A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East

N. G. Razzhigaeva; T. A. Kopoteva; T. R. MakarovaT. A. GrebennikovaM. S. LyashchevskayaL. M. MokhovaL. A. GanzeyE. P. KudryavtsevaA. M. PanichevM. A. KliminKh. A. ArslanovF. E. MaksimovA. Yu. Petrol

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A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East

机译：A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East

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Comprehensive study of sections of mares in the Bolshaya Ussurka River basin has allowed highlighting climate changes over the past 2900 years. Reconstructions are based on the data of botanical, diatom, and palynological analyses and radiocarbon dating. The moisture content changed most significantly. Periods of prolonged droughts, which coincided with the weakening of the summer monsoon, were established. A long dry period continued from about 2900 up to 1360 yr BP. Dry conditions did not exclude floods caused by heavy rain caused by the passage of typhoons or deep cyclones. The Medieval Warm Period and Little Ice Age were humid and characterized by increased cyclogenesis. There were short-term fluctuations in humidity: droughts about 530-460 yr BP ago, then conditions became more humid about 400 yr BP and especially about 330-260 yr BP ago. The age ranges of periods with different flood activity and paleo-fires were determined. Events were correlated with data on regional and global events. A different response of mountain and bog landscapes to short-period climatic changes has been established. The role of the Korean pine in forest vegetation changed significantly; its distribution is controlled by changes in the hydroclimatic conditions. The optimum environments for the development of Korean pine forests were 780-530 yr BP ago. The role of Korean pine decreased during dry phases and after fires. The most variable vegetation of the mares was during the Little Ice Age. Modern anthropogenic changes in landscapes are also recorded in the sections. The scale of floods has significantly increased under human impact.

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来源
《Doklady earth sciences》 |2022年第1期|S69-S80|共12页
作者
N. G. Razzhigaeva; T. A. Kopoteva; T. R. MakarovaT. A. GrebennikovaM. S. LyashchevskayaL. M. MokhovaL. A. GanzeyE. P. KudryavtsevaA. M. PanichevM. A. KliminKh. A. ArslanovF. E. MaksimovA. Yu. Petrol;
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作者单位

Pacific Geographical Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041 Russia;

Institute of Water and Ecological Problems, Far East Branch, Russian Academy of Sciences, Khabarovsk, 680063 Russia;

St. Petersburg State University, St. Petersburg, 199034 Russia;

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正文语种英语
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climatic changes; floods; summer monsoon; cyclogeneses; landscapes; fires; Late Holocene;

A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East

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