Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean
6 pages, 3 figures.-- PMID: 17874762 [PubMed].-- Printed version published on Aug 15, 2007.
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| Format: | artículo biblioteca |
| Language: | English |
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American Chemical Society
2007-07-14
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| Subjects: | Atmospheric transport, Polycyclic aromatic hydrocarbons (PAHs), Wind speed, Aerosol loads, |
| Online Access: | http://hdl.handle.net/10261/10178 |
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dig-idaea-es-10261-101782019-02-25T10:22:01Z Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean Vento, Sabino del Dachs, Jordi Atmospheric transport Polycyclic aromatic hydrocarbons (PAHs) Wind speed Aerosol loads 6 pages, 3 figures.-- PMID: 17874762 [PubMed].-- Printed version published on Aug 15, 2007. Supplementary information (Annexes I-VI, 4 figures, 2 tables, 10 pages) available at: http://pubs.acs.org/doi/suppl/10.1021/es0707660/suppl_file/es0707660si20070531_014549.pdf Atmospheric transport and deposition of polycyclic aromatic hydrocarbons (PAHs) over tropical oceans has not yet been studied even though tropical oceans account for 35% of the global oceans. Here we show the results from measurements of gas- and aerosol-phase PAHs and dry deposition samples in the NE tropical Atlantic Ocean atmosphere, a region between 26° and 21° N, off shore of the Saharan desert. The results show that PAHs concentrations are high at the coastal ocean (15-20 ng m-3 for sum of 27 gas-phase individual PAHs) and decrease by a factor of 2-3 at open ocean (26° W). The spatial variability observed is consistent with dilution, reaction, and deposition during transport. Atmospheric dry deposition velocities ranged between 0.1 and 0.3 cm s-1 with higher deposition velocities for the more volatile PAHs. Outbreaks of Saharan Dust significantly increase the deposition rates of PAHs. The occurrence and deposition of PAHs in tropical regions is complex and results from the interplay of a number of processes, such as wind speed, aerosol loads, important sources from West Africa, processes controlling the diurnal variability, and sequestration driven by high primary productivity regions. The measured average atmospheric residence times of gas- and aerosolphase PAHs are 3.7 and 3.5 days, respectively. We gratefully acknowledge the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and/or READY website (http://www.arl-noaa.gov/ready.html) used in this publication. S.D.V. acknowledges Ph.D. fellowship from the Catalan Government. This research is part of DEPOCEC projects, founded by the Spanish Ministry of Education and Science. S. Agustí is acknowledged for leading the COCA cruise. Peer reviewed 2009-02-02T12:20:57Z 2009-02-02T12:20:57Z 2007-07-14 artículo http://purl.org/coar/resource_type/c_6501 Environmental Science & Technology 41(16): 5608-5613 (2007) 0013-936X http://hdl.handle.net/10261/10178 10.1021/es0707660 1520-5851 en http://dx.doi.org/10.1021/es0707660 none 19968 bytes application/msword American Chemical Society |
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ES |
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Biblioteca del IDAEA España |
| language |
English |
| topic |
Atmospheric transport Polycyclic aromatic hydrocarbons (PAHs) Wind speed Aerosol loads Atmospheric transport Polycyclic aromatic hydrocarbons (PAHs) Wind speed Aerosol loads |
| spellingShingle |
Atmospheric transport Polycyclic aromatic hydrocarbons (PAHs) Wind speed Aerosol loads Atmospheric transport Polycyclic aromatic hydrocarbons (PAHs) Wind speed Aerosol loads Vento, Sabino del Dachs, Jordi Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean |
| description |
6 pages, 3 figures.-- PMID: 17874762 [PubMed].-- Printed version published on Aug 15, 2007. |
| format |
artículo |
| topic_facet |
Atmospheric transport Polycyclic aromatic hydrocarbons (PAHs) Wind speed Aerosol loads |
| author |
Vento, Sabino del Dachs, Jordi |
| author_facet |
Vento, Sabino del Dachs, Jordi |
| author_sort |
Vento, Sabino del |
| title |
Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean |
| title_short |
Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean |
| title_full |
Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean |
| title_fullStr |
Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean |
| title_full_unstemmed |
Atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical Atlantic Ocean |
| title_sort |
atmospheric occurrence and deposition of polycyclic aromatic hydrocarbons in the northeast tropical and subtropical atlantic ocean |
| publisher |
American Chemical Society |
| publishDate |
2007-07-14 |
| url |
http://hdl.handle.net/10261/10178 |
| work_keys_str_mv |
AT ventosabinodel atmosphericoccurrenceanddepositionofpolycyclicaromatichydrocarbonsinthenortheasttropicalandsubtropicalatlanticocean AT dachsjordi atmosphericoccurrenceanddepositionofpolycyclicaromatichydrocarbonsinthenortheasttropicalandsubtropicalatlanticocean |
| _version_ |
1777669128025276416 |