NOAA Center for Satellite Applications and Research, College Park, 5830 University Research Court, College Park, MD 20740, USA; Global Science & Technology Inc., 7501 Greenway Center Drive #1100, Greenbelt, MD 20770, USA.
NOAA Center for Satellite Applications and Research, College Park, 5830 University Research Court, College Park, MD 20740, USA.
Mar Pollut Bull. 2024 Oct;207:116888. doi: 10.1016/j.marpolbul.2024.116888. Epub 2024 Sep 6.
Using satellite remote sensing, we show the distribution, dominant type, and amounts of marine debris off the northeast coast of Japan after the Great East Japan Earthquake on 11 March 2011 and subsequent tsunami. Extensive marine debris was found on March 12, with the maximal amount found on March 13. The debris was found to be mainly wood (possibly lumber wood), with an estimated 1.5 million metric tons in an elongated water area of 6800 km (18 km E-W and 380 km N-S) near parallel to the coast between 36.75°N and 40.25°N. The amount decreased rapidly with time, with scattered debris patches captured in high-resolution satellite images up to April 6. These results provide new insights on the initial distribution of the Japanese Tsunami Marine Debris, which may be used to help find bottom deposition of debris and help refine numerical models to predict the debris trajectory and fate. SYNOPSIS: Marine debris induced by the 2011 Great East Japan Earthquake and Tsunami is found to be mainly composed of wood and possibly lumber wood from constructions, with maximum amount on 13 March 2011 distributed within a narrow band of ∼18 km near parallel to the northeast coast of Japan between 36.75°N and 40.25°N.
利用卫星遥感，我们展示了 2011 年 3 月 11 日日本东北海岸发生大地震和随后海啸后的海洋垃圾的分布、主要类型和数量。3 月 12 日发现了大量的海洋垃圾，3 月 13 日发现的垃圾最多。这些垃圾主要是木材（可能是木材），在靠近海岸的狭长水区（36.75°N 和 40.25°N 之间，18km 东西向，380km 南北向）发现了估计有 150 万公吨的垃圾。随着时间的推移，垃圾的数量迅速减少，直到 4 月 6 日，高分辨率卫星图像中仍捕捉到了分散的垃圾碎片。这些结果提供了对日本海啸海洋垃圾初始分布的新认识，这可能有助于找到垃圾的底部沉积，并帮助改进数值模型来预测垃圾的轨迹和命运。概要：2011 年日本东北大地震和海啸引发的海洋垃圾主要由木材组成，可能来自建筑物中的木材，2011 年 3 月 13 日，在靠近日本东北海岸 36.75°N 和 40.25°N 之间的狭长区域（18km 东西向，380km 南北向）发现了数量最多的垃圾。
