A11C-0066
Ship-borne Observations of Atmospheric Black Carbon Aerosol Particles over the Arctic Ocean, Bering Sea, and North Pacific Ocean during September 2014
Monday, 14 December 2015
Poster Hall (Moscone South)
Fumikazu Taketani1, Takuma Miyakawa1, Hisahiro Takashima2, Yuichi Komazaki1, Yugo Kanaya1, Xiaole PAN3 and Jun Inoue4, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Fukuoka Daigaku, Fukuoka, Japan, (3)Kyushu University, Fukuoka, Japan, (4)NIPR National Institute of Polar Research, Tokyo, Japan
Abstract:
Measurements of refractory black carbon (rBC) aerosol particles using a highly sensitive online single particle soot photometer were performed on-board the R/V Mirai during a cruise across the Arctic Ocean, Bering Sea, and the North Pacific Ocean (31 August–9 October 2014). The measured rBC mass concentrations over the Arctic Ocean in the latitudinal region > 70°N were in the range 0–66 ng/m3 for 1-min averages, with an overall mean value of 1.0 ± 1.2 ng/m3. Single-particle-based observations enabled the measurement of such low rBC mass concentrations. The effects of long-range transport from continents to the Arctic Ocean were limited during the observed period, suggesting that such low rBC concentration levels would prevail over the Arctic Ocean. An analysis of rBC mixing states showed that particles with a non-shell/core structure made a significant contribution to the rBC particles detected over the Arctic Ocean.
