U.S. Geological Survey, National Wetlands Research Center, Lafayette, LA, United States.
Department of Environmental Sciences, Louisiana State University, LA, United States.
Mar Pollut Bull. 2014 Dec 15;89(1-2):85-95. doi: 10.1016/j.marpolbul.2014.10.032. Epub 2014 Oct 30.
Polarimetric synthetic aperture radar (PolSAR) data exhibited dramatic, spatially extensive changes from June 2009 to June 2010 in Barataria Bay, Louisiana. To determine whether these changes were associated with the Deepwater Horizon (DWH) oil spill, twenty-nine sediment samples were collected in 2011 from shoreline and nearshore-interior coastal marsh locations where oil was not observed visually or with optical sensors during the spill. Oil source-fingerprinting and polytopic vector analysis were used to link DWH oil to PolSAR changes. Our results prove that DWH oil extended beyond shorelines and confirm the association between presence of DWH oil and PolSAR change. These results show that the DWH oil spill probably affected much more of the southeastern Louisiana marshland than originally concluded from ground and aerial surveys and verify that PolSAR is a powerful tool for tracking oil intrusion into marshes with high probability even where contamination is not visible from above the canopy.
2009 年 6 月至 2010 年 6 月期间，路易斯安那州巴拉塔里亚湾的偏振合成孔径雷达（PolSAR）数据发生了显著的、大范围的空间变化。为了确定这些变化是否与深海地平线（DWH）溢油事件有关，2011 年从海岸线和近岸内陆沿海沼泽地区采集了 29 个沉积物样本，这些地区在溢油期间没有用光学传感器或肉眼观察到石油。油源指纹分析和多拓扑向量分析被用来将 DWH 油与 PolSAR 变化联系起来。我们的研究结果证明 DWH 油已经扩散到了海岸线之外，并证实了 DWH 油与 PolSAR 变化之间的关联。这些结果表明，DWH 溢油事件可能对路易斯安那州东南部的沼泽地造成的影响比最初从地面和空中调查得出的结论要大得多，并验证了 PolSAR 是一种强大的工具，即使在树冠上方无法看到污染的情况下，也能以很高的概率跟踪石油侵入沼泽地。
