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Titolo:
Transport patterns and potential sources of total gaseous mercury measuredin Canadian high Arctic in 1995
Autore:
Lin, CJ; Cheng, MD; Schroeder, WH;
Indirizzi:
Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab Oak Ridge TN USA 37831 nm Sci, Oak Ridge, TN 37831 USA Oak Ridge Associate Univ, Oak Ridge, TN 37830 USA Oak Ridge Associate Univ Oak Ridge TN USA 37830 , Oak Ridge, TN 37830 USA Environm Canada, Atomospher Environm Serv, Downsview, ON M3H 5T4, Canada Environm Canada Downsview ON Canada M3H 5T4 Downsview, ON M3H 5T4, Canada
Titolo Testata:
ATMOSPHERIC ENVIRONMENT
fascicolo: 6, volume: 35, anno: 2001,
pagine: 1141 - 1154
SICI:
1352-2310(2001)35:6<1141:TPAPSO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
NATIONAL-METEOROLOGICAL-CENTER; ATMOSPHERIC TRANSPORT; PRECIPITATION CHEMISTRY; ELEMENTAL MERCURY; SURFACE EXCHANGE; FLOW PATTERNS; REMOTE AREAS; TRAJECTORIES; DEPOSITION; PATHWAYS;
Keywords:
mercury; receptor modeling; trajectory; cluster analysis; atmospheric transport; source identification;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Cheng, MD Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab POB 2008 Oak Ridge TN USA 37831 TN 37831 USA
Citazione:
C.J. Lin et al., "Transport patterns and potential sources of total gaseous mercury measuredin Canadian high Arctic in 1995", ATMOS ENVIR, 35(6), 2001, pp. 1141-1154

Abstract

Trajectory cluster analysis and the potential source contribution function(PSCF) model have been used to investigate the source-receptor relationship for the total gaseous mercury (TGM) measured in the Canadian High Arctic (Alert, 82.5 degreesN, 62.3 degreesW) during 1995. Cluster analysis of 10-day back-trajectories in 1995 shows that the synoptic flows arriving at Alert are dominated by the air masses from the north. Long-range transport onlyoccurs in the cold seasons while summertime flows tend to circulate in theArctic Ocean. The potential source regions identified by the PSCF modelinginclude Eurasia and populated areas in the North America and Europe. Basedon the modeling results, it is suggested that the elevated TGM concentrations found in the Arctic summer should be of geological origins, mainly fromthe evasion of volatile Hg-0 from earth's surfaces. In the autumn and winter, mercury is transported to the receptor site from remote anthropogenic sources. The preferred sources of TGM in the spring cannot be clearly determined due to the Arctic springtime mercury depletion, which significantly reduces the number of trajectories contributing to PSCF values. Using TGM data of higher temporal resolution improves the sensitivity of the PSCF modeling results. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 01:50:25