Forty-seven years of weekly atmospheric black carbon measurements in the Finnish Arctic: Decrease in black carbon with declining emissions

被引:31
作者
Dutkiewicz, Vincent A. [1 ,2 ,3 ]
DeJulio, Anthony M. [2 ]
Ahmed, Tanveer [3 ]
Laing, James [4 ]
Hopke, Philip K. [4 ]
Skeie, Ragnhild B. [5 ]
Viisanen, Yrjo [6 ]
Paatero, Jussi [6 ]
Husain, Liaquat [1 ,2 ,3 ]
机构
[1] SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12222 USA
[2] SUNY Albany, Sch Publ Hlth, Dept Environm Hlth Sci, Albany, NY 12222 USA
[3] New York State Dept Hlth, Wadsworth Ctr, Albany, NY USA
[4] Clarkson Univ, Ctr Air Resources Engn & Sci, Potsdam, NY USA
[5] Ctr Int Climate & Environm Res, Oslo, Norway
[6] Finnish Meteorol Inst, Observat Serv, FIN-00101 Helsinki, Finland
基金
美国国家科学基金会;
关键词
LONG-TERM TRENDS; ATTENUATION CROSS-SECTION; AIR-POLLUTION; PARTICLE MEASUREMENTS; ELEMENTAL CARBON; KOLA-PENINSULA; SOURCE REGIONS; AEROSOL; TRANSPORT; SNOW;
D O I
10.1002/2014JD021790
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Concentrations of atmospheric black carbon, [BC], were determined from filter samples collected weekly at Kevo, Finland (69 degrees 45'N, 27 degrees 02'E), from 1964 to 2010 using optical and thermal optical methods. The data provide the longest record of directly measured [BC] in the Arctic. The mean winter, spring, summer, and autumn [BC] based on the entire data set were 339, 199, 127, and 213 ng m(-3), respectively. Annual mean [BC] decreased from similar to 300 in similar to 1970 to 82 ng m(-3) in 2010. [BC] data sets from other Arctic sites show similar trends, but concentrations at Kevo are generally higher. From similar to 1970 to 2010 the [BC] decreased by similar to 1.8% yr(-1). However, [BC] did not decrease monotonically. Instead, cyclical peaks occurred around 1976-1977, 1985-1987, and 1999. During such periods, nickel concentrations were well correlated with [BC]. This suggests that emissions from extensive ore smelting on the Kola Peninsula were significant contributors of particulate matter observed at Kevo. Simulations of [BC] at Kevo using the OsloCTM3 model using different emission inventories and meteorological data sets were performed. Modeled concentrations were lower than observed by a factor of 4. The results indicated that circulation changes can explain year to year variability, but the downward trend in the observations is mostly explained by emissions. Emission inventories in Europe, Russia, and the former Soviet Union are poorly constrained and appear to need revision in order to match observed trends in BC atmospheric concentrations.
引用
收藏
页码:7667 / 7683
页数:17
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