Issue |
E3S Web of Conferences
Volume 1, 2013
Proceedings of the 16th International Conference on Heavy Metals in the Environment
|
|
---|---|---|
Article Number | 03005 | |
Number of page(s) | 3 | |
Section | Heavy Metals in the Atmosphere I: “Regional Scales” | |
DOI | https://doi.org/10.1051/e3sconf/20130103005 | |
Published online | 23 April 2013 |
Long term measurements of the elemental composition and optical properties of aerosols in Amazonia
1 Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, AM, Brazil
2 Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
3 Universidade Federal de São Paulo, Campus Diadema, Diadema, Brazil
4 Universidade Federal de Rondonia, UNIR, Porto Velho, Brazil
Aerosols are being collected and analyzed for trace elements in two sites in Amazonia since January 2008. On eof the site, Manaus is located in a very pristine area in Central Amazonia. The site is nt affected directly by any urban plume for thousands of kilometers. A second site is located in Porto Velho, in a region with heavy land use change and deforestation. Optical properties (light scattering ad absorption) are also being measured in order to study the climatic impact of aerosols. It was observed a clear seasonal pattern for both sites, with higher concentrations in the dry season. But the difference in seasonal concentrations observed for Porto Velho is much larger due to stronger anthropogenic influences. In Manaus during the wet season, very low concentrations of heavy metals, maybe the smallest measured in continental regions are reported. Positive Matrix Factorization (PMF) was used to separate the different aerosol components. In general, for fine and coarse mode and wet and dry season, 3 aerosol components could be observed: 1) Natural biogenic aerosol; 2) biomass burning component; 3) Soil dust both locally and long range transported Sahara dust
Key words: Amazon / Atmospheric aerosol / Atmospheric chemistry / Heavy metals / optical properties
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.