翻訳と辞書 Words near each other ・ Methamidophos ・ Methamnetamine ・ Methamphetamine ・ Methamphetamine and Native Americans ・ Methamphetamine in the United States ・ Methamphetamine use in Australia ・ Methan mani ・ Methana ・ Methana Volcano ・ Methanandamide ・ Methanation ・ Methandriol ・ Methandrostenolone ・ Methane ・ Methane (data page) ・ Methane chimney ・ Methane clathrate ・ Methane monooxygenase ・ Methane monooxygenase (particulate) ・ Methane reformer ・ Methanediol ・ Methaneseleninic acid ・ Methanesulfonate monooxygenase ・ Methanesulfonic acid ・ Methanesulfonic anhydride ・ Methanesulfonyl chloride ・ Methanesulfonyl fluoride ・ Methanetetracarboxylate ・ Methanethiol ・ Methanethiol oxidase Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Methane chimney ： ウィキペディア英語版 Methane chimney A methane chimney or gas chimney is a rising column of natural gas, mainly methane within a water or sediment column. The contrast in physical properties between the gas phase and the surrounding water makes such chimneys visible in oceanographic and geophysical data. In some cases, gas bubbles released at the seafloor may dissolve before they reach the ocean surface, but the increased hydrocarbon concentration may still be measured by chemical oceanographic techniques. ==Identification== In some locations along Russia’s northern coast, methane rising from the sea floor to the surface has caused the sea to foam. However, most methane chimneys do not produce such visible signs at the sea surface. Instead, plumes are identified by a combination of chemical and physical oceanographic and geologic data.〔http://woodshole.er.usgs.gov/project-pages/hydrates/climate.html〕 Plumes of methane bubbles, whether in the water column or subseafloor sediments, have lower density and sound speed than the surrounding water. As such, these plumes can be imaged by a variety of acoustic techniques, including seismic reflection data and conventional fishfinders. Dissolved methane is usually identified through widespread chemical analysis of water samples, including gas chromatography of gasses extracted from the headspace of seawater samples taken at depth (headspace is the space above a sample in a sealed container, which forms as higher temperature and lower pressure allows gasses to come out of solution). Continuous measurements of methane concentration in seawater can be made by underway ships using cavity ring-down spectroscopy. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Methane chimney」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.