Widespread Deposition in a Coastal Bay Following Three Major 2017 Hurricanes (Irma, Jose, and Maria)
Widespread Deposition in a Coastal Bay Following Three Major 2017 Hurricanes (Irma, Jose, and Maria)
复制标题
DOI：
10.1038/s41598-019-43062-4
复制
发表时间：
2019-05-08
影响因子：
4.6
通讯作者：
Canals-Silander, Miguel
中科院分区：
文献类型：
--
作者：
Browning, Trevor N.;Sawyer, Derek E.;Canals-Silander, Miguel
2017年，三场主要飓风（厄玛、何塞和玛丽亚）在两周内袭击了加勒比海东北部。飓风波可能对沿海生态系统造成物理破坏，重新悬浮和运输先前的海底沉积物，而相关的强降雨可能导致大量陆源沉积物流入海岸（例如，掩埋生态系统）。为了了解沉积来源（陆地或海洋）以及飓风引起的变化，我们于2017年8月（风暴前）收集了美属维尔京群岛圣约翰珊瑚湾的水深测量和沉积物样本，并于2017年11月（风暴后）重复了这一调查。比较揭示了海底形态的变化和广泛的沉积，在1.28公里(2)的底栖区平均沉积了25厘米的沉积物。尽管两次调查之间的年降水量不同，但泥沙产量模型表明，流域也有贡献
In 2017, three major hurricanes (Irma, Jose, and Maria) impacted the Northeastern Caribbean within a 2-week span. Hurricane waves can cause physical damage to coastal ecosystems, re-suspend and transport antecedent seafloor sediment, while the associated intense rainfall can yield large influxes of land-derived sediment to the coast (e.g. burial of ecosystems). To understand sedimentation provenance (terrestrial or marine) and changes induced by the hurricanes, we collected bathymetry surveys and sediment samples of Coral Bay, St. John, US Virgin Islands in August 2017, (pre-storms) and repeated it in November 2017 (post-storms). Comparison reveals morphologic seafloor changes and widespread aggradation with an average of similar to 25 cm of sediment deposited over a 1.28 km(2) benthic zone. Despite an annual amount of precipitation between surveys, sediment yield modeling suggests watersheds contributed