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首页> 外文会议>Remote Sensing of the Marine Environment; Proceedings of SPIE-The International Society for Optical Engineering; vol.6406 >Biological impact of Hurricane Ignacio (2003) in the Eastern Pacific Ocean as observed through MODIS data
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Biological impact of Hurricane Ignacio (2003) in the Eastern Pacific Ocean as observed through MODIS data

机译：通过MODIS数据观测到的伊格纳西奥飓风（2003）对东太平洋的生物影响

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Strong winds associated with hurricanes generate upwelling of cold water and transfer nutrients to the sea surface, supporting the development of significant phytoplankton blooms. Here we study the effect of the passage of hurricanes on the fields of sea surface temperature and chlorophyll-a in the pelagic ocean. A case-study is given for Hurricane Ignacio, the first storm of the 2003 season in the Eastern Tropical Pacific Ocean, on the south-eastern waters of Baja California Peninsula. The net reduction of in situ water temperature was -10℃ and the phytoplankton pigment increase was 10 fold. Detailed features of the distribution of both characteristics of the sea surface are evident in the synoptic satellite imagery (MODIS/Aqua), with extreme thermal changes of -6℃ and increases up to 25 fold in chlorophyll-a. The satellite-derived averaged changes computed in the area of impact (～45,000 km~2) show temperature reduction of -1.3℃ and 1.5 fold increase of phytoplankton biomass. The physical and biological features studied for Hurricane Ignacio are crucial for understanding the ecosystem function around the southern Baja California peninsula, a region with strong dynamics in the carbon cycle. The study demonstrates how hurricanes induce phytoplankton blooms, a critical resource in the food chain, in particular for the pelagic fisheries. Systematic use of satellite remote-sensing may be advantageous to quantify at short, middle and long term, the impact of hurricanes on ocean biology at spatial and temporal scales of local and regional interest.
机译：与飓风相关的强风会产生冷水上升，并将养分转移到海面，从而支持浮游植物的大量开花。在这里，我们研究了飓风通过对中上层海洋表面温度和叶绿素-a场的影响。在下加利福尼亚半岛的东南水域，对热带飓风伊格纳西奥进行了案例研究，这是2003季的东部热带太平洋地区的第一场风暴。原位水温的净降低为-10℃，浮游植物色素的增加为10倍。在天气卫星图像（MODIS / Aqua）中，海表这两个特征的分布的详细特征显而易见，极端的热变化为-6℃，而叶绿素a的变化高达25倍。在影响范围（〜45,000 km〜2）中计算得出的卫星平均变化表明，温度降低了-1.3℃，浮游植物生物量增加了1.5倍。研究伊格纳西奥飓风的物理和生物学特征对于了解南下加利福尼亚半岛周围的生态系统功能至关重要，而南下加利福尼亚半岛是一个碳循环活跃的地区。这项研究证明了飓风是如何引起浮游植物开花的，浮游植物的开花是食物链中的重要资源，特别是对于远洋渔业。卫星遥感的系统使用可能有利于短期，中期和长期量化飓风对当地和区域关注的时空尺度对海洋生物学的影响。

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