Strong Release of Methane on Mars in Northern Summer 2003
Strong Release of Methane on Mars in Northern Summer 2003
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DOI：
10.1126/science.1165243
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发表时间：
2009-02-20
期刊：
影响因子：
56.9
通讯作者：
Smith, Michael D.
中科院分区：
文献类型：
--
作者：
Mumma, Michael J.;Villanueva, Geronimo L.;Smith, Michael D.
生物系统产生地球大气中90%以上的甲烷;其余的是地球化学来源。在火星上，甲烷可能是这两种来源的标志。我们在三个地面望远镜上使用高色散红外光谱仪，在2003年北方初夏和夏末以及2006年春分点附近的几个经度间隔上同时测量了火星上的甲烷和水蒸气。当存在时，甲烷发生在延伸的羽流中，并且纬度剖面的最大值意味着甲烷是从离散区域释放的。在北方仲夏，主要羽流含有约19，000公吨甲烷，估计的源强度（>= 0.6公斤每秒）与圣巴巴拉煤炭石油点的大量碳氢化合物渗漏相当。，加州。
Living systems produce more than 90% of Earth's atmospheric methane; the balance is of geochemical origin. On Mars, methane could be a signature of either origin. Using high- dispersion infrared spectrometers at three ground- based telescopes, we measured methane and water vapor simultaneously on Mars over several longitude intervals in northern early and late summer in 2003 and near the vernal equinox in 2006. When present, methane occurred in extended plumes, and the maxima of latitudinal profiles imply that the methane was released from discrete regions. In northern midsummer, the principal plume contained similar to 19,000 metric tons of methane, and the estimated source strength (>= 0.6 kilogram per second) was comparable to that of the massive hydrocarbon seep at Coal Oil Point in Santa Barbara, California.