: How scientists plan to build a detailed seafloor map by 2030 #IndiaNEWS Marine scientists often feel like they are fumbling in the dark. The global ocean covers about 71% of our planet and is central

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How scientists plan to build a detailed seafloor map by 2030 #IndiaNEWS
Marine scientists often feel like they are fumbling in the dark. The global ocean covers about 71% of our planet and is central to life as it exists on Earth. But only about 20% of the seafloor has been directly mapped so far.Survey ships equipped with sonars called multibeam echo sounders are being used to measure the depth of the seafloor to better understand it. But the size of the job is enormous. A single survey ship would take about 350 years to adequately map most of the seabed deeper than 200 metres, and it would take another 620 years to map the shallower areas.We must map the ocean faster. Today, marine surveying, or hydrography, is central to major international initiatives, including one that aims to see all of the ocean floor mapped in unprecedented detail by 2030.A more detailed and accurate global model of water depth would reveal the seafloor’s shape, and the data can be used to understand seabed composition. This will increase the safety of marine navigation, inform security and defence operations, improve oceanographic and climate studies, support various sectors of the sustainable ocean economy and guide decisions on habitat conservation. But it could also come with risks and costs.Unknown seaIn 2007, as an undergraduate co-op student working at the Geological Survey of Canada’s Pacific Geoscience Centre near Victoria, BC, I helped map seabed habitats and...Read more

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