Steps for success of OCO-2
Steps for success of OCO-2
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DOI：
10.1038/ngeo2255
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发表时间：
2014-10
影响因子：
18.3
通讯作者：
John B. Miller;P. Tans;M. Gloor
中科院分区：
文献类型：
--
作者：
John B. Miller;P. Tans;M. Gloor
致编辑--杜蒙等人。1最近提出，格陵兰冰盖自2009年以来春季变暗是雪中吸光杂质增加的结果。他们提出，这些杂质由来自新的无雪地区的烟尘或灰尘组成。Dumont等人。提到微生物是潜在的光吸收杂质，但没有将生物活动纳入他们的数值雪模型中。我们认为，微生物，例如栖息在雪和冰中的色素藻类，可以导致反照率的大幅降低，这种影响需要包括在格陵兰冰盖的反照率数值模型中。栖息在雪中和雪上的真核藻类可以随着藻类的大量繁殖而在几周内将雪的颜色从白色变成绿色再到红色。此外，雪的完全融化暴露了大片下面的灰色冰层，这些冰层是棕黑色有色冰藻2-5的宿主，此外还有杜蒙和
To the Editor—Dumont et al. 1 recently suggested that the springtime darkening of the Greenland Ice Sheet since 2009 is a consequence of an increased load of light-absorbing impurities in snow. They proposed that the impurities consist of soot or dust derived from new snow-free areas. Dumont et al. mention microorganisms as potential light-absorbing impurities, but do not incorporate biological activity into their numerical snow model. We argue that microorganisms, such as the pigmented algae that reside in snow and ice, can cause a substantial reduction in albedo and that this effect needs to be included in numerical albedo models of the Greenland Ice Sheet.The eukaryotic algae that reside in and on snow can change the snow’s colour from white to green to red over a period of weeks as the algae bloom2. Furthermore, complete melting of the snow exposes large areas of underlying grey ice that host brown–black pigmented ice-algae2–5, in addition tothe soot and mineral dust impurities discussed by Dumont and