The Influence of the Amur River Runoff on the Biogeochemical
Cycle of Iron in the Sea of Okhotsk

V. M. Shulkin^a, I. A. Zhabin^b, and A. A. Abrosimova^b

^a Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia

^b Pacific Institute of Geography, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia

e-mail: shulkin@tig.dvo.ru

Received July 3, 2011; in final form, January 30, 2012

Abstract—The report considers the distribution of the salinity, the particulate matter, and the dissolved and par-
ticulate forms of iron in the Amur Liman and Sakhalin Gulf under different volumes of the riverine runoff dur-
ing the summer periods. It was shown that the influence of the runoff variations is pronounced in the composi-
tion of the surface layer of the estuarine and coastal waters but smoothed within the bounds of the Sakhalin
Gulf. The dissolved iron is additionally exposed to the smoothing effect of the coagulation processes under the
mixing of the riverine and marine waters. The calculation of the iron utilization by the plankton points to the
key role of the production processes in the Sakhalin Gulf for the further migration of iron over the Sea of
Okhotsk.

DOI: 10.1134/S0001437014010093

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