Palaeoclimatology: The record for marine isotopic stage 11
Palaeoclimatology: The record for marine isotopic stage 11
复制标题
古气候学：海洋同位素第 11 阶段的记录
作者：
D. Raynaud;J. Barnola;R. Souchez;R. Lorrain;J. Petit;Paul Duval;V. Lipenkov
海洋同位素第11阶段（MIS 11）是地球历史上一个非常长的间冰期，发生在大约40万年前，持续了大约3万年。在此期间，到达地球的太阳能分布发生了微弱的天文学变化。这种轨道气候强迫的条件与今天的间冰期相似，它们使气候容易受到其他强迫的影响-例如，大气二氧化碳水平的变化。在这里，我们使用冰芯数据从南极东方核心重建一个完整的大气二氧化碳记录MIS 11。记录表明，整个间冰期的二氧化碳值接近地球工业化前的水平，太阳能和二氧化碳可能有助于使MIS 11异常长。当时海洋沉积物中记录的海洋碳酸盐系统的异常，例如珊瑚礁形成时，显然没有留下大气二氧化碳浓度的特征。
The marine isotopic stage 11 (MIS 11) is an extraordinarily long interglacial period in the Earth's history that occurred some 400,000 years ago and lasted for about 30,000 years. During this period there were weak, astronomically induced changes in the distribution of solar energy reaching the Earth. The conditions of this orbital climate forcing are similar to those of today's interglacial period, and they rendered the climate susceptible to other forcing — for example, to changes in the level of atmospheric carbon dioxide. Here we use ice-core data from the Antarctic Vostok core to reconstruct a complete atmospheric carbon dioxide record for MIS 11. The record indicates that values for carbon dioxide throughout the interglacial period were close to the Earth's pre-industrial levels and that both solar energy and carbon dioxide may have helped to make MIS 11 exceptionally long. Anomalies in the oceanic carbonate system recorded in marine sediments at the time, for example while coral reefs were forming, apparently left no signature on atmospheric carbon dioxide concentrations.