aariПроблемы Арктики и АнтарктикиArctic and Antarctic Research0555-26482618-6713Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институтaari-78Research ArticleСтатьиИсследование погрешностей орбитального метода датирования льда по данным о его газосодержании на примере ледяного керна со станции Купол Фуджи (Антарктида)Assessing the uncertainties of an ice core time scale based on orbital tuning of air content records: a case study of the Dome Fuji (Antarctica) ice coreСкакунА. А.SkakunA. A.

Ведущий инженер.

Санкт-Петербург

skakun@aari.ruЛипенковВ. Я.LipenkovV. Ya.

Кандидат географических наук.

Санкт-Петербург

ГНЦ РФ Арктический и антарктический научно-исследовательский институтRussian Federation201630122016041429Copyright © Скакун А.А., Липенков В.Я., 20162016Скакун А.А., Липенков В.Я.Skakun A.A., Lipenkov V.Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.aaresearch.science/jour/article/view/78

Разработан алгоритм реализации нового метода датирования ледяных кернов, основанного на связи газосодержания ледникового льда с местной инсоляцией (Raynaud et al., 2007). Показано, что для совмещения рядов газосодержания с точно датированными расчетными рядами инсоляции идеально подходит техника непрерывного вейвлет-преобразования (CWT). Проведено тщательное исследование погрешностей орбитального тюнинга. Новый метод датирования впервые использован для построения орбитальной хронологической шкалы ледяных отложений в районе японской антарктической станции Купол Фуджи по данным о газосодержании полученного здесь ледяного керна. Стандартная ошибка возраста льда по этой шкале не превышает ±2,1 тыс. лет, т.е. близка к случайной погрешности оптимизированной временной шкалы AICC2012, разработанной ранее для пяти пунктов глубокого бурения в Антарктиде и Гренландии.

We have further elaborated an algorithm for implementing a new method of ice core dating, which is based on the link between air content of ice and local insolation (Raynaud et al., 2007).

Our study proves that continuous wavelet transform (CWT) is the most suitable tool for tuning the preliminary dated air content records on the calculated local insolation time series. The uncertainties associated with applying this technique to the experimental air content records have been thoroughly investigated. The new dating method was for the fi rst time applied to constructing the orbital time scale for the Dome Fuji ice core, using a composite air content record obtained from this site. A standard error of the thus obtained timescale was evaluated not to exceed ±2.1 ka, that is, close to the standard error of the optimized multi-proxy, multi-site AICC2012 chronology, previously developed for fi ve drilling sites in Antarctica and Greenland.

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The authors declare that there are no conflicts of interest present.