字幕列表 影片播放 列印英文字幕 Monterey canyon is really one of the the great submarine canyons of the world. It runs out over 470 kilometers meandering all the way out into the deep abyss. If you drained the Monterey canyon it would look very similar to the Grand Canyon with meandering channel with high steep walls and sand deposits in the middle of the channel. We know the surface of other planets better than we know the surface of the earth in the deep ocean. And for the most part it's true because it's so much harder. The ocean is in the way. I think this animation allows the public to get a sense of the grand scale of Monterey canyon and to start to see and appreciate this massive feature that's right in our backyard. Every time we go out we're mapping something that that hasn't been mapped before we're seeing things that haven't been seen before. We're exploring. We get to explore. We want to understand how Monterey canyon formed. If when and how it's changing over time and the maps are the first step to beginning understanding those processes. We map at a meter scale or meter resolution. We fly the AUVs at a 50 meter altitude and we're using this multi-beam sonar that pings three times a second and every time it pings it gets a set of soundings a set of depth measurements. Every one of those soundings has a footprint that's just about a meter across and that's why we say it's it's meter scale mapping, if we have a feature that's about a meter in size we will actually see it in our map. So when we can map the sea floor at this one meter resolution we can start to see and understand faults, unique biological habitat, we can start to begin to understand what processes are occurring in the canyons and how sediment is being transported across our globe. With this fly through you're seeing the data from the AUVs, you come here and we'll just stop it right there and you see those those bands there this is a glacier of sand that actually moves really fast and really suddenly and then stops and leaves behind these these features. Submarine canyons like Monterey canyon form the the most important conduits of material from the continents to the abyss. Moving material from land to the abyss you're moving carbon all around the world it's a huge part of the carbon cycle. And so here we have an opportunity to study these active processes, but they're globally important they're not just important here in coastal California.