Aeolian Moropholitogenesis on the Shores of the Northern Pacific

Abstract

AbstractThe features of the distribution of aeolian forms on the shores of the seas of the North Pacific have been established. The main reasons for the formation of an excess of sediment in the coastal zone, which explains the aeolian accumulation of short-range transport, are considered. It is shown that the cyclical nature of aeolian relief formation on the coast is associated with changes in the balance of sediments in the coastal zone, which are mainly determined by fluctuations in sea level. The main regularities of aeolodynamics on the shores of the Far Eastern seas in the Holocene are presented as follows. In coastal areas characterized by large volumes of detrital material removal from land, the development of aeolian accumulation processes is associated with a decrease in sea level. On the coast, where the influx of sediments into the coastal zone is provided mainly by marine hydrodynamic processes, aeolian deposits are formed during the period of increased erosion of the shores and the formation of excess sediment in areas of accumulation during sea level rise. Aeolian morpholithogenesis on volcanic shores may also be associated with the influx of a large amount of pyroclastic material into the zone of wave processing during explosive eruptions. The age of such dunes correlates with the age of volcanic pumice-tephra deposits and is in no way related to the established periods of high or low sea level.KeywordsCoastal dunesNorth PacificExplosive volcanic eruptionSubaerial beachSea level