Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.04.006 |
Characteristics and temporal variations of organic and elemental carbon aerosols in a high-altitude, tropical Latin American megacity | |
Ramirez, Omar1,2; Sanchez de la campa, A. M.1,3; de la Rosa, Jesus1,3 | |
2018-09-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 210页码:110-122 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; Colombia |
英文摘要 | Bogota is a Latin American megacity located at an average altitude of 2600 m in the tropical Andes. It registers frequent episodes of poor air quality due to high PM10 concentrations. The carbonaceous fraction is the main PM10 component ( > 50%), but there is a lack of specific studies analyzing the characteristics and temporal variability of organic carbon (OC) and elemental carbon (EC) aerosols. In this study, daily samples (24 +/- 1h) were collected from June 2015 to May 2016 (a total of 308 samples) at an urban background site during an El Nino year, and the quartz filters were analyzed using a thermal-optical method. Results showed that EC and organic matter accounted for similar to 60% of the PM10 mass. The OC and EC averages were 8.92 +/- 4.52 mu g/m(3) and 3.25 +/- 1.59 mu g/m(3), respectively. The months with the highest average OC values were January to March, while EC concentrations were relatively constant throughout the year. Regarding daily values, the highest mean concentrations of OC (10.2 +/- 5.13 mu g/m(3)) and EC (3.73 +/- 1.74 mu g/m(3)) were obtained on Thursdays, and the lowest on Sundays (OC = 6.67 +/- 3.04 mu g/m(3) and EC = 2.46 +/- 0.94 mu g/m(3)). The OC/EC ratio ranged from 1.66 (June) to 4.88 (March), with an annual average of 3.16 +/- 2.01. The secondary organic carbon (SOC) contributions, measured using the EC-tracer method, accounted for 45% of the total OC. The effective carbon ratio, which indicates an association between carbonaceous particles and climate change, ranged from 0.12 (July) to 0.74 (May). The study of air-mass origins revealed that days with air mass from E + NE registered the highest OC concentrations. This research provides new data on the variability of carbonaceous aerosols over the course of a year. It also highlights forest fires as a significant source of OC and EC, and indicates the high impact of SOC on OC concentration at the sampling site. |
英文关键词 | OC/EC Carbonaceous aerosol El Nino PM10 Megacity Colombia |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434903200009 |
WOS关键词 | PAULO METROPOLITAN-AREA ; URBAN BACKGROUND SITES ; CHEMICAL-COMPOSITION ; ATMOSPHERIC AEROSOLS ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; MASS CLOSURE ; AIR-QUALITY ; SAO-PAULO ; BROWN CARBON |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/38463 |
专题 | 地球科学 |
作者单位 | 1.Univ Huelva, Ctr Res Sustainable Chem CIQSO, Associate Unit CSIC Univ Huelva Atmospher Pollut, Campus El Carmen S-N, Huelva 21071, Spain; 2.Univ Costa, Dept Civil & Environm, Calle 58 55-66, Barranquilla 080002, Colombia; 3.Univ Huelva, Dept Earth Sci, Campus El Carmen S-N, Huelva 21071, Spain |
推荐引用方式 GB/T 7714 | Ramirez, Omar,Sanchez de la campa, A. M.,de la Rosa, Jesus. Characteristics and temporal variations of organic and elemental carbon aerosols in a high-altitude, tropical Latin American megacity[J]. ATMOSPHERIC RESEARCH,2018,210:110-122. |
APA | Ramirez, Omar,Sanchez de la campa, A. M.,&de la Rosa, Jesus.(2018).Characteristics and temporal variations of organic and elemental carbon aerosols in a high-altitude, tropical Latin American megacity.ATMOSPHERIC RESEARCH,210,110-122. |
MLA | Ramirez, Omar,et al."Characteristics and temporal variations of organic and elemental carbon aerosols in a high-altitude, tropical Latin American megacity".ATMOSPHERIC RESEARCH 210(2018):110-122. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论