Changes in atmospheric lead and other pollution elements at Bermuda

被引:18
作者
Huang, SL
Arimoto, R
Rahn, KA
机构
关键词
D O I
10.1029/96JD02001
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Measurements of atmospheric lead at Bermuda during the Atmosphere-Ocean Chemistry Experiments (AEROCE) in 1993-1994 showed that annual-mean concentrations had decreased by an order of magnitude from the 1970s and by a factor of 4 since the 1980s. Seasonal patterns had changed as well, with lead no longer being highest during winter. Both changes are consistent with decreased use of leaded gasoline in North America, Pollution-derived zinc and antimony also decreased, probably because of reduced smelting in the United States or changed atmospheric transport to Bermuda. Lead/aluminum mass ratios depended on direction: 0.04 with western air-mass trajectories (pollution from North America) versus 0.0001 and 0.0003 with eastern trajectories. The eastern Pb/Al ratios were indistinguishable from typical crustal values of 0.0002. The lower eastern ratio probably represents pure Saharan dust, while the higher ratio may indicate minor amounts of superimposed pollution aerosol, possibly from Europe or the Mediterranean area. Crustal lead was not evident in the 1970s because more lead was emitted from gasoline and dust transport from the Sahara was weaker.
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页码:21033 / 21040
页数:8
相关论文
共 41 条
[31]  
PATTERSON CC, 1982, NATURAL LEVELS LEAD
[32]  
RAHN KA, 1976, ECHEM COMPOSITION AT
[33]   LEAD IN CORALS - RECONSTRUCTION OF HISTORICAL INDUSTRIAL FLUXES TO THE SURFACE OCEAN [J].
SHEN, GT ;
BOYLE, EA .
EARTH AND PLANETARY SCIENCE LETTERS, 1987, 82 (3-4) :289-304
[34]   THE IMPACT OF LEADED TO UNLEADED GASOLINE CONVERSION ON THE OCEANIC ISLAND OF BERMUDA [J].
SIMMONS, JAK ;
KNAP, AH .
ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS, 1993, 27 (11) :1729-1733
[35]  
SMITH D, 1995, AMBIO, V24, P21
[36]   GEOCHEMISTRY OF ATMOSPHERIC RADON AND RADON PRODUCTS [J].
TUREKIAN, KK ;
NOZAKI, Y ;
BENNINGER, LK .
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, 1977, 5 :227-255
[37]  
TUREKIAN KK, 1971, MCGRAW HILL ENCY SCI, P627
[38]   CONTINENTAL ORIGIN AND INDUSTRIAL SOURCES OF TRACE-METALS IN THE NORTHWEST ATLANTIC TROPOSPHERE [J].
VERON, A ;
CHURCH, TM ;
PATTERSON, CC ;
EREL, Y ;
MERRILL, JT .
JOURNAL OF ATMOSPHERIC CHEMISTRY, 1992, 14 (1-4) :339-351
[39]  
VERON A, 1988, THESIS U PARIS SUD F
[40]   RESPONSE OF LEAD CYCLING IN THE SURFACE SARGASSO SEA TO CHANGES IN TROPOSPHERIC INPUT [J].
VERON, AJ ;
CHURCH, TM ;
FLEGAL, AR ;
PATTERSON, CC ;
EREL, Y .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1993, 98 (C10) :18269-18276