|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Cyclicity of Natural Processes in the Last 300 Years Imprinted in the TreeRing Proxies in Subarctic European Russia Revealed by Wavelet Analysisстатья
Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.
- Авторы: Solomina O.N., Aptikaeva O.I., Shatalin Yu A.
- Журнал: Izvestiya - Atmospheric and Oceanic Physics
- Том: 46
- Номер: 7
- Год издания: 2010
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 830
- Последняя страница: 837
- Аннотация: We studied the cyclic structure of the earlywood ring width and maximum density of larch and spruce (International TreeRing Data Bank) at the northern treeline in European Russia. On the basis of correlation analyses, local chronologies are combined into seven regional ones. The chronologies of maximum density correlate positively with summer (May–August) temperature. The response functions for the early wood ring width are chaotic. However, a wavelet analysis of instrumental coldperiod (October–April) precipitation series and regional earlywood chronologies shows a similarity in their cyclic pattern. On the basis of a wavelet analysis, it was found that the chronologies of the western and northern regions of European Russia have a similar cyclic structure over the last 300 years, while the Ural chronologies differ from them in some respects. The longterm (40–100 years) variations dominate in the earlywood chronologies, whereas the chronologies of maximum density also contain shortterm (5–20 years) variations. The 100 and 11year cycles, which are probably modulated by solar activity, are detectable in all regional chronologies of early wood width and maximum density. Cycles with periods of 40, 20–22, and 5 years in the treering chronologies are most likely triggered by the North Atlantic Oscillation, which has a similar cyclic structure.
- Добавил в систему: Аптикаева Ольга Ивановна