A study of different‑scale relationship between changes of the surface air temperature and the СО2 concentration in the atmosphere

• Published in: Ice and Snow
• Main Authors: N. Vakulenko V., V. Kotlyakov M., F. Parrenin, D. Sonechkin M., Н. Вакуленко В., В. Котляков М., Ф. Парренин, Д. Сонечкин М.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: IGRAS 2016
• Subjects: atmospheric СО2 concentration; crosswavelet analysis; global air temperature; the transition from the last glacial maximum to the Holocene; глобальная температура воздуха;концентрация СО2 в атмосфере;кроссвейвлетный анализ;переход от последнего гляциального максимума к голоцену; Antarctic; The Antarctic; Antarc*; EPICA
• Online Access: https://ice-snow.igras.ru/jour/article/view/341; https://doi.org/10.15356/2076-6734-2016-4-533-544

A concept of the anthropogenic origin of the current global climate warming assumes that growth of concentration of the atmospheric carbon dioxide and other greenhouse gases is of great concern in this process. However, all earlier performed analyses of the Antarctic ice cores, covering the time interval of several glacial cycles for about 1 000 000 years, have demonstrated that the carbon dioxide concentration changes had a certain lag relative to the air temperature changes by several hundred years during every beginning of the glacial terminations as well as at endings of interglacials. In contrast to these findings, a recently published careful analysis of Antarctic ice cores (Parrenin et al., 2013) had shown that both, the carbon dioxide concentration and global temperature, varied almost synchronously during the transition from the last glacial maximum to the Holocene. To resolve this dilemma, a special technique for analysis of the paleoclimatic time series, based on the wavelets, had been developed and applied to the same carbon dioxide concentration and temperature time series which were used in the above paper of Parrenin et al., 2013. Specifically, a stack of the Antarctic δ18O time series (designated as ATS) and the deuterium Dome C – EPICA ones (dD) were compared to one another in order to: firstly, to quantitatively estimate differences between time scales of these series; and, secondly, to clear up the lead–lag relationships between different scales variations within these time series. It was found that accuracy of the mutual ATS and dD time series dating lay within the range of 80–160 years. Perhaps, the mutual dating of the temperature and carbon dioxide concentration series was even worse due to the assumed displacement of air bubbles within the ice. It made us to limit our analysis by the time scales of approximately from 800 to 6000 years. But it should be taken into account that any air bubble movement changes the time scale of the carbon dioxide series as a whole. Therefore, if a difference ...