Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane

Journal of Marine Science and Engineering

Chunyan Li¹  Wei Huang² 

[1] Department of Oceanography and Coastal Sciences, School of Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, USA;Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA;

关键词: cold front;    Hurricane Barry;    numerical simulation;    subtidal hydrodynamics;    multi-inlet;    volume flux;   

DOI  :  10.3390/jmse8120979

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown