Prior studies have shown that above-normal sea surface temperatures (SSTs) enhance snowfall over Korea. Here, we show that heavy snow is nonetheless associated with below-normal East Sea SSTs, and we investigate the dynamical response of the atmosphere to this surface condition using observations and numerical modeling. The results indicate that anomalous southeasterly/easterly winds are induced by the heavy snowfall-related cold SST anomalies, and consequently, the moisture flux is converged. The existence of the southeasterly winds and the accompanied moisture flux convergence appear to be instrumental in producing the heavy snowfall events. The anomalous southeasterly/easterly winds associated with the heavy snowfall-related cold SST anomaly reduce the climatological northwesterly/westerly winds, leading to relatively warm and wet conditions over the east coast of Korea that are favorable for forming and intensifying snowfall events in the region.

中文翻译：

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大气环流对韩国东部与大雪相关的低于正常东海海温的动力响应

先前的研究表明，高于正常水平的海面温度 (SST) 会增加韩国的降雪量。在这里，我们表明大雪仍然与低于正常的东海 SST 相关，并且我们使用观测和数值模拟研究了大气对这种表面条件的动态响应。结果表明，与大雪有关的冷海温异常诱发了异常东南风/东风，从而使水分通量收敛。东南风的存在和伴随的湿气通量汇聚似乎有助于产生大雪事件。与大雪相关的冷海温异常相关的异常东南风/东风降低了气候学的西北风/西风，