HR: 0800h
AN: A21C-0891    [Abstracts]
TI: Studies in the Chupa Inlet, White Sea, Russia in March-April 2004 in the Frame of Ocean-Atmosphere-Sea Ice-Snowpack (OASIS) Interactions Program
AU: * Shevchenko, V P
EM: vshevch@geo.sio.rssi.ru
AF: P.P. Shirshov Institute of Oceanology RAS, Nakhimovsky prospekt, 36, Moscow, 117997 Russian Federation
AU: Demina, L L
A21C-0891 AF: P.P. Shirshov Institute of Oceanology RAS, Nakhimovsky prospekt, 36, Moscow, 117997 Russian Federation
AU: Filippov, A S
A21C-0891 AF: P.P. Shirshov Institute of Oceanology RAS, Nakhimovsky prospekt, 36, Moscow, 117997 Russian Federation
AU: Gordeev, V V
A21C-0891 AF: P.P. Shirshov Institute of Oceanology RAS, Nakhimovsky prospekt, 36, Moscow, 117997 Russian Federation
AU: Koutsenogii, K P
A21C-0891 AF: Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya street, 3, Novosibirsk, 630090 Russian Federation
AU: Novigatsky, A N
A21C-0891 AF: P.P. Shirshov Institute of Oceanology RAS, Nakhimovsky prospekt, 36, Moscow, 117997 Russian Federation
AU: Smirnov, V V
A21C-0891 AF: Institute of Experimental Meteorology of Roshydromet, Lenina street, 82, Obninsk, 249020 Russian Federation
AB: The composition of aerosols, snow, ice and sea water was studied in the Chupa Inlet, the White Sea in the vicinity of the Polar Circle from March 26 to April 8, 2004. Concentrations of aerosols were very low and typical for background areas. One event of sharp aerosol concentration growth and high enrichment of aerosol by heavy metals have been registered when air masses arrived from the Monchegorsk copper-nickel smelter area (Kola Peninsula). The thickness of snow cover over the sea ice was 5-15 cm. Particulate matter concentration in the snow varied from 0.33 to 2.63 mg/l, the average value was 0.84 mg/l (n = 16 samples). This value is typical background concentration for pristine environment. The concentrations of Fe, Mn and some trace element (Zn, Cr, Ni, Co, As) in fresh snow were low, but Cd, Pb concentrations were one order higher than the Arctic background level. It could be explained by typical long-distance transport of Pb and Cd in the atmosphere. The thickness of ice cover in the Chupa Inlet varied from 23 to 39 cm. Particulate matter concentration in ice cores was generally 0.7-3.6 mg/l, increasing to 13.4-26.3 mg/l in the bottom 2 cm of the ice where microalgae bloom took place. The distribution of suspended particulate matter (SPM) in the water column of the axial part of the Chupa Inlet is characterized by two maximum: concentration of SPM was 0.7-0.9 mg/l in the 1 m under-ice layer, where biological productivity is higher), it decreased to 0.3-0.5 mg/l at the depth about 20 m and increased to 1.2 mg/l in the near-bottom nepheloid layer as a result of resuspension of bottom sediment by currents. Our studies were supported by the Project No. 6 of Federal Program "The World Ocean" and grants of RFBR No. 04-05-64925 and 05-05-65159. We thank the staff of the White Sea Biological Station of Zoological Institute RAS for support. The authors are indebted to Academician A.P. Lisitzin for valuable recommendations.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0330 Geochemical cycles (1030)
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005