| Инд. авторы: | Ovchinnikov D., Kalugin I., Darin A. |
| Заглавие: | Climate variability in Altai mountains (Russia) in late holocene inferred from lake sediments, glacier and maximum latewood density of tree |
| Библ. ссылка: | Ovchinnikov D., Kalugin I., Darin A. Climate variability in Altai mountains (Russia) in late holocene inferred from lake sediments, glacier and maximum latewood density of tree // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM. - 2016. - Vol.1. - P.95-102. - ISBN 9786197105551; 9786197105582; 9786197105612; 9786197105636; 9786197105650; 9786197105681. - ISSN 1314-2704. |
| Внешние системы: | DOI: 10.5593/SGEM2016/B11/S01.013; SCOPUS: 2-s2.0-84994091583; |
| Реферат: | eng: To better understand past climate variability of vast terrestrial regions, reconstructions of different climate parameters are needed. Different types of climate proxy data may provide season-, time resolution-, and longevity-specific information. In this paper, we present a reconstruction of summer temperature and ablation of Malii Aktru glacier variability, Altay Mountains, for the past four centuries inferred from lake Teletskoe sediments and the maximum density of the tree-rings of Siberian larch trees found at the upper timberline. The Teletskoe lake is situated close to both the Malii Aktru glacier and the tree-ring-maximum-density-chronology site (approxinately 50.29N, 87.39E). Lake Teletskoe sediments provided seasonal climatic information for the late Holocene, especially regarding summer and annual temperature variations. Ablation of the Malii Aktru glacier was also clearly sensitive to summer temperature (correlation was 0.8; p=0.05; n=32). The tree-ring maximum density chronology was well correlated with summer temperature (r=+0.65-0.72; n = 60). Ablation of Malii Aktru glacier was reconstructed using the linear regression from the tree-ring maximum density chronology (r=+0.68; n=32; p=0.05 for the calibration period) for the period since 1601 AD. The summer temperature reconstructed from the data on the lake sediments was compared with the reconstructed ablation of Malii Aktru glacier for 1601-1994. A common low-frequency variability (100-200-year long cycles) was identified in the summer temperature and ablation for the reconstructed series. For example, a decrease in ablation of Malii Aktru coincided well with a temperature decrease that was found around 1700 AD and middle of 1850AD. The cold periods during LIA (Little Ice Age) were clearly pronounced in Altai Mountains climate reconstructions obtained from different climate proxies. Our study showed that various sources (tree-rings, glaciers and lake sediments) may be based upon to extract common information on climate low frequency variables, which helps better understand regional climate changes. © SGEM2016. |
| Ключевые слова: | Forestry; Regional climate changes; Maximum latewood density; Maximum density; Low frequency variability; Lake sediments; Climatic informations; Climate reconstruction; Altai mountains; Sediments; Repair; Laws and legislation; Landforms; Lakes; Climatology; Climate change; Ablation; Maximum density chronology; Lake sediments; Glacier Malii Aktru; Climate reconstruction; Altai mountains; Ablation; |
| Издано: | 2016 |
| Физ. характеристика: | с.95-102 |
| Конференция: | Название: 16th International Multidisciplinary Scientific GeoConference: Science and Technologies in Geology, Exploration and Mining, SGEM 2016 Даты проведения: 2016-06-30 - 2016-07-06 |