Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-7459-2020 |
Long-term brown carbon and smoke tracer observations in Bogota, Colombia: association with medium-range transport of biomass burning plumes | |
Manuel Rincon-Riveros, Juan1; Alejandra Rincon-Caro, Maria1; Sullivan, Amy P.2; Felipe Mendez-Espinosa, Juan1; Carlos Belalcazar, Luis3; Quirama Aguilar, Miguel1; Morales Betancourt, Ricardo1 | |
2020-06-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:12页码:7459-7472 |
文章类型 | Article |
语种 | 英语 |
国家 | Colombia; USA |
英文摘要 | Light-absorbing aerosols emitted during open biomass burning (BB) events such as wildfires and agricultural burns have a strong impact on the Earth's radiation budget through both direct and indirect effects. Additionally, BB aerosols and gas-phase emissions can substantially reduce air quality at local, regional, and global scales, negatively affecting human health. South America is one of largest contributors to BB emissions globally. After Amazonia, the BB emissions from wildfires and agricultural burns in the grassland plains of northern South America (NSA) are the most significant in the region. However, few studies have analyzed the potential impact of NSA BB emissions on regional air quality. Recent evidence suggests that seasonal variations in air quality in several major cities in NSA could be associated with open biomass burning emissions, but it is still uncertain to what extent those sources impact air quality in the region. In this work, we report on 3 years of continuous equivalent black carbon (eBC) and brown carbon (BrC) observations at a hilltop site located upwind of the city of Bogota, and we demonstrate its association with fires detected by the MODerate-resolution Imaging Spectroradiometer (MODIS) in a 3000 km x 2000 km domain. Offline PM2.5 filter samples collected during three field campaigns were analyzed to quantify water-soluble organic carbon (WSOC), organic and elemental carbon (OC/EC), and biomass burning tracers such as levoglucosan, galactosan, and potassium. MODIS active fire data and HYSPLIT back trajectories were used to identify potential biomass burning plumes transported to the city. We analyzed the relationship between BrC, WSOC, water-soluble potassium, and levoglucosan to identify signals of the regional transport of BB aerosols. Our results confirm that regional biomass burning transport from wildfires occurs annually during the months of January and April. The seasonality of eBC closely followed that of PM2.5 at the city air quality stations; however, the observed seasonality of BrC is distinctly different to that of eBC and strongly associated with regional fire counts. The strong correlation between BrC and regional fire counts was observed at daily, weekly, and monthly timescales. WSOC at the measurement site was observed to increase linearly with levoglucosan during high BB periods and to remain constant at similar to 2.5 mu gC m(-3) during the low BB seasons. Our findings show, for the first time in this region, that aged BB plumes can regularly reach densely populated areas in the Central Andes of northern South America. A source footprint analysis involving BrC observations, back trajectories, and remotely sensed fire activity shows that the eastern savannas in NSA are the main BB source region for the domain analyzed. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000543796900003 |
WOS关键词 | AEROSOL SOURCE APPORTIONMENT ; NORTHERN SOUTH-AMERICA ; AIR-QUALITY IMPACTS ; LIGHT-ABSORPTION ; BLACK CARBON ; ELEMENTAL CARBON ; VEGETATION FIRES ; EMISSION FACTORS ; ORGANIC AEROSOL ; CHEMICAL-CHARACTERIZATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/278047 |
专题 | 地球科学 |
作者单位 | 1.Univ Los Andes, Civil & Environm Engn Dept, Bogota, Colombia; 2.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA; 3.Univ Nacl Colombia, Bogota, Colombia |
推荐引用方式 GB/T 7714 | Manuel Rincon-Riveros, Juan,Alejandra Rincon-Caro, Maria,Sullivan, Amy P.,et al. Long-term brown carbon and smoke tracer observations in Bogota, Colombia: association with medium-range transport of biomass burning plumes[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(12):7459-7472. |
APA | Manuel Rincon-Riveros, Juan.,Alejandra Rincon-Caro, Maria.,Sullivan, Amy P..,Felipe Mendez-Espinosa, Juan.,Carlos Belalcazar, Luis.,...&Morales Betancourt, Ricardo.(2020).Long-term brown carbon and smoke tracer observations in Bogota, Colombia: association with medium-range transport of biomass burning plumes.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(12),7459-7472. |
MLA | Manuel Rincon-Riveros, Juan,et al."Long-term brown carbon and smoke tracer observations in Bogota, Colombia: association with medium-range transport of biomass burning plumes".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.12(2020):7459-7472. |
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