Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane
Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane
复制标题
DOI：
10.3390/jmse8120979
复制
发表时间：
2020-12
影响因子：
2.9
通讯作者：
Wei Huang;Chunyan Li
中科院分区：
文献类型：
--
作者：
Wei Huang;Chunyan Li
本文研究了2014年Barataria湾对一次大气冷锋和2019年Barry飓风的潮下响应。冷锋的影响期较短（1至3天），而飓风巴里的影响期要长得多（约1周）。在冷锋通过前后，风向通常由南象限转向北象限。对于在墨西哥湾北部海岸登陆的飓风来说，风的变化取决于相对于登陆地点的位置。因此，水位通常在冷锋风最大后达到低谷；而在飓风期间的最大风力之后，水位大多会激增，尤其是在飓风的右侧。巴里飓风引起的水位变化大约是冷锋事件引起的水位变化的3倍。两种天气类型下的水量通量也存在差异：巴里飓风期间的水量输送是冷锋期间的4倍。另一方面，冷锋事件更加频繁（每年30-40次），导致Barataria湾和沿海海洋之间的交流更加频繁。
In this paper, subtidal responses of Barataria Bay to an atmospheric cold front in 2014 and Hurricane Barry of 2019 are studied. The cold fronts had shorter influencing periods (1 to 3 days), while Hurricane Barry had a much longer influencing period (about 1 week). Wind direction usually changes from southern quadrants to northern quadrants before and after a cold front’s passage. For a hurricane making its landfall at the norther Gulf of Mexico coast, wind variation is dependent on the location relative to the location of landfall. Consequently, water level usually reaches a trough after the maximum cold front wind usually; while after the maximum wind during a hurricane, water level mostly has a surge, especially on the right-hand side of the hurricane. Water level variation induced by Hurricane Barry is about 3 times of that induced by a cold front event. Water volume flux also shows differences under these two weather types: the volume transport during Hurricane Barry was 4 times of that during a cold front. On the other hand, cold front events are much more frequent (30–40 times a year), and they lead to more frequent exchange between Barataria Bay and the coastal ocean.