Storminess and sea-level can both have a significant impact on landforms in cyclone-prone coastal regions, although much of our understanding comes from short-timescale modern observations. This study aims to understand the variability of sediment transport and deposition in the Choctawhatchee Bay/Santa Rosa Island in the northern Gulf of Mexico, establishing the dominant sediment transport processes and morphological response of the barrier system to long-term variations in storminess and rising sea-levels.

Here, we study the spatial and temporal changes in physicochemical properties of the sedimentary record of Choctawhatchee Bay to examine the character and fidelity of records of storm impacts spanning the Holocene. Proxies for marine and terrestrial conditions in the cores situated closer to the present barrier (proximal) show that sedimentation in coastal areas and marine influence of the bay during the last ~8000 yrs. were mainly determined by barrier response to the Holocene transgression and changes in storminess. In contrast, sedimentation close to the landward shore was governed by terrigenous input. The correlation of grain size and terrigenous proxies with regional hurricane records indicates that hinterland erosion by the rainfall during hurricane events is likely the dominant terrigenous sediment transport mechanism in areas close to the landward shore of the bay. These results suggest that sediment archives in large coastal deposition environments are equally suitable for sea level and cyclone modulated coastal morphological studies and paleo tropical cyclone studies, depending on the location, selected with an understanding of sedimentation processes in the vicinity.

暴风雨和海平面都可能对容易遭受飓风袭击的沿海地区的地貌产生重大影响，尽管我们的大部分理解来自短期的现代观测。这项研究旨在了解墨西哥湾北部Choctawhatchee湾/圣罗莎岛的沉积物输运和沉积变化，确定主要的输沙过程和屏障系统对暴风雨和海平面上升的长期变化的形态响应级别。

在这里，我们研究Choctawhatchee湾的沉积记录的理化特性的时空变化，以检验跨越全新世的风暴影响记录的特征和保真度。靠近当前屏障（近端）的岩心中海洋和陆地条件的代理（近端）表明，在过去约8000年期间，沿海地区的沉积和海湾的海洋影响。主要取决于对全新世侵袭的屏障反应和暴风雨的变化。相反，靠近陆岸的沉积是由陆源输入控制的。颗粒大小和陆源代理与区域飓风记录的相关性表明，飓风事件期间降雨对腹地的侵蚀可能是该海湾陆上海岸附近地区陆源沉积物的主要运移机制。这些结果表明，在大型沿海沉积环境中的沉积物档案库同样适用于海平面和旋风调制的海岸形态研究以及古热带旋风研究，具体取决于所处的位置，这些位置是在了解附近沉积过程的基础上选择的。