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Direct Experiments on the Ocean Disposal of Fossil Fuel CO_2

机译:化石燃料CO_2的海洋处置的直接实验

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Substantial progress has been made in carrying out small-scalernfield experiments to investigate the scientific basis for disposalrnof CO_2 that results from burning of fossil fuels in the deeprnocean. A remotely operated vehicle (ROV) was used to carryrnliter quantities of CO_2 to depths from 250 to 3650 m in thernocean and to release the CO_2 in a controlled manner. A videornimaging system allowed observation of the behavior of thernCO_2 released. CO_2 released at intermediate depths formsrnbubbles that rise. Below about 2750 m liquid CO_2 is morerndense than sea water, and CO_2 released at greater depthsrndescends further. Hydrate formation was observed for depthsrnbelow about 350 m. We show through video imagery, directrnmeasurement, and model calculations that the dissolution raternof liquid CO_2 in the deep ocean is 3 μmoles/cm 2 /sec. Thernslow dissolution rate limits the local concentration of CO_2.rnLimited observations of the approach of marine life to CO_2rnreleased on the sea floor showed no apparent avoidancernreactions.
机译:在进行小规模油田实验以研究处置深层有机岩中化石燃料所产生的CO_2的科学基础方面已经取得了实质性进展。使用遥控车辆(ROV)将大量的CO_2运送到海洋生物中250至3650 m的深度,并以受控方式释放CO_2。视频成像系统允许观察释放的rnCO_2的行为。在中间深度释放的CO_2形成气泡上升。在大约2750 m以下,液态CO_2比海水更稠密,而在更大深度处释放的CO_2进一步下降。在约350 m以下的深度观察到水合物的形成。我们通过视频图像,直接测量和模型计算表明,深海中液态二氧化碳的溶解速率为3μmoles/ cm 2 / sec。缓慢的溶解速度限制了CO_2的局部浓度。对海洋生物向海底释放CO_2的途径的有限观察表明,没有明显的回避反应。

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