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降雨量通常与东亚季风强度成正比,而植物纤维素碳同位素组成又与降雨量成反比,因此泥炭纤维素碳同位素比值通常作为东亚季风强度变化的代用指标。由于季风影响的广泛性和区域性,临近发育的泥炭地植物纤维素碳同位素序列应该高度相关。为了验证这种假设,我们系统比较了吉林3处泥炭地3个泥炭剖面苔草纤维素2000年来的碳同位素序列。14 C时标控制的3个序列不呈现有意义的相关关系。不同时段,如过去500年、1000年、1500年和2000年来序列的长期趋势也不相关,序列中包含的周期完全不同。这些事实说明3处剖面苔草纤维素碳同位素比值记录的是当地性的而不是区域性的气候或环境信号,将泥炭纤维素碳同位素比值作为东亚季风强度变化的代用指标的合理性值得怀疑。
The rainfall is usually proportional to the intensity of the East Asian monsoon and the C isotopic composition of plant cellulose is inversely proportional to rainfall. Therefore, the C / C ratio of peat cellulose is usually used as a surrogate indicator of the intensity of the East Asian monsoon. Due to the widespread and regional impact of monsoon, plant cellulose carbon isotope sequences in the adjacent peatlands should be highly correlated. In order to test this hypothesis, we systematically compared the carbon isotopes of the mossy cellulose of three peat profiles in three peatlands in Jilin province since 2000. The three sequences controlled by 14 C time-scales do not show a significant correlation. Long-term trends over different time periods, such as those over the past 500, 1000, 1500 and 2000 years, are also irrelevant and the sequences contain entirely different cycles. These facts show that the ratio of carbon isotope of Calycifer C is a local rather than a regional climate or environmental signal, and the rationality of the C / C ratio of peat Cellulose as a surrogate for the intensity change of East Asian monsoon is questionable.