The rate of peat accumulation in the Holocene in Kamchatka

摘要

The most favorable conditions for peat accumulation in Kamchatka existed during the Atlantic climatic optimum of the Holocene (5000-6000 yrs ago) and in the Boreal period (8000-9000 yrs ago). Less favorable conditions were in the Subboreal period. The growth of peat substrates in Kamchatka in the modern period is estimated at 1.1-1.5 mm/yr. During the earlier stage of the Subatlantic period (except for the last century), it comprised 0.1-0.3 mm/yr. The rate of peat growth in the Subboreal period varied within 0.03-0.08 mm/yr. During the Atlantic optimum, it increased up to 0.08-0.5 mm/yr. During the earlier stage of the Atlantic period, it comprised 0.06-0.2 mm/yr and, during the Boreal period, 0.1-0.6 mm/yr. The most significant variations in the rate of the peat accumulation in Kamchatka are related to changes in the climatic conditions of the peninsula from its western coast to its eastern coast