Holbrook W Steven, Páramo Pedro, Pearse Scott, Schmitt Raymond W
Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, USA.
Science. 2003 Aug 8;301(5634):821-4. doi: 10.1126/science.1085116.
We present acoustic images of oceanic thermohaline structure created from marine seismic reflection profiles across the major oceanographic front between the Labrador Current and the North Atlantic Current. The images show that distinct water masses can be mapped, and their internal structure imaged, using low-frequency acoustic reflections from sound speed contrasts at interfaces across which temperature changes. The warm/cold front is characterized by east-dipping reflections generated by thermohaline intrusions in the uppermost 1000 meters of the ocean. Our results imply that marine seismic reflection techniques can provide excellent spatial resolution of important oceanic phenomena, including thermohaline intrusions, internal waves, and eddies.
我们展示了利用横跨拉布拉多洋流和北大西洋洋流之间主要海洋学锋面的海洋地震反射剖面创建的海洋热盐结构声学图像。这些图像表明，利用温度变化界面处声速差异产生的低频声学反射，可以绘制出不同的水体，并对其内部结构进行成像。暖/冷锋面的特征是在海洋最上层1000米处由热盐入侵产生的向东倾斜的反射。我们的结果表明，海洋地震反射技术可以为包括热盐入侵、内波和涡流在内的重要海洋现象提供出色的空间分辨率。
