attributed to higher horizontal modes that are equivalent to V1H1 modes of the subbasins. Because the thickness of the metalimnion is significant, the subbasin metalimnetic tilts occur with variations in the metalimnetic thickness along the subbasins; the metalimnion is compressed at the downwind end and expanded at the other end of each subbasin. This variability in thickness leads to metalimnetic intrusions following the relaxation of wind forcing. The findings of this study contribute to characterizing the baroclinic response to wind in lakes of complex bathymetry. In particular, this study helps in understanding the effect of bathymetric features on modal composition of the baroclinic response.

中文翻译：

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多臂多流域水库中的风斜压响应

现场数据，三维流体力学数值模型和模态分解被用于检验两个相互连接的多臂湖泊Knewstubb和Natalkuz湖（加拿大不列颠哥伦比亚省）对风的斜压响应。与几何形状较简单的湖泊相似，发现Knewstubb和Natalkuz湖泊的第一个垂直的第一水平模式（V1H1）是最活跃的模式。V1H1的优势归因于V1H1模式的沿海风的相对均匀分布与表层流之间的相似性。两个测深特征，即Knewstubb湖与Natalkuz湖之间的几何收缩，以及相对于风场的thalweg方向变化，都产生了子盆地，在这些子盆地中，强迫风会引起局部金属动力倾斜。这些子流域尺度的倾斜使子流域的顺风端的金属离子加深，在子流域的顺风端使金属离子升高，并叠加在整个湖泊的V1H1倾斜上。子盆地中的金属电磁倾斜被归因于较高的水平模式，这些模式等同于子盆地的V1H1模式。因为金属酰亚胺的厚度很大，所以子盆地的金属磁铁倾斜会随着沿着子盆地的金属磁铁厚度的变化而发生。金属酰亚胺在顺风端被压缩，并在每个子流域的另一端膨胀。厚度的这种可变性会在强迫风放松后导致金属电磁侵入。这项研究的发现有助于表征复杂测深湖泊中的斜压对风的响应。尤其是，