Algae: Rain Gauge of the Ages

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Algae: Rain Gauge of the Ages

机译：藻类：世纪雨量计

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Algae obtain all their hydrogen from the water in which they live. By measuring the two stable isotopes of hydrogen-deuterium and protium-in the lipids of algae that are preserved in sediment underneath tropical lakes, we can infer the amount of rainfall that occurred when they lived. The deuterium/protium (D/H) ratio of many algae has a linear relation with the D/H ratio of the water. The water ratio, in turn, reflects the rate of precipitation relative to evaporation in a lake's area. Within the tropical rain band region, where rainfall is frequent and heavy, the D/H ratio of lake and seawater is low. Outside the region, where evaporation can exceed precipitation, the D/H ratio is high.

机译：藻类从它们生活的水中获取所有氢。通过测量藻类脂质中氢，氘和pro的两个稳定同位素，这些同位素保存在热带湖泊下面的沉积物中，我们可以推断出它们生活时发生的降雨量。许多藻类的氘/ pro（D / H）比率与水的D / H比率呈线性关系。反过来，水比反映了湖泊地区降水量相对于蒸发量的比率。在热带雨带地区，那里的降雨频繁且多雨，湖泊和海水的D / H比很低。在蒸发量可能超过降水量的区域之外，D / H比很高。

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《Scientific American》 |2011年第3期|p.62|共1页
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
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Algae: Rain Gauge of the Ages

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