Holocene Ecohydrological Variability on the East Coast of Kamchatka

Frontiers in Earth Science

Tiara Ogus²  Fabian Stute³  Andrei Andreev⁴  Jonathan Nichols⁵  Dorothy Peteet⁶ 

[1] Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Potsdam, Germany;Department of Chemistry, SUNY College of Environmental Science and Forestry, Syracuse, NY, United States;Fu Foundation School of Engineering, Columbia University, New York, NY, United States;Institute of Geology and Petroleum Technologies, Kazan Federal University, Kazan, Russia;Lamont-Doherty Earth Observatory, Palisades, NY, United States;NASA Goddard Institute for Space Studies, New York, NY, United States;

关键词: ecohydorology;    carbon cycle;    peatlands;    holocene;    Kamchatka;   

DOI  :  10.3389/feart.2019.00106

来源: DOAJ

【 摘 要 】

The Late Glacial and Holocene climate of the western North Pacific is less studied than that of the eastern North Pacific. While it is well known that strong east-west gradients in the tropical Pacific Ocean influence terrestrial climate, we seek to better understand how these gradients are expressed in the northern extratropics. Toward this aim, we present an organic and stable isotope geochemical and macrofossil record from a peatland on the east coast of the Kamchatka peninsula. We find that both the early and late Holocene were wetter, with a different assemblage of plants from the middle Holocene, which was drier, with more episodic precipitation. The large ecohydrological changes at several points during the Holocene are contemporaneous with and of the same sense as those we find at places to the east, such as south-central Alaska and to the south, in northern Japan. We also find that the middle Holocene period of warmth, dryness and low carbon accumulation occur contemporaneously with an enhanced east-west gradient in tropical Pacific sea surface temperature. This suggests that that hydroclimatic conditions in the subarctic can be influenced by tropical dynamics.

【 授权许可】

Unknown